ML19326A359

Interim Deficiency Rept Re Tack Welding Performed by Unqualified Personnel at Grinnel.More Comprehensive Rept to Follow within 30 Days

ML19326A359
Person / Time
Site:	Davis Besse
Issue date:	01/18/1973
From:	Sampson G TOLEDO EDISON CO.
To:
Shared Package
ML19326A340	List: ML19326A349 ML19326A353 ML19326A359 ML19326A371
References
NUDOCS 8002030171
Download: ML19326A359 (19)

Text

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TOLEDO EDISON GLENN J. SAMPSON January 18, 1973 vie. ac..e.m.po..e Docket No. 50-346 Mr. Frank Kruesi, Director Directorate of Regulatory Operations Atomic Energy Commission Washington, D. C. 20545

Dear Mr. Kruesi:

Pursuant to requirements contained in 10 CFR 50.55 (e), The Toledo Edison Company submits the following interim report which will be followed within 30 days with a more comprehensive report:

During the fabrication of a significant number of ASME Section III, Class 2 and Class 3 piping spool pieces at the Grinnell-Kernersville, North Carolina shop, it was found that tack welding had been per-( ) formed by welders not qualified according to applicable Davis-Besse w_./ requirements.

Toledo Edison will receive from Grinnell a detailed summary of activities contributing to this significant deficiency, including the resolution and corrective actions taken to prevent recurrence.

This summary report will be made available to the Atomic Energy Commission within 30 days.

Yours very truly,,

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cc: Mr. Boyce H. Grier

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1 THE TOLEDO EDISON COMPANY EDISON PLAZA 300 MADISON AVENUE TOLEDO OHIO 43652 2 1946 -

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(O) v Investigaon of Steam Generator Weld Regards

1. Background .

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The steam generators for B6W nticlear steam systems were designed and fabricated in accordam.; with t.he requirencnts of & 1965 or 1968 editions of the ASME Code Section III, and appropriate addenda. The 1965 edition of Section III does not contain requirements for the mechanical testing of weld electrodes. How-ever, beginning with the 1966 winter addenda the Code requires that welding material certification include data relative to mechanical tests in addition to the chemical analysis previously required. The material properties are to be recorded and filed as permanent records.

A recent audit by B5W's Quality Control organization at Barberton, Ohio shcws that documentatioit is incomplete for certain lots of weld filler metal used in the fabrication of the steam generators for Oconee Units 1, 2 4 3; Three Mile Island Units 1 6 2; Crystal River Unit 3; Arkansas Nuclear One Unit 1; Rancho Seco; Midland Units 1 4 2; and Davis Besse,

.b As a result of this audit, an intensive investigation was conducted. This in-i vestigation has disclosed that the records are complete for all welds made by submerged arc and electroslag methods, These welding methods were used for the  !

major longitudinal and circumferential welds of the steam generators.

However, complete documentation has not been found for certain lots of weld electrodes used with the manual metal arc welding method utilized in repair ,

welds, weld pad buildups and some nozzle attachment welds. One of these lots has incomplete documentation of both chemical and mechanical properties. The remaining lots have satisfactory documentation of their chemistry but incom-plete documentation of mechanical properties. All of these lots were produced by the same methods used in the manufacture of electrodes of the same type that had been tested and found to have the required properties for nuclear I

construction.

This report provides the data necessary to justify the tensile strength and im-p pact properties of the electrodes having incomplete documentation. The justi-V fication is based upon comparing the known data from the lots havin;; incomplete documentation with corresponding data for the fully documented lots.

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2. Evaluation i: U A detailed review of all of the steam generator weld records has been completed.

The attached drawings show the location of welds in each affected steam generator made with the electrodes having incomplete documentation of the mechanical pro-perties. Table 1 lists, for each affected unit, the type and lot number of those electrodes for which mechanical properties were incompletely documented.  :

1 Each of the lots of the 7015 and 8015 type electrodes was manufactured in B6W's Electrode Shop. To obtain the datg necessary to justify the mechanical proper-ties of the filler material, a search was made for test certification data of similar electrodes manufactured by B6W during the last five years. This search resulted in the finding of seventy-three production lots of type 7015 and twenty-eight production lots of type 8015 electrodes which had been tested and documented as required for nuclear applications, The chemical analyses, tensile strengths, and charpy V-notch impact strengths (at +10 F,after stress relief at 1100 - 1150 F I.

for a minimum of 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />) are tabulated in Tables 2 and 3. The tables also in-clude the " Carbon Equivalent" which has been calculated by the equation...

CE = %C + 6

+ %CR 10 %7

%Ni

. (1)

The Carbon Equivalent is a measure of the hardenability of ferrous materials and is used to define the chemical limits of certain steels with respect to weld-ability. This Carbon Equivalent is commonly used for evaluating the strength of filler metals, and the data from Tables 2 and 3 were used to plot the tensile strength versus Carbon Equivalent as shown in Figures 1 and 2.

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V - (1) Stout, R. D. 6 Doty, W. D. "Weldability of Steels," Welding Research Council 1971 I ~. . _ . -- - - - - - - . _ - --- .. ...

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Tables 4 and 5 list the chemical analyses and Carbon Equivalents of the lots of 7015 and 8015 type electrodes for wfiich mechanical properties were incompletely documented. Whenusing the Carbon Equivalents of the lots of filler material listed in Tables 4 and 5 to determine the minimum expected tensile strength, as shown en Figures 1 and 2, it is evident that all lots with incomplete documen-tation exceed the minimum specified values shown on Figures 1 and 2 All of the charpy V-notch impact data shown in Tables 2 and 3 are expressed in ft - Ibs of energy absorbed at +10 F. The minimum impact strength pennitted ,

by specification at +40 F is 20 or 30 ft - lbs depending upon electrode type.

Since all of the data for type 7015 and 8015 electrodes exceed 45 ft - lbs, even at +10 F,it is evid,ent that the lots in question exceed the minimum specified strength by a considerable margin, Three lots of incompletely documented type 11018 filler metal were used for steam generator base metal and weld metal repairs. The data for these lots are shown

\a/ in Table 6. This type of filler metal is used in repairs which are quenched and tempered after the weld repair is made, and in order to qualify the filler metal fut this application, the weld test pad must receive a quench and temper heat treat: ment similar to that of the production weldments followed by a stress relief.

Table 7 presents in tabular form the tensile and impact data for specimens which have been quenched and tempered and then stress relieved for 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> at a tem-perature of 1100 to 1150 F. The minimum required tensile strength and impact values for this application are 70,000 psi and 20 ft - lbs at +40 F, respectively.

When comparing the data for the lots in question with the background data listed in Table 7, it is evident that these lots will exceed the minimum specified values.

Table 8 lists the chemical analyses and carbon equivalents of the seven lots of Type 7018 filler metal for which mechanical properties were incompletely documented.

Two of these lots were manufactured by BSW, and the remaining five were produced by two other filler metal vendors, Chemetron Corp. and Reid Avery Co. (RACO). The min-imum required tensile strength and impact values for type 7018 filler metal are 70,000 nei ed 20 ft . IhS at +40 F,recractively.

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D The e B5W lots, the Chemetron lot and FACO lot 10784, have weld metal chemistry that falls within the limits of the weld metal chemistry for Type 7015 filler metal as shown in Table 2. Een using the carbon equivalent of these lots of filler metal to detemine the minimum expected tensile strength from Figure 1, and when comparing the data on these lots with. the data in Table 2 for deter-mining expected impact strength, it is evident that the minimum tensile and im-pact requirements exceed the minimum specified values.

Two RACO lots, 93382 and 01972, differ in chemistry from typical 7018 electrodes by the lack of hb1vbdenum. A review of data on Type 7018 electrodes manufactured by subcontract vendors was made, and the chemistry, tensile strengths, carbon equivalents and impact data of these electrodes are tabulated in Table 9 Een comparing the two RACO lots, 93382 and 01972, with the data in Table 9 it is evi-dent that the minimum tensile and impact requirements exceed the minimum specified values.

One heat of 5/32" diameter RACO "S1S" class "E70SG" wire, heat # 661V009, had in-

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\ complete documentation of mechanical properties. This wire had the following chemical analysis...

0.09% C; 2.10% Mn; 0,024%P; 0.020%S; 0,47%Mo,

. which results in a Carbon Equivalent of 0.49.

. A search wasmadeof past records of similar wire used for Tungsten inert gas welding, and the results are presented in Table 10. This table shows the vendor certifica-tion of the wire and the B4W certification of the weld. The minimum required ten-sile strength and impact values are 70,000 pri and 20 ft - lbs at +40 F. Een the wira chemistry for heat 661V009 is compared to the data on Table 10 it is evident l that this heat will exceed the minimum specified values. l One lot of type 70A1 filler metal supplied by McKay, lot number 277T1804, had in-complete documentation of impact properties. This lot had the following chemical analysis...

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.066%C; 0.67%Mn; .01%Cr; .51%Mo; .12%Ni, which results in a Carbon Equivalent of 0.23. This material had a tensile strencth

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(/ of 81,750 psi after stress relief for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> at a temperature of 1100 - 1150 F. '

- The minimum required tensile strength and impact values are 70,000 psi and 20 ft -

lbs at +40 F. A search was made of past records of similar type 70A1 filler metal supplied by McFay and the results are presented in Table 11. When the data for Int :~~T1304 are rag ared to the data on Table 11, it is evident that this heat will exceed the minimum specified values.

One lot of Type 7018 filler metal had incomplete documentation of chemical and mechanical properties. This lot, number 51052A, was manufactured by RACO and was satisfactorily tested by BfM for impact properties after a 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> stress relief at a temperature of 1100 to 1150 F. Although complete certification has not been found for this lot, the vendor reports that the lot was manufactured to the standard chemical specifications for type 7018 filler metal and had an "as welded" tensile st:rength of 82,000 psi. A study of the "as welded" versus " stress relieved" tensile strength in Table 9 shows that the maximum reduction in tensile strength is less than 6,000 psi after a stress relief of 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> at a tempera-ture of 1100 to 1150 F. Thus, based on this study, it is evident that the lot will exceed the 70,000 psi minimum tensile strength requirement.

v In sumary, all of the filler metal having incc=plete docmentation is considered satisfactory and acceptable.

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3. Corrective Actions The following actions which have been taken by B5W will prevent a recurrence of the ci e tien...

1. All weld filler metal intended for use on non-nuclear components has been removed from the areas where the Commercial hbclear components are fabri-cated.

2. A review nas been made to assure that all of the nuclear weld filler metal currently in use has Been properly tested.

3. The system'for releasing weld filler metal to the nuclear shops has been revised to assure compliance with the testing requirements of the applicable specifications. A new weld filler metal release fonn is now in use. This form raust accompany the filler metal to the shops and it certifies that all of the required testing has been completed.

4 A listing of acceptable lots of weld filler metal will be available for use on the shop floor and during process upgrading. This listing will

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enable an in-process review of the acceptability of the lot numbers on Weld Control Records.

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l_ The data presented in Section 2 of this report assures the properties of the weld filler material which is incompletely documented. There-i fcre, the use of this material in tIie fabricativa of the steam generators does not affect the safety of the plant. The corrective actiors listed in Section 3 will prevent a recurrence of the situation disclosed in this report.

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TA8LE 1 10TS W1111 INColfLETE DOCUMENTATION 3 Oconee Oconee Oconee T?fI TN1 Crystal ANO . Rancho Midland Midland Davis Unli 1 Unit 2 Unit 3 Unit 1 Unit 2 River unit 1 - seco Unit 1 Unit 2 3....

Electrod - Unit 3 Type lot 8 lot 8 tot f lot # Lot f tot f lot # tot # lot f 14.t f lot 8 s 7015: 818-025248 818-026520 818-025653 818-025248 818-026520 818-026520 818-024726 818-027574 818-027 74 818-025690

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818 025653 818-025248 818-026520 818-023108 818-023108 818-025653 818-025690 818-025 90 818-025249

. 818-025653 8184126198 818-024726 818-021446 818-025249 818-026205 818-023108 818-026363 8015: 818-023004 818-023008 818-023006 - 818-026348 818-022105 818-022105 818-022778 818-023004 7018 51052A 818-024730 818-026931 818-026931 818-026931 93382 10784 10784 01972 42287201 1

110188 83272 212285 8D21827 E 70SC : 661V009 5

70A1: 277T1804 3...

TABLE 2 TYPE 7015 TEST CERTIFICATION BACKGROUND DATA Tensile Charpy Carbon Strength V - Notch

%Mn %Cr + % Mo %Ni Equivalent PST Ft-Lbs at +10 F.

.03% Carbon

.70 .57 .01 .205 82,270 86/105/106

.84 .55 .14 .23 82,500 84/84/97

.76 .66 .10 .23 80,250 53/66/74

.78 .55 .01 .215 76,000 105/108/133

.04% Carbon

.80 .48 .02 .22 81,500 74/92/102

.82 .55 .01 .235 82,500 69/71/118

.74 .60 .15 .225 79,500 80/87/94

.64 .57 .

.01 .205 84,000 92/97/110

.75 .59 .01 .225 81,000 100/122/150

.72 .55 .04 .215 85,500 55/58/76

.87 .57 .02 .24 78,500 95/100/105

.69 .57 .04 .21 76,500 45/55/60

.78 .63 .03 .21 78,250 135/180/185

(S .94 .52 .04 .25 87,500 108/110/125 t, ) .75 .63 .01 .23 78,000 100/101/102

' - ' ' .66 .55 .05 .205 79,000 89/92/101

.66 .56 01 .205 78,000 110/125/126

.78 .58 .11 .235 82,000 95/99/120

.70 .56 .01 .215 80,000 105/107/122

.68 .56 .06 .205 82,000 95/95/100

.77 .54 .01 .225 80,000 110/114/120

.72 .53 .01 .215 76,000 114/129/123

.67 .62 .05 .210 76,500 100/106/110

.89 .60 .12 .255 84,000 95/105/112

.7P .64 .12 .24 82,000 90/94/94

.78 .52 .01 .22 80,000 69/72/84

.98 .70 .11 .275 78,000 113/135/163

.77 .47 .01 .215 78,500 93/94/103

.81 .56 .01 .23 79,000 100/100/114

.69 .65 .03 .22 85,000 91/106/110

.72 .59 .04 .22 78,500 111/115/135 22 .58 .10 .245 85,000 65/81/84

.81 .58 .01 .235 81,000 88/91/107

.o9 .51 .01 .205 79,500 87/111/124 g

.82 49 .01 .23 79,250 105/117/119 05% Carbon

" .; 01 .225 ane

, 11' 1 /11'

.47 .01 .23 77,300 93/98/130

(}.81 1~~~,/ .A5 .51 .04 .24 78,500 09/05/103

.79 .62 .04 .24 77,000 100/103/122

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Tensile Charpy Carbon Strength V - Notch

%Mn %Cr + IMo %Ni Equivalent PSI Ft-Lbs at +10 F

.05% Carbon (Cont'd)

.98 .55 .01 .265 80,500 91/105/110

.92 .63 .04 .265 79,500 78/86/105

.80 .51 .06 .235 81,500 100/100/115

.82 .55 .01 .245 88,500 108/129/120

.72 .61 .03 .23 78,000 86/106/107

.82 .53 .01 .245 84,000 105/145/150

.66 .55 .01 .215 85,000 99/104/110

.78 .60 .01 .24 80,000 100/120/121

.70 .61 .04 .23 81,250 85/96/102

.76 .59 .02 .24 78,580 113/117/135

.78 .62 .04 .24 74,500 79/95/105

.72 .60 .06 .235 78,500 71/108/110

.82 .51 .

.02 .24 81,750 90/100/105

.81 .59 .06 .25 80,000 84/98/100

.84 .56 .09 .25 90,000 82/90/102

.81 .45 .01 .23 74,750 132/144/150

.82 .51 .05 .24 82,000 102/109/120

.72 .56 .02 .225 77,000 110/114/149 g -'s .82 .52 .03 .24 77,000 115/127/133

- (w/ ) .87 .54 .01 .25 81,000 123/127/137

.u6% Carbon i

.95 .54 .03 .275 85,500 77/85/95

.90 .54 .04 .265 79,500 109/115/121

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.81 .60 .04 .255 81,000 90/92/96

.74 .51 .01 .23 86,000 110/115/116

.84 .51 .03 .25 80,500 84/98/104  ;

.74 .49 .07 .235 82,000 115/120/137  :

.72 .53 .01 .235 78,000 106/120/125

.72 .66 .05 .25 80,750 86/102/105

.86 .47 .01 .245 83,800 84/90/110

.83 .61 .03 .27 77,500 103/108/120

.64 .50 .06 .225 78,000 75/85/88

.84 .48 .07 .255 75,000 70/107/118

.84 .50 .01 .25 84,250 108/110/110

.07% Carbon

.68 49 .01 .24 77,750 109/110/111

.70 .49 .02 .24 77,500 100/106/107 1

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\,. TABLE 3 TYPE 8015 TEST CERTIFICATION BACKGROUND DATA Tensile Charpy Carbon Strength V - Notch

%Mn TFr & *Mo *"I 'quivalent PCT Ft-Lbs at +10 F

.03% Carbon

.61 .55 .85 .225 86,000 91/95/95

.58 .48 .84 .22 82,000 100/101/149

.68 .58 1.01 .25 84,500 . 65/76/89

.04% Carbon

.65 .64 .87 .26 82,000 80/83/105

.79 .56 1.01 .275 87,500 88/90/100

.69 .62 .97 .265 84,750 99/105/105

.75 .61 .- .92 .27 87,500 70/84/75

.68 .48 1.04 .25 85,500 102/104/107

.82 .51 1.00 .28 86,000 84/92/95

.72 .51 .97 .26 85,000 109/117/120

.68 .49 1.01 .25 83,250 118/118/125 1.06 .58 .97 .33 85,000 90/91/96

.53 .49 .87 .225 86,000 65/90/91

.05% Carbon

.o1 .61 .82 .285 90,500 91/99/100 1.04 .53 .97 .325 FT ,500 95/100/103

.77 .45 .88 .27 84,000 94/96/111

. .90 .54 .90 .30 87,000 87/94/97

.82 .57 1.04 .295 83,000 94/103/105

.66 .61 1.10 .275 85,500 105/110/118 i -

. 86 .64 .92 .30 88,000 95/98/102

.64 .56 .90 .26 83,500 98/98/103

.94 .67 .95 .32 89,750 83/96/102

. .66 .44 .87 .25 84,000 105/119/120

.06% Carbon 4

.83 .65 .95 .31 85,500 109/110/112 75 47 .96 .28 86,000 95/95/110

.80 .54 1.05 .295 87,000 95/100/104

.07% Carbon 44 .52 1.20 .335 92,150 04/07/04 I

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s 'a TABLE 4 TYPE 7015 LOTS WITH INCOMPLETE DOCUMENTATION Carbon Lot # %C %Mn %Cr + %Mo %Ni Equivalent o18-026320 .03 .66 .50 ---

.19 818-025248 .02 .66 .41 ---

.17 818-025653 .05 .80 .45 ---

.225 818-023108 .05 .73 .52 ---

.22 818-026363 .05 .75 .51 ---

.225 818-026198 .03 .81 .62 --- .225 818-024726 .045 .65 .54 ---

.21 818-021446 .06 .77 .50 ---

.24 818-025690 .05 .72 .51 ---

.22 '

818-025249 .04 .81 .49 ---

.225 818-027574 .07 .69 .54 ---

.24 818-026205 .03 .81

.48 ---

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TYPE 8015 LOTS WITH INCOMPLETE DOCUMENTATION  ;

Carbon Lot # %C %Mn %Cr + %Mo %Ni Ecuivalent O 818-022105.08 .67 .55 .79 .285 818-023004 .043 .68 .61 .93 .26 818-023006 .049 .62 .52 1.15 .255 -

818-022778 .04 .77 .57 1.07 .28 l 818-023008 818-026348

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.54 .55 .92 .23 j 4

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.66 .55 .87 .25 ,

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TABLE 6 TYPE 11018 LOTS WIDI INCOMPLETE DOCUMENTATION i

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& Supplier _%j; %Mn %Cr + %Mo %Ni Eauivalent 8D21B27 (Arcos) .042 1.70 .45 2.16 .477 81272 (RACO) .08 1.39 .45 2.00 .455 212285 (McKay) .07 1.60 .40 1.60 .46 0 .

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TABULATION OF DATA ON VENDOR SUPPLIED LOTS OF TYPE 11018 FILLER METAL AND ON B&W PROCEDURE QUALIFICATIONS

- QUENCHED AND TEMPERED WELD METAL -

Supplier A Lot Number Tensile Charpy V-Notch or Carbon Strength Impacts at

%Cr + %Mo %Ni Eauiv. PSI +10 F PO Number %fi %Mn McKay 23785 .06 1.43 .55 1.59 .435 83,340 52/70/72/91 McKay 231285 .06 1.32 .43 1.69 .41 92,000 27/41/61/70 McKay 25185 .07 1.43 .53 1.69 .45 91,000 35/57/65/69 McKay 26785 .09 1.52 .64 1.60 485 96,000 29/32/34/41 McKay 27985 .07 1.36 .43 1.71 .43 90,000 95/96/99/110 McKay 261485 .08 1.37 .53 1.66 .445 98,000 25/34/49 PQ1830 85,800 9-1/4" Thick .08 15.8 42 1.62 .47 74/84/86/95/96 PQ 1255-C 8-1/4" Thick .09 1.48 .53 1.73 .48 89,860 30/35/35/74/74/78 PQ 1255-D 90,000 84/82/95/106 6-3/8" Thick .09 1.58 .55 1.52 .48 PQ 1804

• 67/70/80 7" Thick .10 1.52 48 1.74 .485 0,

• Base Metal (A516 Grade 70) Failed at 77,000 psi.

TABLE 8 TYPE 7018 LOTS WITH INCOMPLETE DOCU}ENTATION Carbon Lot # Source %J1 %Mn %Cr + %Mo %Ni Eauivalent 818-026931 B&W .04 .79 .53 --- .225 818-024730 B&W .05 .81 .49 --- .235 93382 RACO .07 .69 --- ---

.185

"$472 RACO .08 .81 --- --- .205 422B72100 Chemetron .05 .75 .53 --- .23 10784 RAC; .06 .62 .50 .25 .22 v]

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'Q TABULATION OF DATA ON VENDOR SUPPLIED LOTS OF TYPE 7018 FILLER. METAL Supplier, Lot Number, Tensile Charpy V-Notch Strength Impacts at

& Stress Relief C Mn Cr + Mo pST c.E. '10 7 Chemetron 06R891 48 hrs - 1125 F .08 1.04 .08 .26 80,500 141/153/159 .,

Chemetron 402A4081

48 hrs - 1125 F .08 .99 .09 .225 72,250 148/213/219 Chemetron 41229601 48 hrs - 1125 F .03 .89 .06 .235 71,500 239/239/240 i

Chemetron 650X171  !

48 hrs - 1125 F .09 1.18 .10 .30 73,500 133/160/201 McKay 421H8321

• 65 hrs - 1125 F .09 .89 .11 .25 74,000 110/130/237 .

McKay 422A8361 As Welded .05 1.12 ---

.20 77,000 --

48 hrs - 1125 F .05 .94 .03 .21 72,250 240+/240+/240+ ,

RACO 401W9661 50 hrs - 1125 F .06 .68 .03 .17 72,250 43/44 Murex 029B364 50 hrs - 1125 F .05 1.06 .10 .24 70,150 240/240/240 t

-- McKay L22987 '

As Welded .05 .90 .03 .205 77,000 ts 8 hrs - 1100 F ---

118.6 ( Avg.)

73,750 107.7 - 118.6 {

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50 hrs - 1125 F .07 .89 .04 .225 71,750

232/234/239 '

West 2076 $

As Welded .05 1.25 .23 .28 84,545 ---------------

50 hrs - 1125 F .06 1.35 .31 .315 82,000 71/78/78 ,

West 2171

'As Welded .04 1.20 .30 .27 80,160 - - - - - -

hrs - 1125 F .07 1.18 .20 .30 87,750 65/71/81 .

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TABLE 10 i TABULATION OF DATA ON VENDOR SUPPLIED LOTS OF E70SG WIRE f

Suppli;. Ten.*1e Charpy

! Wire Lot Condition Strength V-Notch

& Stre s Relief Tested JC[ %Mn %Cr + %Mo C.E. PSI at +10 F 1

RACO-3P1925 Wire .09 1.84 .42 .44 -------- ---------

1.83 .54 .45 89,300 85/85/86  : '

48 Hrs 1125 F Weld .06 Page 20712 Wire .11 2.01 .48 .495 -------- --

50 hrs 1125 F Weld .07 1.74 .54 .365 89,000 27/45/38

i' j RACO 5814 j ---

Wire .07 2.10 48 .47 --- ---------

48 hrs 1125 F Weld .07 1.50 .59 .38 89,500 40/42/52 I Page 70715 1 Wire .09 1.94 .50 .46 -------- -----

48 hrs 1125 F Weld .07 1.35 .58 .355 89,500 68/88/96 .

s_, Page 85146 Wire .10 1.91 .46 .465 -- --

50 hrs 1125 F Weld .05 1.50 .57 .555 92,700 55/57/59 Page 70748 '!

Wire .09 1.92 .48 .46 -------- ---- l 48 hrs 1125 F Weld .07 1.55 . 57 .385 88,000 50/65/78 !

Page 62234

--- Wire .10 2.06 .46 .485 -------- ------

48 hrs 1125 F Weld .07 1.94 .53 .445 93,120 45/56/96 Page 20717 ,

--- Wire .10 1.84 .47 .455 - - - - - - - - ---

55 hrs 1125 F Weld .09 1.40 .60 .38 89,000 63/65/76

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TABLE 11 TABULATION OF DATA ON MCKAY SUPPLIED LOTS OF TYPE 70A1 FILLER METAL (After Stress Relief of 48 - 65 Hours at 1100 - 1150 F)

Tensile Charpy V-Notch Strength Impacts at Lot Number C }gt er + Mo C.E. PSI +10 F 210T7025 .05 .86 .51 .24 79,750 97/99/100 328T4607 .06 .80 .60 .25 75,500 155/120/145 249T5422 .06 .78 .60 .25 78,500 95/121/122 252T2840 .06 .78 .64 .25 77,750 74/69/70 232T2511 .06 .75 .55 .24 78,500 80/85/84 308T4296 .07 .82 .61 .27 87,000* 92/81/84 291T1238 .07 .66 .67 .25 78,000 81/88/83 289T6098 .09 .80 .62 .28 87,000 69/62/62 210T7341 .09 1.00 .63 .31 83,000 100/100/110 217T0792 .. .09 .72 .56 .25 85,500 59/45/55 262T3119 .10 .70 .64 .28 76,060 87/91/112 232T2412 .10 - .86 .72 .31 89,000 45/45/39 l

I i

+

i i

i

• As welded tensile strength was 91,250 psi.

I.

z _

gm s s 100 95 f

.- 90 8

f'

, /. .

. .

, 80 s /  :

i.

, s -

~

f .- -

e /

j

- - - =

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L .

75 h__

m

=

'G 70 --- -- - -- - - - -- - - - - -- -

.E-Minimum Specified Tensile Strength 0.16 0.18 0.20 0.25 0.24 0.26 0.28 0.30 Carbon Equivalent i CE = % C + 5 Mn + % Cr + % Mo + % Ni 6 10 20 TENSILE STRENGTH VS CARBON EQUIVALENT FOR B&W TYPE 7015 ELECTRODES Figure i

O O O A

95 N. 90 W -

o #-

o 5 # . . -

- 33 e= .

g 80 _

U Minimum Specified Tensile Strength

_= 75 E

70 0.22 0.24 0.26 0.28 0.30 0.32 0.34 Carbon Equivalent CE = % C + % Mn + 5 Cr + % Fo + % Ni )

6 10 20 TENSILE STRENGTH VS CARBON EQUlV ALENT FOR B&W TYPE 8015 ELECTRODES Figure 2

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