ML20067C193
| ML20067C193 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 09/22/1982 |
| From: | Shack W ARGONNE NATIONAL LABORATORY |
| To: | Lanksbury R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20067C185 | List: |
| References | |
| NUDOCS 8212080670 | |
| Download: ML20067C193 (3) | |
Text
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Attac nt 5 s
O ARCONNE NATIONAL LABORATORY 97)0Scx.4CassAru.Aacpce.1%60439 Teicku FF07bi:.3-r ser 3 her 2:, 1981 Mr. Roger Lacksbury U.S. Nuclear Reguistory Com=issie 799 Roosevelt Read Glen Elly=, IL 6013-
/..
SU3 JECT: Hardenss Tests on Assorted Spa:imt.s t
Dear Roger:
Eardness tests were parzo: sed to dete-.ine whether the =4terisi sa:p* as
~
met the mechanical regiremes:s of the a;;prepriaca A31'P. s;e:ificatisc.
scue cases the requirements i=cluda a _ini J.: and =axi=us tensile a:rs:sth, a minimum yield strength, and siniza:s alongatie: reg irements. These shecid be determined by usiaxial tensile tests. However, because of limitatic:s c: the amount of =aterial available hardcass ces s fferad the only scans :: es: :ata these properties. The relacionship betweec hard:ess and flev e::sss is well known (ode, e.g., F. McClintock a:d A. Argen, Me:hs:1eal Sehavior cf Materials).
Specinees were mousted a:d polished :: re:.:ve -50 mils cf the most severely defor=ed material frc the surface. Vickers hard: ass casts vare than performed using a 163* pyrsmid indenter vi:h a leadi:g force of 30 kg.
5,s=a exploratory tes:s showed that :he particular :hoter -f the loading foret had little effect on the measured hard:sss values.
iiagonal of the
~
~ 'ead frec impression d; was msured and the Vi:kars hard-V=P
- 1. 8 5 (.P (F kg, 4, t=)
8.1)
=
A, d,.
w A
I t
where P is the Icading feree and A the cc::act area.
he Meyer-Vi:kers l
C hardness M which is based ce the prej a::ed stea.g instaad of the cc::a::
y area AC"*'****
f x
ep v
F~7 = d'. = 0.927 kg/am' (2) 4 1
Since the Meyer-Vickers hardness gar.arally ts a te::er rep:ssenta:10: :f ::a average pressure :: the area of centact it was used c :::,. e the f;:v s:rtss S fret p
(.
O
(; S C g s e c T d E-<P g.
I',e i rc.w. y.kg AAm4 '.s r:r zi 4:.. '.: c.
8212080670 821124 PDR ADOCK 05000373 i
P PDR
2
/Y (3)
= 3.2 S.c f.-
The results are tabulated be;ev vith S ax;ressed i: the usual A ericar.
engineeringuni:sofksi(1kg/s*-1.422[si).
P.easured Eard: ass Flov Item ASIM Spacifics:ist.s*
Stress von w
-4 "V
$ F t
Plate ASTX A36 Tensile Streng:h
- 37 11.3
% ksi 58-80 ksi Minimus Yield 7:ir.t 36 ksi Bolt ASTM A307 Grade A Tensile Requirers:t 303 327 1/.5 ksi Wrr ksi
.,g
{l.Ab 3rine11 Harinass ha 121-241 zi: max g
5.,pk8 #
Rockve n Hardness 169-31C0 3
sin max l
i Nut ASTn A5c3 Grada A Proof ' oad Strass 203 219 97 isi
'l 68 ksi i
3rinall Hard:ess Sa1
- gg f
n6-302 sin _ax Rock'.rell Eard. ass
,(
363-C3" zin r.as Washer Ur.k=
.T.
%I
.((,
5 n
- g g3
- Farts of :he re:;uired specifica:1ces. Sea
s-us; 3 ck of.42TM S:endar.is" for full specifications.
- Vickers hardness, f.q. (1).
k
.'Meyers hard:ess, Eq. (2).
'14
( l '..
3 g /S" The flav stress obcaiced for the A36 p* ate is tonsistant with ths censile strensch requireme ts for this material. The requirece=ts for the belt and
/"'
nuc are given in terns of Erie:all hsrdness rather than Vicists hard:ess.
However, tha two are apprerisately equal; a ::re a:: crate cr=parise: cf the two hard:ess measurezents can be cbtainad free the ASP. Metals Eandhock. 7:1.
I p.1234 Accordi:5 to these res. tits:
Vickers is equivalect to 3rir. ash or Rockwell 303 237 3106 203 193 392 99 94 356 r
Thus the cut seecs to meet the hardness s;ecift:stics and the calculated f*.ev screes is consistent with the proof lead stress. Ecuever, the belt appears to exceed the hardness specificati:n which veuld ts d to reds a the toughness c the bolt. We have made seasurata ts ce the va.C. tr, but it is ces clear what specifications it should meet.
t I hope this 1: formation vill be of help t: you. As befere ths seasurements and ca3culations prese:ted here were actually perfer:ad by J. Y.
Park and D. Perkins.
i I
Sincerely,
,t
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- 11:ia= 2 0 =x y.aterials Science and Techtel:6'I Divi 8ict I
I WJS:d'an ec:
J. Y. Park D. Perkins R. W. '4eeks e
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