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Continued Investigation of Failure of Midland Unit 1 RPV Anchor Studs, Data Rept
	ML19345G580
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Site:	Midland
Issue date:	02/11/1981
From:	; TELEDYNE ENGINEERING SERVICES
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	TR-4599-1, NUDOCS 8104070549
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,0. CONSUMERS POWER COMPANY Q JACKSON, MICHIGAN 49201

'O I

O iO TR-4599-1

O CONTINUED INVESTIGATION OF THE FAILURE OF MIDLAND UNIT 1 RPV ANCHOR STUDS DATA REPORT O

FEBRUARY 11, 1981 I

O 10 THIS DOCUMENT CONTAINS

O POOR QUAUTY PAGES WTESWNE ENCNNEERNG SEMCES 303 BEAR H.'LL ROAD

.WALTHAM, M ASSACHUSETTS 02154 617-890-3350

_pyous V1

O TM Technical Report MM TR-4599-1 53 TABLE OF CONTENTS PAGE C) - 1.0 Introduction 1 2.0 Background 1 2.1 Materials 1 C) 2.2 Test Program 2

, 2.3 Test Procedures 2 2.3.1 Longitudinal Hardness Traverse, Stud 35 2

- 2.3.2 Diametral Hardness Tests, Stud 35 2 l> 2.3.3 Diametral Hardness Traverses, Stud 3, 35, and 36, and Response to Tempering 3 2.3.4 Charpy Impact Testing 3 2.3.5 .Retempering Experiment, Charpy Specimens 3 2.3.6 Jominy Hardenability Tests 4 c3 2.3.7 Tempering Experiment, Jaminy Specimens 5

's 2.3.6 Miscellaneous Hardness Measurenents 5 2.3.9 Meta 11ographic Examination of Jominy Specimens 5 3.0 Results 6 o

's 3.1 Results of Longitudinal Hardness Traverse Stud 35 6 3.2 ~ Charpy Impact Results 7 3.3 Diametral Hardness Traverse Results, Stud 35 7 C) ~ 3.4 Results of Diametral Hardness Traverses and Response to Tempering for Studs 3, 35, and 36 7 3.5 Results of Retempering Experiments, Charpy Specimens 7 c, 3.6 Jominy Hardenability Tests 7 v

3.7 Results of Jominy Tempering Experiments 7 3.8 Miscellaneous Hardness Tests 7 3.9 Meta 11ographic Examination. 8

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.O WTELEDGE Technical Report MM f TR4599-1 i TABLE OF CONTENTS (Continued) pAGE

O 4.0 Discussion of Results 8 4.1 Jominy Hardenability Results 8 4.2 Increases in Hardness in Tempering 9

O-4.3 Hardness Gradient, Stud 3 9 Tables 12-28 Figures 29-54

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Appendix I 10

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1eTELBWNE I'n,'N*) "" '* ENGREERNG SOMCES O 1.0 Introduction Telectyne Engineering Services (TES), under contract to Bechtel Asso-ciates Professional Corporation, had conducted an investigation of the preservice failure of three reactor vessel anchor studs at the Consumers O Power Company, Midland Plant, Unit 1. The results of that investigation, and interpretation of these results were presented in TES reports TR-3887-1, TR-3887-2, and TR-3887-1, Addendum 1. The cause of the failures was found to be stress corrosion of studs that were harder than expected

,O f or the specified material and heat treatment. These reports, however, did not identify the cause of the high hardness.

Subsequently, TES, under contract with Consumers Power Company (CPC0)

O has conducted further testing. The primary purpose of this testing was to identify the cause of the high hardness in the Midland Unit 1 Atuds.

Secondary objectives included trying to learn more about the distribution of hardness in the failed stud (number 35) and determine the Charpy tresi-

"n tion temperatures for number 3 stud material.

This report presents the results of the further testing, and where appropriate, presents results from the previous reports. No attempt is made at interpretation of these results. A second report, TR-4599-2, provides a more detailed dt.cussion and interpretation of the results presented herein to the extent that those results relate to the cause for high hardness.

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2.0 Background

2.1 Materials A description of the geometry of the anchor stud installation

. and the anchor studs can.be found in TR-3887-1. ~The test program described in this report used materials 1 eft over from the previous failure analysis investigation. A list. of these materials is . given in Appendix I.

TR 3887-1 ~and TR-3887-1, Addendum 1 ~ show where specimens were removed and how each stud was-sectioned.

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Tcchnical Report yg TR-4599-1 g gg O

2.2 T_est Program The following tests were performed:

g a) Hardness tests, b) Charpy impact tests,

[ c) Jominy hardenability tests, and

, d) Tempering of Jominy bars and previously tempered samples of

.O the anchor studs.

Hardness' tests were conducted using both conventional Rockwell ,

type hardness testers as well as a portable hardness tester called the Equo-Tip which produces hardness numbers which can be converted to the O

Rockwell scale. The Equo-Tip hardness tester was described in more detail in section 3.6 of TR-3887-1.

g 2.3 Test Procedures 2.3.1 Longitudinal Hardness Traverse, Stud 35 A hardness traverse was made along the length of stud 35 using the portable hardness tester. Where the stud was threaded, a flat 0 was machined'and ground to the thread root to provide a suitable surface for testing. Otherwise a ground finish was prepared on the outer diameter of the stud using hand surface grinders, g- 2.3.2. Diametral Hardness Tests, Stud 35 l

Stud 35 was. sectioned at locations selected based on the

{ longitudinal hardness traverse. The sectioning and specimen identifi-

,k cation plan is shown' in Figure 1. On the sectioning saw cut surfaces a l

j tiametral hardness traverse was performed ur,ing the portable hardness

, tester. ' Five hardness ,mdentations were made equally spaced from the i . center of the stud to within 1/8 inch of the surface. '

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Tcchnical Rep:rt TN TR-4599-1 N SER\/ ICES 3

0 2.3.3 Diametral Hardness Traverses, Stud 3, 35, and 36, and Response to Tempering Each of the failed studs had a thin (s1/4 inch) slice of g material cut from a section immediately behind the fracture surface for diametral hardness traverse measurements and for chemical analysis for the 3 previous inves.1gation. Each of these sections were divided into four 4

j slices and- the hardness measured for each slice from the center outward.

g( 'One slice from each stud was then tempered at 650, 750, or 850 F, and the hardness measured a second time.

2. 3 . 4, Charpy Impact Testing g Six Charpy specimens were lef t frca the previous investi-gation efforts, all from stud 3. These Charpy specimens are impact tested at 212, 300, 350,.450, and 500 F to provide a sufficient number of speci-mens for.2.3.5 'and to determine if a transition temperature existed for U

g this material. Tests at 500 F were conducted by the University of Michigan.

2.3.5 Retempering Experiment, Charpy Specimens 3 There were two goals to this testing. The first was to estimate the original tempering temperature. The second was to measure the effect of time on' tempering response for this material, g_ Broken halves of Charpy specimens from the previous in-J. vestigation and from 2.3.4 above,' were sectioned in half'again resulting I in fotJr samples from each Charpy specimen for a total of 16 specimens.

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4 3 Hardness measurements were made on each specimen:on those surfaces which were originally near the center and near the surface as the Charpy specimen was machined from the stud. .The notched side of the Charpy specimens was:always nearesti the center.

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yg TR-4599 , , 4 SBRN/lCES i Four specimens were tempered at each of four tempering O tenperatures (650, 750, 850, and 950 F). The four specimens at each '

tcmperature were tempered for a different time (1, 2, 4, and 3 hours3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months ), and quenched in water.

LO After tempering, the surfaces originally tessed were ,

ground to remove s.cale, and tested again for hardness.

4 i

j - 2.3.6 Jominy Hardenability Tests Oi The most comon method of determining the response of a material to quenching is to perform Jominy hardenability tests on a sample of the material.

0? Three Jominy hardenability specimens were prepared from sections of stud 35, and one specimen was prepared from the remains of stud 0

+ ' 36 . All ' samples were. tempered at 1000 F to increase machinability. The specimens were machined concentric to the longitudinal- axis of the stud.

0. Testing was in accordance with ASTM A-255.

The specimen. prepared from stud 36 was 1/8 inch too short to meet the A-255 requirements so this specimen was machined without a iO L- flange on - one end. A 1/8 inch thick washer was bolted opposite the quenched:end to make the specimen the proper length and to serve as a fl ange.'

O- Due to difficulty in interpreting the ASTM Standard,

[ these four specimens were-normalized at 1700 F and austenitized at 1700 F.

i before quenching. Because.these temperatures were incorrect according to j 4 A-255,:two additional-~ specimens were prepared from stud 35, normalized at - >

1600 F andiaustenitized at '15500F, 'to oetermine if quenching response

.would'be different.- '

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- Af ter quenching, four flats were ' machined -on each spec-O imen, eparated by. 90' degrees aroundJ the - circumference. Hardness was i

imeasured at 1/16th inch . intervals ' out to at' least 24/16th's on all 'four flats.

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j Technical R;part ygg TR-4599-1 gg 2.3.7 Tempering Experiment. Jominy Specimens TES tempered the Jominy specimens to determine the tem-pering response of the as-quenched material. The first four Jominy speci-mens were sectioned longitudinally into quarters producing a total of 16 specimens. The quarters of each Jominy specimen were tempered at tempera-tures of 650, 750, 850, and 950 F for one hour. Af ter tempering, the

~. original flats were reground and tested again for hardness at 1/16th inch intervals.

O 2.3.8 Miscellaneous Hardness Me nurements A hardness traverse was performed along the length of tensile specimen TE-2, lef t over from the previous investigation. The purpose of this test was to suppliment the longitudinal hardness data in Table V of 3887-1 by measuring the hardness of stud 3 near the end, since preparation of . specimens from the end of this stud had consumed all the available surface material. Thus, this tensile spec ~imen was the only remaining material on which a hardness measurement could be made.

A hardness traverse was made across the end of stud 36 prior to machining the Jominy specimen. A previous longitudinal hardness traverse had shown higher hardnesses at the end of the stud than antici-pated by a previous radial traverse on the end of stud. This test was to be used to confirm this result.

g' 2.3.9 Metallographic Examination of Jominy Specimens Decarburization. on the surface tested for hardness can result in low hardness readings. Therefore, samples were checked for

_ decarburization. Grain size can also affect hardenability, and the ASTM Standards equire' the reporting of- grain size as part of the Jominy test.

All the'Jominy specimens tempered at 650 F, both Jominy

, specimens from the repeated tests, and samples from-the three studs were

-sent to CPC0 for examination to determine grain size. Depth of decarburi-zation, if any, was also measured on the Jominy specimens.

3

n Technical Report 9g TR-4599-1

.n" The procedure used to determine the prior austenite grain size was an alternate method to the McQuaid-Ehn grain size measurement technique. A heat treatment embrittles the 4140 material by causing solutes to migrate to prior austenite grain boundaries. Use of the proper a,

etchant reveals a structure of preferentially etched prior austenite grain boundaries and makes possible a determination of the prior austenite grain size.

O Samples (supplied by TES) were heat treated at 925U F for 16 hours1.851852e-4 days 0.00444 hours 2.645503e-5 weeks 6.088e-6 months , followed by air cooling. The specimens were mounted in thermo-setting plastics, and metallographically polished. They were then etched g in hot, saturated, picric acid. Etching time was 30-45 seconds and result-ed in a blackened . surface. Careful polishing for a short time (15-30 seconds) on the final cloth wheel removed the black etchant corrosion product and the prior austenite grain size could be observed with a metal-

., lograph.

O 3.0 RESULTS m 3.1 Results of Longitudinal Hardness Traverse Stud 35 v

Some hardness tests had been performed and reported in TR-3887-1, Addendum 1 on the end of stud 35, which had been cut off for examination of the fracture surface. The results of the longitudinal n hardness traverse performed on stud 35, and the results previously reported are sunnarized in Table I and presented graphically in Figure 2.

A linear least squares fit to the data is shown in Figure 2.

i g 3.2 Charpy Impact Results

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Charpy impact test results are presented in Table II. TES could not discern a transition temperature over the temperature range tested.

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O Technical Report TN TR-4599-1 N SONCES O

3.3 Diametral Hardness Traverse Results. Stud 35 Results of the diametral hardness traverses are given in Table III.

O 3.4 Results of Diametral Hardness Traverses and Response to Tem-pering for Stujs 3, 35, and 36 Results of this retempering experiment are given in Table IV g along with' specimen identification and pre-tempering hardnesses.

3.5 Results of Retempering Experiments, Charpy Specimens Results of this retempering experiment are given in Table IV.

O Results are presented graphically in Figures 3a and 3D.

3.6 Jominy Hardenability Tests Jominy'hardenability results are plotted for the six specimens o in Figures 4 to 9 along with scatter band limits for this material. The scatter bands are from Metals Handbook, Vol. I, Ninth Edition. The results plotted in Figures 4 to 9 are also presented in Tables VI through IX and Xa and Xb.

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.3'1 Results of Jominy Tempering Experiments, Results of the tempering of the Jominy specimens is presented in Figures 10 to 13 and also in Tables VI to IX.

O 3.8 Miscellaneous Hardness Tests Results of the hardness tests on tensile specimen TE-2 are pres-

.ented .in Table XI. Results of the hardness traverse on stud 36 are a presented in Table XII along with results from the; previous hardness test on this stud. The results confirmed the previous radial hardness traverse.

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Technical Report TN TR-4599-1 8

NSONICES 0

3.9 Metallographic Examination Results of the metallographic examination are shown in Figures 14 through 23. Grain sizes are given in Figures 14 through 22. Decarburi-g zation is shown in Figures 23 through 28.

4.0 Discussion of Results The following discussion deals strictly with the validity of the

,g results presented. Interpretation of results will be undertaken in TR-4599-2.

4.1 Jominy Hardenability Results

g Even though the first four Jominy specimens were austenitized and normalized at high temperatures, TES still considers the results ob-tained to be valid. This is based on the results of the duplicate spec-i-mens which, when properly heat treated per ASTM A-255, gave the same O results.

The higher heat treating temperature could have introduced errors in the following ways:

O

1) The additional heat in the specimens would have required more time to remove, in effect, slowing the cooling rate, which would have had the effect of moving the Jominy data to tae left on the 3 Jominy plots (lowering hardenability).

2) The higher temperature would have caused additional grain growth which would have raised hardenability.

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3) Decarburization on .the right surfaces tested for hardness can cause low hardness readings, g Since the grain sizes of the Jominy specimens are the came as for the Midland stud material, the Jominy specimens should be representative of the stud material. Also, the grain size is the same for all the Jominy specimens, therefore the high temperature did not af fect grain growth. The

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WTB. EDGE U"N'}"*P"* ENGNEERNG SERVICES 9

O Jominy speciniens were all checked for decarburization. any decarburization present was less than the amount ground off each specimen in preparation for hardness testing. The original and replicate Jominy specimens gave approximately the same results, therefore the additional heat apparently O did not_ affect hardenability.

On balance it appears that any errors introduced as a result of high normalizing and austenitizing temperatures were not significant.

4.2 Increases in Hardness in Tempering The tempering experiment on the Jominy bars, and the retempering experiments on actual stud material revealed an interesting phenomena:

O-All samples tempered, or retempered at 650 F exhibited a tendency to get slightly harder (1-2 HRC) rather than softer. This is particularly evident on the retempered.Jominy bars beyond 10/16ths and the retempered Charpy specimens. TES does not have an explanation for this phenomena, but considers it consistent enough to be real, rather than scattar in the data.

TES does not feel this phenomena is related to the cause of failure.

4.3 Hardness Gradient, Stud 3 O

In~ TES report TR-3887-1, it was noted that stud 3 did not exhibit a diametral hardness gradient while studs 35 ant

36 had pronounced gradi-ents. This observation was supported by the fact that hardness measured on the ends of the remaining Midland Unit 1 studs showed that approv.imately O

half of the studs had, an observable hardness gradient, and half did not.

Thus,'it appeared as though some studs had a hardness gradient and some did not.

O At the time TR-3887 was prepared, the only reason TES could find forfsome studs not having a. hardness gradient' was that the material had unusually high hardenability, resulting in a nearly uniform as quenched ~ hardness across the diameter of the stud.

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O Technical Report YM TR-4599-1 6 $8{\ ACES 10 0

Based on the Jominy results presented herein, it is clear that studs 35 and 36 (which is f rom the same heat as stud 3) cannot be charac-terized as having high hardenability. Since studs 35 and 3 are not sub-O stantially different in composition, and stud 36 is from the same heat as stud 3, we would expect similar Jominy results for material taken from stud

3. Thus, based on the information presented so far, there is no reason for stud 3 to not have a hardness gradient.

O If there were a difference in hardenability between the material near the center of the stud and the material near the surface such that the surface had low hardenability while the center had high hardenability, it 0 is concejvable that in quenching a nearly flat profile could be produced.

It is possible that stud 3 actually does have a hardness gradient but the sample selected for the diametral hardness profile was at a loca-O tion with an unusually flat profile. That stud 3 did have a hardness gradient.became apparent in measuring the Charpy specimens for hardness when it was observed that on the V notch side of the specimen the hardness was considerably and consistently lower than on the opposite side of the O same specimen (the V notch side was the side closest to the center of the stud as the specimens were machined from the stud). This can be seen in Table Ve*

O The hardness on the opposite side of the V notch (and just below the surf ace) is very nearly the same as the surf ace hardness of stud 3 as reported in TR-3887-1. The hardness of the V notch side is very nearly the same as for the hardness in the corresponding location in studs 35 and 36.

O This is all shown in Figure 29.

Hardness measured in tensile specimen TE-2, which came from ap-proximately the same location as the center of the Charpy specimens is also O plotted in Figure.29. In order to confirm the presence of a gradient.

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O Technical- Report YN TR-4599-1 NSOMCES 11 D hardness was measured along the length of Charpy specimen CE-2 left from the_ earlier investigation. These results are presented as well in Figure

29. Clearly the Charpy specimen from the center of the stud is harder than the material taken from approximately the 3/4 radius position (specimen O .TE-2) and is. consistent with the observation of no hardness gradient.

It 'is TES',s opinion, based on these observations, that stud 3 has

O '- always had a gradient and the results reported earlier, while correct, are for a location not. representative of the remainder of the stud. It is also TES's opinion, based on these results, that the presence or absence of a hardness gradient on the end of the studs is probably not representative of

!O the hardness gradient in the remainder of the stud.

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'TR-4599-1 TABLE I.

. Longitudinal Hardness

. Traverse Stud 35 Distance * - Hardness (HRC) .Olstance -Hardness (HRC) Distance Hardness (HRC) Distance Hardness (HRC)

'ifnches) 1 2 -(inches) 1 2 (Inche}), 1 2 (inches) 1 2

'l 41.7 40.9 - 26 43.3 42.4 51 44.0 44.3 75 45.6 44.5 2 41.3 42.4 27 43.7 43.6 52 46.3 46.9 76 43.8 46.9

.3 43 42.0 28 43.2 43.2 53 45.3 47.7 77 45.3 45.3 4 39.7 45.2 29 42.7 42.7 54 44.2 47.1 78 45.8 43.9 5 '41.4 45.0 30 43.4 42.4 55 46.4 46.3 79 45.2 45.2 6 42.0 ~ 4 3.6 31 42.1 13.3 56 46.1 44.4 80 43.7 41.4 7 '44,0 43.9 . 32 44.4 42.6 57. 45.8 44.2 81 44.0 8' .' 4 3. 2 43.4 33' 42.0 43.9 58 44.0 40.8 +81.25 44.?

.9 45.8 43.9 34 41.9 '43.2 59 43.4 45.1 +81.5 4 4.C-48.6 .46.1 43.0 43.2 46.2 +8'.75 43.0 c 10 35 42.4 60 11 145.5 45.5 36 42.7 43.3 61 47.3 44.4 +82 45.0 12 46.2' .46.1 37 43.2 43.3 62 47.0 46.1 +82.25 43.5 13' 46.1 43.6 38 43.3 43.3 63 46.3 46.3 +82.5 43.0 U T 14 . 45.3 45.8 39 41.2 42.9 64 45.7 44.8 482.75 45.5 15 45.8 46.8 40 43.0 42.5 65 45.1 44.3 +83 46.0 16 " 39.4 45.5 41 42.7 45.5 66 45.2 46.2 +83.25 47.5 17 43.3 42.6 42 44.8 46.4 67 44.8 43.7' +83.5 47.5

18 .42.0 44.0 43 44.3 44.2 68 43.3 44.8 +83.75 48.0 19 44.3' 42.4 44 43.7 45.3 69 43.2 45.5 fractured end 20 42.4 42.7 45 43.1 43.6 70 45.2 46.8 21' 41.7 40.3 46 43.1 43.3 71 45.3 45.3 22 43.2 41.4 47 41.3 43.2 72 44.5 A$,8 23 42.2 42.1 48 44.3 44.8 73 45.0 47.6 24 43.0 43.1 49 45.3 46.1 74 47.0 44.4 25 - 42.5 42.4

50 42.6 42.1 "End of threaded length

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From threaded end ' + Results Reported in TR-3887-1 Addendum 1 TF1Fr7(NE ENGNEERING SERVICES

I4 1 13 Y essensa ms O

Table II Charpy Impact Test Results O Specimen Test Impact Identification Percent lateral Temperature Energy Shear Expansion CD5* 400F 6.5 Ft-lbs 0 0 CD1* 5.5 0 0 0 CE2* 6.5 0 0 CD3* 7.0 0 0 CD4* ,, 6.0 0 0 CE1* 0 70 F 8.0 0 0 3 -CD2* 7.0 0 0 CE3* 8.0 0 0

CCI 212 F 12.0 10 0.75 mils CC2 350 F 19.0 60 3.5

O CB2 450 F 19.0 50 3.5 CA1 300 F 16.0 40 3.0 0

CA2 500 F 25.0 40 3.0 CBI 500 F 22.0 60 3.5

.g.

Reported in TR-3887-1, Rev.1 i

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. Technical: Report

,> lTR 459941 TablefIli'-

Diametral Hardness (HRC) Traverse Stud 35 .

4 Location on

' Location'on Stud Diameter. . .

4599-1-1 4599-2-5 .4599-1-3 4599-1-3 4599-1-4 Left Erd Right End 1 (edge)- 42.5 39.7~ 46.1 43.9 45.5 2:

41.7- .38.5 43.0 38.4 43.2 3 36.8- 34.8 41.1 37.5 37.6 4 35.0 33.2 35.5 33.6 33.6

> 5 - (Center) ' .34.0 .33.5' 34.5 34.1 34.1

~

'6 34.6 33.3 36.6 34.3 35.0

'7- 37.0 36.2 41.9 36.1- 35.5 8- .42.0' 38.0 42.2 40.3 42.7 ._,

43.7 45.2

9-(edge)~ 42.4 41.4- 44.5 i

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fTR-459941-

-TABLE ^IV?

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. RESPONSE TO RETEMPERING

DIAMETRALl HARDNESS TRAVERSE SAMPLES * ,

+

1 Retempering Hardness-

' 650' F -: -

. 750* F' .

850 F Before -

After.

Before ' ' After Before .After Specimen .. Tempering -- Tempering' . Tempering :

Tempering - . Tempering . Tempering .

35' 39 36.5 37.5 35.0 34 3887-3' _ 38.5 39.5 36. 37 39.5 '37.5

(Stu'd 35);- ;41 42-: 38.5 39 44.5 42 48 47 47 46 ' 47.5 44

'40 40.5 36- 36.5 36.5 35 39.5 3887-2 43.5 44.5 40 39 37 1(Stud;36)1; f45 ' 45. 5 - '43.5 44.5 42 40.5

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46 46.5. 47 46 47.5 42.5

-44.5 44.5 42 44.5. 45.5 41.5 43.5 13887-1 41 44.5' 44' 45 46.0

,(Stud 3 ) :38.5 45.0 44.5- 44 44.5 41

-45.5 49.0- -48 47.5 47 42.5

'34 -35.0 =- 36 36 35 33

4599-1-5 35 36.0 40.5 41 37 34.5 37.5 39 40 41 37.5

.(Stud.35) 336 :

.41- 42.0- '43 43.5 42.5 40

~*: Top number in .each series. corresponds to center of stud and bottom number is within 1/8" of the surface.

W TELEDYPE ENGSEERINC SBMCES

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q v 9p q Technical Report 16 TR-4599-1 O

Table V(a)

HardnessofCharpySpecimensBgforeandAfter Tempering at 650 F

% Hardness V Notch Side

l Outs.de**

Charpy Specimen Before After Before After Identification Tempering Tempering Tempering Tempering 42 43.5 <

45.5 46.5 CC2-A 43.5 44 46 46.5 i Tempered 41 43.5 44 46.5 D One Hour 43 44 45 46.5 43 43.5 45 46 1 42 42 45 46.5 CB2-A 44 43.5 45 45.5 g

i ~' Tempered 42 43.5 44.5 45.0 Two Hours 44 44 44 46.0 43.5 44 44.5 46.5 41.5 42 46 47 h

CA1-A 43.5 42 47 47.5 Tempered 42 42.5 46 47 Four Hours 42.5 43 47 47 ci 43 43.5 45.5 47.5 41 43 45.5 46 CCl-A 41 43 46 46 ii Tempered 41.5 43 44.5 46 D Eight Hours 42 44 44.5 45.5 43 43.5 44.5 46

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Side nearest-center of stud 1- ** Side nearest surface of stud

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O TM ENGNERNG SERVCES Technical Report TR-4599-1 17 O

TableV(b)

HardnessofCharpySpecimenBgforeandAfter Tempering at 750 F 0

Hardness Char py V Notch Side

Outside**

Specimen Before After Before After Identification Tempering Tempering Tempering Tempering O,

44 43 46.5 45.5 CC2-8 44 43.5 46 45 Tempered 43.5 42.5 46.5 45 g One Hour 44 43 46.5- 44.5 44 43 47 45 43.5 42 45.5 44.5 CB2-B '43.5 42 45.5 44.5 O Temp eed 44 43 45 44.5 Two Hours 44 42.5 45 43.5 44 42.5 45.5 45 42 40.5 47 46

'~'

cal-B 46.5 41.5 47 45

. Tempered 44 41.5 45.5 44.5 Four Hours 43 42.5 46 45.5 44.5 42 46.5 45.5 Ll) -

44 40.5 45.5 44.5

-CCl-B '44.5 41 46 44 Tempered 42.5 43 46.5 44.5

~) Eight Hours 47.5 41 46.5 43.5 43 43 45.5 44

Side nearest center of stud ~

- Side nearest surface of stud q

O ENG3EERNG SERVCES Technical Report i TR-4599-1 18 l

Table V(c)

HardnessofCharpySpecimensBgforeandAfter Tempering at 850 F O i Hardness Charpy V Notch Side * 'Outside**

Specimen Before After Before After Identification Tempering Tempering Tempering Tempering 44.5 40.5 47 42 CC2-C 44.5 39.5 46.5 42.5 Tempered 44 40 46.5 42 g_ One Hour 44.5 40 46.5 41.5 44.5 41 46 39.5 44.5 40 45.5 41

~CB2-C 44.5 40.5 45.5 41.5 O Tempered. 44 39.5 46 41.5

.Two Hours 44 39.5 46 41 44.5 40.5 46 41.5 42 39.5 46.5 42 0'-

cal-C -44 39 47.5 41.5 Tempered 41 37.5 46.5 42 Four Hours 42 38 46 42 43 40.5 47 39 J

42.5 38 46 40

,CCl-C 44 38 46.5 41 Tempered 43 38 46 40.5 g Eight-Hours 44 38 47 40 44 39.5 46.5 38.5

Side nearest center of stud

- Side nearest surface.of stud q

-x.,

O WTEUED(hE Technical Report TR-4599-1 19 O

Table V(d)

Hardness of Charpy Specimens Before and After Tenipering at 950 F O

Hardness Charpy V Notch Side

Outside**

Specimen Before After Before After Identification. Tempering Tempering Tempering Tempering V

42.5 37 46 38.5 CC2-D 44 36.5 47 38.5 Tempered 43 38 45.5 38.5 g_ One Hour 44.5 36.5 46.5 38.5 44.5 37 46 39 42.5 37 45 38 CB2-D 45 36.5 45 37.5 O. Tempered 42 36.5 45.5 37 Two Hours 44 37 46 37.5 43.5 37 45.5 38 42 35.5 46.5 38 cal-D 42 36 47 37-Tempered 41.5 -35.5 46 38 Four Hours 43 33 47 38 44 35 47 37.5

.O 42 35 46 36.5 CCl-D 43 35 46 36.5 Tempered 42.5 35 46 36.5 O Eight Hours 43.5 35 47 7, 43.5 35 ~46 36.5

Side nearest center of stud

~** Side nearest. surface of' stud D.

b~

WTE.EIME :

Technical Report N ES TR-4599-1 20 Table V(e)

Average Hardness of Charpy Specimens Before and After .

Tempering at all Temperatures D

Hardness Charpy V Notch Side

Outside**

-Specimen Tempering Before After Before After 3: -Identification Time (Hrs) Tempering Tempering Tempering Tempering CC2-A 1 42.5 43.7 45.1 46

." : CB2-A 2 43.1 43.4 44.6 45.9 j h cal-A 4 42.5 42.6 46.3 47.2 CCI-A 8 41.7 43.3 45.0 45.9 CC2-B 1 43.9 43.0 46.5 45.0 u.- -CB2-B 2 43.8 42.4 45.3 44.4 3--

cal-B 4- :44.0 41.6 46.4 .45.3

{ CCl-B 8 -43.3 41.7 46.1 44.1

CC2-C- 1 44.4 40.2 46.5 41.5

} 'CB2-C 2 44.3 40.0- 45.8 41.3

u. l

-L cal C 4 42.4 38.9 46.7 41.3 E CC1-C 8- 43.5 :38.3 46.4 40.0 D_ CC2-D 1 43.7 '37.0 46.2 38.6 i -CB2-0 2 43.4 -36.8 45.4 37.6

J. '

-.u. - ~

cal-D 4- 42.5 35.0 46.7 37.7

{ :CC1-D 8: 42.9~ 35.0 46.2 36.6 k '

Averages 43.2: 46.0 --

J Side nearest: center. of stud

- Side nearest surface of stud

.m n' h '

t

~._

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u <;

0 0- 0 0 O O O- -Ut O-iT chnical Report

-TR-4599-1. J0MINY END. QUENCH RESULTS

~ NORMALIZING' TEMP: 41700'F ' 'AUSTENITIZING. TEMP: 1700 F TEMPERING TEMP: 650 F

4599-2-5-A .#36-A #4599-1-2-A #4599-1-4 A DISTANCE * :HRC HRC~ HRC- HRC -HRC' HRC HRC HPC~

BEFORE- AFTER BEFORE AFTER BEFORE AFTER BEFORE AFTER TEMPER TEMPER TEMPER TEMPER TEMPER . TEMPER TEMPER TEMPER 1 51.0 46.5 50.0 47.0 .55.5 ' '47.0 50.0 48.0

'2: -52.0 47.0. 52.0' 47.5 55.5 49.5 51.0 49.5

3. 50.0- 46.5- 51.5 48.0 55.0 49.5 52.0 49.5 4 47.5 44.5 -51.0 45.0 54.5 49.5 52.0 49.5 5 45.0 44.0- -50.0 .44.5 54.0 49.5 52.5 50.0 6 .43.0 43.5- 47.0 43.0 53.0 49.5 52.0 49.5 7L 41.5 ~42.5 -44.5 40.5 53.0 50.0 50.0 50.5 8' 40.0 -40.5 42.0 40.0 .52.0 49.0 49.5 50.0 m 9 '38.5 39.0 41.0 39.0 51.0 49.0 48.5 49.5

.10 .36.5 39.0 38.5 37.0 50.0 47.5 48.0 49.0

.11 . 35.0 -37.0 37.5 .39.0- 48.0 47.0 44.5 47.5 12' 32.0 29.0 35.5 39.0 47.0 47.5 45.0 48.0 13 30.5- 30.0- 34.5 36.5 46.5 45.5 43.5 46.0

.14 -32.0 -34.5. 34.0 37.0 46.0 46.5 41.0 45.0 15- 31.0 33.5 33.0 36.5 45.5 46.0 39.0 42.5 16 31.0 30.5 32.5 36.0 44.5 45.0 38.0 44.0 17- 29.5' 32.0 32.0 34.0 44.5 44.5 38.0 42.5 18 30.0 33.5 '31.0 34.0 43.5 43.5 37.5 39.0 19 32.0- 34.5 31.0 31.5 42.5 42.0 37.0 39.5 20 32.5 34.5 30.5 32.0 41.5 41.5 36.0 38.0 21 33.0' 34.0 30.5 32.0 41.5 42.5 35.0 37.0 22 33.5 33.5 30.0 30.5 41.5 42.0 35.0 37.5 23' 33.5 34.0 29.5 30.5 39.5 41.0 35.0 37.5

-24 33.5 33.5 29.0 30.5 37.0 38.5 35.0 36.0 25- 33.0 34.0 29.5 32.5 37.0 39.0 35.0 34.5 26- 32.0 33.5 30.0 29.0 36.0 38.0 35.0 37.0 27 '31.5 35.0 29.0 32.0 35.5 37.0 32.0 36.0 28 -31.0 33.5 28.5 29.5 35.0 38.0 29.0 34.0 29 31.0 33.5 28.0 28.0 35.0 37.0 30.0 34.5 30 27.5 28.0 35.0 38.5 30.0 34.0

From Quenched Ena in 1/16ths" WTELE[7/NE ENGNEERNG SOMC8

). l0 s -O; .O: O fQ O O 'O YO.

LTichnicaliReport TABLE.VII TR-4599-1 ..

- J0MINY END-QUENCH RESULTS NORMALIZINGiTEMP: .1700 F' AUSTENITIZING TEMP: 1700 F-

. TEMPERING ' TEMP: '750 F.

4599-2-5-B; .

36-B .#4599-1-2-B #4599-1-4-B HRC HRC .HRC HRC HRC- HRC HRC

. DISTANCE * .-HRC AFTER :BEFORE AFTER BEFORE- AFTER . BEFORE AFTER BEFORE TEMPER TEMPER' TEMPER TEMPER TEMPER TEMPER TEMPER' : TEMPER

-l' 49.5- 44.5- .48.0 43.0 55.5 43.0 .49.0 45.5

-50.0 4!6 .0 51.0~ 45.0 55.5 45.5 50.0 47.5 2'

3. ;48.5 - 44.5' 51.5 45.5 55.5 46.5- 49.0 48.0

'4' 47.5- - 44.0 - 50.0 45.0 55.0 47.5 47.0 47.5 5 e47.5 43.0 48.5 44.5 53.5 47.5 48.5 47.5 6 46.0 43.0 47.0 44.0 '53.5 48.0 52.0 49.0 43.5 38.0 43.0 41.5 52.5 48.0 50.5 47.5 7-37.0 40.5 40.0 52.0 48.0 50.5 47.5 m

'8 41.5 46.5 9 40.5 34.0 37.5 39.5 50.5 47.5 48.5 39.0 35.0 35.5 37.0 49.5 46.5 47.0 46.0 10 38.0. 36.5 -36.5' 37.5 48.5 45.5 45.5 45.0 11

.37.0 34.5 35.0 34.0 46,0 44.5 44.0 43.5 12 36.0 36.0 34.0 34.5 44.0 44.0 43.5 42.0 13 35.0 35.0 33.0 34.0 40.0 41.5 42.5 41.0 14-34.5 ' 34.0 29.0' 34.0 38.5 40.0 38.5 40.0 15 34.0 34.0 28.5 33.0 38.0 38.5 38.5 39.5 16 33.5 31.0 29.5 33.0 37.5 38.5 36.5 38.0 17 33.5 35.0 30.0 33.0 37.5 37.5 35.0 35.5 18 8

33.5 32.0 29.5 32.5 36.0 37.0 34.0 35.5 19-33.5 35.0 28.0 32.5 36.0 36.0 33.0 34.5 20 33.0 35.0 28.0 31.5 35.5 35.5 32.5 34.0 21 32.0 34.0 27.5 30.0 34.5 36.0 33.0 35.5 22 32.0 34.5 27.5 30.0 35.0 35.5 33.0 36.5 23 132.0 34.5 27.0 31.5 34.5 34.5 33.5 33.0 24 31.5 33.5 27.5 30.0 34.5 34.5 32.5 28.0 25 31.5 34.5 28.0 29.5 34.0 33.5 32.5 30.0 26

'31.0 33.9 28.0 28.5 34.0 33.5 32.0 30.5

~27 31.0 34.0 27.0 29.0 33.0 32.0 31.5 29.0 28 31.0 34.0 27.0 29.5 33.5 33.0 31.5 27.0 29

M). 5 32.5 26.0 28.5 33.0 32.5 31.5 28.0

X)

From Quenched End in 1/16ths ymm mmG SERVICES

i j' ,O :O O. O- 0 0: .

O- '

.0- O D Technical' Report .

~

TACf.E VIII' TR-4599-1:

J0MINY END-QvENCH REST 4TS

. NORMALIZING TEMP: 11700*F AUSTENITIZING TEMP: 1700 F

TEMPERING TEMP: 850 F-

4599-2-5-C- . . #36-C- #4599-1-2-C #45 99-1 C DISTANCE * . HRC' HRC HRC HRC HRC HRC HRC HRC BEFORE AFTER BEFORE- AFTER BEFORE AFTER 8EFORE AFTER

-TEMPER TEMPER TEMPER TEMPER ' TEMPER TEMPER o TEMPER TEMPER 11 49.0 39.5 50.5 41.0 57.5 42.5 50.0 42.0 2 53.0 43.0 51.0 .41.5 57.0 42.5 53.5 43.0 3 53.0 42.5 51.0 41.5 56.0 43.5- 55.0 42.0 4- 52.5 43.0- 50.0 40.5 55.5 44.5 54.0 44.0 5 51.0- 42.5 47.0' 40.5 55.5 44.0 52.5 44.0 6l 49.5 41.5. :43.5 37.5 56.0 44.0 50.5 44.0

7 :48.0 -40.5 40.5 31.5 57.0 45.0 48.5 43.5 E$

8 46.0' 42.0 37.5 34.0 57.0 44.0- 47.5 42.5 9 44.5 36.0 35.5 32.5 56.0 45.0 46.0 41.0

-10 42.5 37.0 32.5 32.0 -55.5 44.5 45.5 41.0 11- 41.0- 34.5 30.5 31.5 55.5 44.5 42.5 37.5

12 39.0 34.0 28.0 30.5 54.0 44.0 42.0 38.5 113 38.5 33.5 28.0. 28.0 52.5 43.0 41.0 38.5 14 37.0 33.5 28.5 23.5 51.0 42.0 40.0 38.0 15 36.5 30.0 28.0 27.0 50.5 40.0 39.0 38.0 16 36.0 30.5 29.0 28.5 44.5 37.5 39.0 37.5 17 35.5 33.5 28.5 27.5 42.5 39.0 37.5 37.0 18 36.0 33.5 28.5 27.5 41.5 37.0 37.0 36.0 19 35.5 33.5 27.5 27.5 41.0 37.0 36.5 35.5 20 35.5 32.5 27.5 28.0 41.0 36.5 36.0 35.0 21 34.5 32.5 27.0 28.5 40.5 35.0 35.5 31.5 22 '34.5 32.0 26.0 28.0 40.5 35.0 34.5 21.5 23 34.5 32.5 26.0 26.5 40.0 35.0 34.0 34.5 24 34.0 32.0 24.0 27.5 39.0 34.5 33.0 30.5 23 33.5 32.0 26.0 26.5 38.fi 34.0 33.0 30.5 76 33.0 31.5 25.5 27.5 36.0 34.0 32.5 29.0 27 27.0 32.5 25.5 26.5 34.0 33.5 33.0 27.0 28 26.0 31.5 -25.0 27.5 33.5 32.5 32.5 29.5 29 31.5. 32.0 26.0 26.0 33.5 30.5 33.5 27.5 30 32.5 30.5 26.0 26.0 32.0 30.0 34.0 28.u

From Quenched End in 1/16ths WTELEDYNE ENGNEERNG SERVICES

^

y .D. J -j C" lO 'O I O. O l0l O

. Technical Report, TABLE IX LTR-4599-li J0MINY7END-QUENCH RESULTS NORMALIZING TEMP: .1700*F AUSTENITIZING TEMP: 1700 F

. TEMPERING TEMP: 950 F

4599-2-5-D' #36-D #4599-1-2-D #4599-1-4-D

, DISTANCE *- 'HRC HRC- HRC HRC HRC- HRC HRC HRC BEFORE AFTER -BEFORE AFTER BEFORE AFTER BEFORE AFTER iEMPER TEMPER TEMPER TEMPER TEMPER TEMPER TEMPER TEMPER l' oS1.0 37.0- 48.0 37.5 52.5 39.0 53.5 37.0

2 50.0 38.0' 48.0 38.5 54.5 40.0 52.5 40.0 3 51.0- 39.5 47.5 38.5 54.5 40.0 51.0 39.5

. 4 51.0' 40.0 47.5 38.5 ,54.0 40.0 52.5 40.0 5 50.0 39.5 43.0 38.0 53.5 40.0 48.5 40.0 6' 49.5 39.5' 38.5 37.0 52.5 40.0 51.0 40.5 7 48.0' 39.0. 33.0 36.5 51.0 38.0 50.0 40.0 8- 46.0 38.5 32.0 35~.0 49.0 36.5 48.5 39.5 m 45.0 39.0

9 44.0 38.0 34.0 34.0 47.5 36.5 110 42.0 37.0 33.0 33.0 47.0 37.0 43.0 38.5 11 40.5 35.' 33.5 33.0 46.5 37.0 42.0 38.5 12 38.5- ' 35. . 133.5 32.5 45.0 34.5 43.5 37.5 13 37.5 34.5- 32.5 32.0 44.0 34.5 41.0 36.0 14 36.0 34.5 31.0 32.0 42.5 34.5 37.0 35.0 15 '34.5 33.5 31.5 31.0 43.0 33.0 33.0 34.5 16' 33.0 33.5 31.0 29.0 42.0 33.5 35.0 34.0 17 32.5 32.5 30.5 31.0 41.5 32.5 35.0 32.5 18' 31.0 33.0 30.0 30.5 41.5 32.0 35.0 32.5

'19 30.5' 33.0 29.0 29.5 41.0 32.5 35.0 33.0 20 29.5 33.0 29.0 29.5 41.0 32.5 34.0 32.5 21 29.5 32.5 29.0 29.0 41.5 33.5 34.5 32.0

-22 29.5 32.5 20.0 27.0 41.0 33.5 35.0 31.0 23 29.0 32.0 2 '.' . 0 27.0 41.5 32.5 34.0 32.5 24 30.0 32.0 27.0 26.5 40.0 33.5 33.0 31.5

5 2 30.5 31.5 27.0 24.5 37.0 32.5 32.0 31.0 26' 29.5 31.5 27.5 26.5 37.0 31.5 32.0 31.0 27- 29.0 31.5 26.5 25.5 36.5 31.0 31.5 30.5 28- 29.5 31.0 23.0 26.0 36.0 32.0 30.5 30.5 29 28.0 31.0 22.0 26.0 35.0 30.5 31.0 30.5 30 30.5 31.0 25.0 28.0 34.0 31.0 32.0 30.5

From Quenched End in 1/16ths ygg g gg

o a a D C U C O Technical Report TABLE X-A TR-4599-1 -J0MINY END-QUENCH RESULTS NORMALIZING TEMP: 1600 F AUSTENITIZING TEMP: 1550 F TEMPERING TEMP:

4599-1-6A #4599-1-6B #4599-1-6C #4599-1-6D HRC HRC HRC HRC DISTANCE

BEFORE BEFORE BEFORE BEFORE TEMPER TEMPER TEMPER TEMPER 52.0 50.0 55.0 52.5 1

50.0 54.0 55.0 2 52.0 51.0 51.5 53.5 51.0 3

52.0 53.0 51.0 4 51.5 51.5 51.5 51.5 5 51.5 50.5 50.5 52.5 6 50.5 48.0 50.0 49.0 49.5 7

49.0 47.0 52.5 no 8 46.5

45.0 47.0 46.0 52.5 9

43.5 44.5 44.0 51.5 10 43.5 42.5 49.0 11 42.0 40.5 42.0 42.0 47.0 12 40.0 40.5 40.5 42.5 13 37.5 14 39.0 39.0 39.5 37.5 39.0 40.0 15 38.5 37.0 38.5 41.5 16 37.5 40.0 17 37.0 36.5 37.5 36.5 37.5 39.5 18 36.0 38.0 19 36.0 36.0 36.5 36.0 36.0 37.5 20 35.0 35.5 21 35.0 35.5 35.5 35.5 35.5 36.0 22 35.0 34.5 23 34.5 35.5 34.5 35.0 33.0 35.5 24 34.0 37.0 25 34.0 35.0 34.0 34.0 34.0 36.0 26 33.0 36.0 27 32.5 33.5 33.0 33.0 33.0 36.0 28 31.5 37.0 29 31.0 32.0 33.0 31.0 33.0 37.0 30 28.0

From Quenched End in 1/16ths WTELED(NE ENGNEERE SERVICES

O+

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iTechni cal.:-Report TABLE'X-B-TR-4599-1 ' J0MINY END-QUENCH RESULTS

.i:0RMALIZING' TEMP: '1600*F AUSTENITIZING TEMP: 1550*F TEMPERING TEMP:

4599-2-6A #4599-2-6B' #4599-2-6C #4599-2-60 DISTANCE *' HRC' HRC HRC HRC

' BEFORE .- 'BEFORE 'BEFORE~ BEFORE <

TEMPER- TEMPER TEMPER TEMPER l '- 45.5- 54.5 54.0 45.0 2 48.0 56.6 56.0 '52.5 3 49.5 55.0 56.0 52.5 4 49.5: .54.0 54.5 50.5 5 46.0' 53.0 52.5 49.5

'6 49.0 53.5 49.5 49.0 7 48.0- 53.0 50.5. 47.0 m

.8 47.5- 50.5 48.5 44.5

'9 45.5' 47.5 45.5 44.5 43.0 45.5 41.5 45.0 10 11 41.5 44.5 42.0 44.5

12 39.5- 42.5' 40.0 43.0 13- 38.5 38.5 38.0 41.0 37.5 38.5 35.0 40.5

.14 36.0 38.0 35.0 39.0 15 35.0 38.5 35.0 37.5 16 17 34.0 '35.0 31.5 33.5 32.5 35.5

'18 33.0 36.5 19 33.0 35.0 .33.0 32.0 37.5 35.0 37.0 20 30.0- 37.5 34.5 36.5 21 28.0 35.0 29.5 37.0 22 23 26.0 30.0 31.5 36.0

-25.0 35.0 31.5 35.5 24 25.0 34.5. 31.5 35.0 25 23.0 34.5 32.5 34.5 26 23.0 35.0 32.5 34.0 27 22.5- 36.0 33.5 33.5 28 22.5 32.-5 33.0 32.5 29 23.0 34.5 29.0 31.5 30 WTELEDYNE ENGINEERING SEWICES

From Quenched End 1/16ths

O 'A'TELEDYNE ENGNEERING SEFNICES

.o Technical Report TR-4599-1 27 O Table XI Hardness of Tensile Specimen TE-2 Reading Hardness Reading Hardness Number

HRC Number

HRC 1 42.5 13 45.5 2 47.0 14 42.0 3 47.0 15 46.5 4 45.0 16 45.0 5 46.5 17 43.0 C) 6 44.0 18 44.5 7 46.5 19 43.0 8 48.0 20 44.0 9 44.0 21 44.0 10 -43.5 22 45.0 11 43.0 23 45.0 I3 12 43.0 24 45.0 25 43.0

1/8" incranents between readings starting at end nearest fracture.

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i-WTELED(BE Technical Report M TR-4599-1 28 O-Table XII Hardness Traverse Stud 36 Hardness Measured

Hardness Measured

Location this study Reported in 3887-1 13 1 43.8 41.3 2 41.7 42.8 3 42.5 43.6 4 43.8 43.9 5 46.2 45.1 Edge 6 47.7 33 7 46.9 (Edge)

Readings spaced % 3/6" apart from center to edge

,, ** Readings spaced s 1/4" apart from center to edge v

Longitudinal Hardness

' ' Traverse Stud 36 (Results 'from Froject 3887) u Location

Hardness (inches) (HRC)

1/4 47.5 L3 1/2 48 N'

3/4 49

! 1 48 l 1 1/4 48 1 1/2 48.5 l 'l 3/4. 48 le

"'3 2 48.5 2 1/4 48 2 1/2 49 l

2 3/4 47

! 3 50.5 3 '1/4 . 49.5 i g .- 3 1/2** 51.'0

from cut end towards top of stud

- hardness nearest the edge indicated in table at top of page q

~ J1 T. J( 71 ~~ ~h~ Tbf ~ r o~ ~ 2 0'. ~o' o o ...o. :o N.n$

4599-1-1 @E 4599-1-2 *O 4599-1-3 *[

4599-1-4 4599-1-5 $

a 4599-1-6 T

4599-1 2 1/2"4 1/2"3"4 1/2"4 1/2" 1/2" Threaded end 4599-2-5 ro 4599-2-6 End nearest Cut as received fracture by TES > 4599-1 7

4 1/2" 4 1/P."

I Figure 1 T Disection plan for Stud 35 Stud was received by TES in two pieces identified in this report as 4599-1 and 4599-2. Pieces cut from stud are identified by numbers indicated.

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Technical Report 48 0 - TR-4599-1 WT E L E D Y N E ENGINEERING SERVICES I 1 standard deviation on retempered specimens 46.O -

a AVC. HRC RFTER RETEMPERINC

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800 900 1000 600 700 RETEMPERING TEMPERATURE Figure 3a Hardness of Charpy Specimens after Re+.empering V-notch side

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Fihure 3b

. Hardness of Charpy Specimens after Retempering, outside

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f r Specim en #4599-1-6 10 - -

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Figure 17: Mount #AA-10 Magnification 200X Grain Size of 9 for Specimen 36 Since a 200x magnification.was used instead of 100x, grain size appears to be about 2 grain size numbers larger.

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l Grain Size of 10-11 for Specimen 4599-1-6 Since a 200x magnification was used instead of 100x, grain size appears to be about 2 grain size numbers

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Grain Size of 10 with some 9s for Specimen 4599-1 Since a 200x magnification was used instead of 100x, grain size appears to be about 2 grain size numbers o ,

larger.

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Since a 200x magnification was used instead of 100x, l grain size appears to be about 2 grain size nunters O larger.

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Teck-ical Report O TR-4599-1 52 WTT'1 FTWNE ENGNEERINGSERVICES

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magnified by 4x.

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IO l Technical Report 5A TR-4599-1 M M8 ;

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g Location on Diareter Figtm 29 Hardness Profiles of studs 35 & 36 .

'with new stud 3 Hardness-data (j . <-

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Technical Report TR-4599-1 6M O

.O O

lO APPENDIX I

.O l

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O Technical Report TR-4599-1 A-1 WM ENGNERNG SEMCES O Appendix I Stud Piece ID Description 36 3887-02 3/8" Thick Disk, O with Fracture Surface 36 3887-02 3 3/4" Long threaded cylinder w/ flats machined on two sides minor diameter:

2 1/8" O

36 3887-02 7/16" Thick Disk, 1 1/2" minor diameter used for hardness tests and chemical analysis

O 36 3887-401 Metallographic Specimen 35 3887-03 1 3/4" Long cylinder with flats machined on two sides, 2 1/2" minor diameter O 35 3887-03 6 Wedge shaped pieces 1 through 6 1" x 1" x 3/4", 1 1/4" long 35 3887-03 3/16" Thick Disk for hard-ness testing and chemical

'O analysis. One edge cut off, 2" minor diameter 35 3887-03 Fracture surface 3 3887-01 2 Pieces 1" x 1 7/8" x 3/4" O FCI broken fracture toughness specimen 3 3887-01 2 Pieces 1" x 1 7/8" x 3/4" FBI broken fracture toughness specimen J~'

3 3887-01 Fracture toughness specimen

- } 'I blank 2" x 1 7/8" x 3/4" 3 3887-01 Unused Charpy specimens CA-2 CB-2

.CA-1 CB-1 CC-1

'CC-2 a

O Technical Report TR-4599-1 yg A-2

)

~~

Stud Piece ID Description 3 3887-01 Unused Tensile specimens TE4 ^

TES

() TE6 3 3887-01 1/2" Disk 1/4" thick, used H for metallography, hardness and chemical analysis i

() 3 3887-01 Metallographic specimens 402, 403 404, 428 427, 429 3 3887-01 End of stud 3 3/16" thick C) F 3 3887-01 Used Tensile specimens TE3 TE2 TEl o'

3 3887-01 Wedge shaped quarters CC-1 00-1 AA-1 3/4" x 3/4" x 2 1/4" CC-2 DD-2 AA-2 CC-3 DD-3 AA-3 CC-4 DD-4 AA-4

)

3 3887-01 Wedge shaped quarters 8B-1 BB-3 1/2" x 1/2" x 2 1/4" BB-2 BB-4 3 3887-01 Fracture surface C) A 3 CE-3* CE-2 Broken Charpy specimens CD-3* CE-1*

CD-4* CD-1 CD-2* CD-5*

j CE-2 35 4599-1 2 lengths s 3' each 4599-2 7x

These specimens used 'for heat treating experiments

-

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