UNCLASSi FIED

AD.29 7 325

ARMED SERVICES TECHNICAL INFO ON AGCYAR"NGTON HALL STATIONARLINGTON 12, VIRG-NIA

UNCLASSIFIED

NOTICE: When govenment or other dri gs, speci-fications or other data are used for any purposeother than in connection with a definitely relatedgovernment procurement operation, the U. S.Government thereby incurs no responsibility, nor anyobligation whatsoever; and the fact that the Govern-ment may have forzialated, furnished, or in any waysupplied the said drawings, specifications, or otherdata is not to be regarded by implication or other-wise as in any mamner licensing the holder or anyother person or corporation, or conveyin any rightsor permission to manufacture, use or sell anypatented invention that may in any way be relatedthereto.

a ENIiEiR$AL bYNAMIcal! CONVAIR

LLJ ",-

ER Report No. 8926-09,5

Material Welding Electrodes Metal ArcSmithway SW-151 (A. 0. Smith Corporation)

Weld Strength and Ductility After 1-eat Treatment

T. J. Koppernal, H. C. Turner, W. M. Sutherland

cm ~ 10 JTune 1957 MA 6 1963

TJSf

Published and Distributedunder

Contract AF 33(657)-8926

Post Office Box 1950, San Diego 12, California CYpress 6-6611

Material Post Office Box 2071 BRoadway 3-_000 Accounting Post Office Box 510

bATE__.RPPD

Report No. 8926-095

Mater~ial Welding Electrodes Metal ArcSflithway SW l51 (A. 0. Smith Corporation)

Weld Strength Aad Ductility After Heat Treatment

Abstract

SAE 4130 steel plates 1/4, 3/8 arid 1/2 inch thick Were double 'Y' chain-fered with 1/16" lands on the edges to be welded. SAE 4130 steel Ilte1/8 inich thick were Squared preparatory to Welding. The steel plates

wer wede Wih /8 inch diaee Smtwy 151 (A. 0. Smith Corporati(~,Milwaukee, Wiscon~sin), As folloWs: 1I/8anai 1/4 inch thick, two passes,one from each side; 3/8 and 1/2L Inich thick) four passes, two from eachside. After welding,, all test specimens were heat treated as foll1ows:1600*F one hour, oil quench, 83 0 or 10006F one hour, air cool. Tension,benid and shear testing subsequent to heat treatment showed the weldscapable of developing satisfactory strengh in10000 psi (830 0 F temper)and 175,000 psi (lO 0 F060 temper) ranges. -Those welds heat treated to the150,000 Psi range displa-yed satisfactory ductility, but those heat treatedto the 175,000 psi range appeared to be somewhat brittle.

Reference: Koppernal, 'T. J, Turner, H. C., Sutherland, W. M.,-"Evaluation Tests of~ 1/8 Smithway SW-151 Electrodes,"

General Dynamics/Convair Report MP 56-660, San Diego,California, 10 June 1.957. (Reference attached).

01" 4s84 mwasl....... If- I--.I.J --0-

ST RucnLuS-ja=~IuALS LABOHATORn

C-- 0 N V A I RREPOR T. -56- 6-60-

ADIVISION OF GIENER AL DYNAMICS CORPOR AtION - AE - 6-40o 57-

SAN DIEMO MDL______

TITLE

0EUR-kQ-J2-EVALUATIMOSS- UF-1/8-"-3ILffirAY

PRIEPARED BY *GROUP -MAThiRIAIS-4& P9OMSM-ES .

REFERENCE__________

C-HECED YAPPROVED BYIs -- 1.4.strong,f

Gru Ingineer Chief of Test LaboratoriesNO. OF PAGES 1

NO. OF DIAGRAMS 7

REVISIONS

M. DATE By CHANGE PAGES APPECTED

roo is A-

ANALYIS C O N V A I R PAGE I

PR"PAR1D BY Koppenaul/Turner * PIN"" e 90uRA RE'RT NO. 56-660CHECKED BY Suth.. rlnd SAN DIEO MODEwL. P-106AREVISED BY DATE 6-10-57

EVALU.,TC014 TESTS OF 11611 SMUL.WAYSW-151 ELEM'RVDES

The object of this test was to qualify the use of &mithway SW-151 elec-trodes for production improvement and to establish an additional source ofsupply Vor electrodes that will respor satin', ctorily to heat treatments forhigher strength levels.

1. The electrode can be heat treated to the 150 KS1 and 175 X(1 ranges.

2. Welded joints heat truukted to 150 KS1 showed good ductility values.

3. The 175 KSI heat treatment appeared to embrittle the weld-bise metal

interfaces.

Smithway SW-151 electrodes, 1/8" in diameter, were used throughout thistest. The composition of this electrode is equivalent to AISI type 502 stain-

less steel. SAE 4130 steel plates of 1/8"p 1/", 3/8" and 1/2" thicknesses wereemployed as the b ,se metals.

The 1/4", 3/8" and 1/2" thick plates were double "V" chamfered with 1/l"

lands on the edges to be welded; the 1/8" material was not chamfered. The1/8" rnd 1/4" panels were welded in two passes, one pass on ech side. The

. 3/8" and 1/2" panels were welded in four passes, two passes on each side.

After heat treatment, tensile ad oend test specimens were milled from thepanels as seen in Figur,- 1. All weld benids were ground flat.

Fillet Weldine

Dimensions of the "standard" fillet weld specimens are shown in Figure 2;Figure 4 shows the dimensions of the double shear specimens. Welds in the 1/8"and 1/4" plate were mf.ie with one pass along each side. The 3/8" and 1/2"material wrs wVded with two passes along ezch side.

After hat tre-ttment, mill cuts were uchined in the specimens as seen inFikUres 2 and 4.

All welding (butt fr £illet) w s 'accomplished in the Experimental Factoryby a certified weldor.

rOom I1-A

A iRPAEsAMI 6 CompOIAIIOMRE6R

SAN CIEGOMDLFOAODTE -l0.5

Reat -Treatin

All spcin~swere hat trted in the Engine-erin~g Test L-Jboratory u~ng

a controlled ataospi er (dissociLAtea S)i~a.n r..ua .

S~cLerswc~re austernitize-3 at l6JQOF. for one hour anc oil quenched.Appropriate Specimen~s wer~e terqjprei oxne hour at -3OuF and, 1UO0-,i, for the175 K51 and 15u KSI ranbes, res,'eotively. The speOimeeBs were not normalizedor stress relieved prior to heat treatment6

Rockwell "lC" hardness readings were made on the weld and two inches from*s~ch side of the weld on all butt welded samples, and one inch from the weldon all fillet welded samples.6

All- other testing wag accomplished ont a 120,000 lo. Baldwin4outhiwarktesting machine.

Retestin

Because of the high strength levels attained in the 1/4" and 1/8W buttwelded tensile samples, additional samples of the original heat treated 1/4" and3/80 panels were retempered using the same temperature and holding time. Thesesampled were tested as discussed above.

RESULTS AN~D DISCUSSION:

The results of the tensile, bend and shear test's are shown in Tables it III$and IV$ respectively. Table Il contains the results of the retests on the 1/4%

ad3/8" butt welded tensile coupon.

The ultimate tensile strengths indicate that the electrode can be heattreated to the 150 IZI and 175 KSI ranges. The samples heat treated to the 1-50KSI rage showed good elongation values but the samplea at 175 KIU except forthe 1/8" sapples, displayed poor elongaio aus h eeto the 1/4"and 3/8, samples (processed with a second temper eqi~valent to the original tempr

di ot show any great change in values. Inasmuch as al fte14 38" and-O/2 tensil -1 npe hette-tdt 15i had poor el r-ation values withfailures takin~g place in the weld or at the weld-base metal In-terface, it can beconcluded that the 175 IKSI ha~t treatment introduces a very brittle wel n/aweld-mbase metal interface.e

dA/o

The bend test showed that the bend ductility of -the 1/811 samples wassigniftcantly greater than the 1/4" s amples. All of' the 1/4" s am-ple

failed at the weldowbase metal interface even thoughte14 ape lnaemore than the 1/8N sampls It solasobnteththe eongation on the

,pleM Itsoudalo'D otdthtt

ANALYSIS C O0N V A I RPAGE3PREPAREDt mY Kopjen%,tl/Ta-ner A SIMONS Of SHUIAL DYNAMIcS CORPONAI@ REapo NO56-6 W-CHteCKE my Suth :rllnd SAN DIRGO MODELF4O16REVISD MY DAE6-io-5?

fiS-ULTS-UN .-D!SQSI!Uh-: ('Ont 'a.)

weld of te !/4", s alples was g rea±ter than on the 1/8" samples. These datawould indicate th-at the ved- c'ental interfice was resp~onsible for the pool'ductility of the welded joints.,

The shear sampleas howei J'tisfactory r, sults. The low strength of th~e 1/2"Shear samples an~d the double si~ear samples can De attributed to the low hardness,This was probably caused by over-tempering.

~~j: The d:~ta from which this report w- ,s preparea cran be found inEngineering 'rest Liborutories N'otebook 991.,

"Mod 9126

ANALYSIS C O0N VA IR 'PAGE

PREPARED My Kopfperm 4,./Turne-r A W.INioN 00 41fnSAL ObYMIUCS COSPORAfIlU mt y 566uOCHECKED MY ;Sutherland IGOMDL1OA

REVISED by DATE 6-10-57

wzSf, 0' Thick 4/1.0 (Wshow4~

W' 6" b 7~ Tbic 413m (5 an~d 6 omiwd)e~

FY-6U4RE / &I/TT WELD T"r-3T PAIVEL $.78IF-PCIMEN PO 17T/CV

A#UR /$

PORN 1018A

ANALYING C 0 N V A I Rt PAGE 5PREP-ARED BY Kopj.-enaal/Turtner A mime. wD 613m" OvuAm coaPouneso RISPOm No. 56-.660CEmCKED my 3lutherland SAN 61960 mODEcLF-10 6ARElt flyE BY AtE 6410-57

r1FI RE e aS/A cL F btPJPOMNLESlaS

WEW -00 'P--

IV'

7 -

Zn?#eial Set to Approxc. -RO~ A 6.ve

,~es iiU

ANALYSIS C O0 N V A IR PAGE 6PREPrARED .i-(oppenai 1l/Turner A SIMON 00 SIURRAL DYNMICS COUPOOATION '.&*N. 56-660

cmacitotsyluthrl-nd SN DEGOMODEL F406ARe VISD 1w DATER 6-10-57

~C90 Z-4

El34ISk

CONVAIR Report i-om. 5&-6U0)SAN 0119GO

Fo0tM 7 TA8LE. 5;rRZ--N6T1 OF 6(ITT WELDS IN' 44V/ STEL~/&/GJW - 5/1 ELEC TROPE S

_____ -Hf ,,a-t WSld Aqh ____ / -- _

-__-/0 _ _33,6 96o4 AAAe __/M, 00d & i 4

/5 R 2- .919 / 0 0

__J_ --_ -- ---Oo 3 ~ 6 0 _ _ . ' _

- _ /75 330 lo 3 0 / ~9 75 41'

/7-r

PC_ 50 4 2 A.6 39 2e Id e- &4

*~4+4 /5 3e Art~? 9 i

CONVAIR ileport ,oi 5660

FORM, 13 --- AN- 0DI1GO/TI8L 4 E_- kE7 T E-, 5- T- 0, 81-'7 -WELLS

40

_ _ _ __ _ ~___ __ _ _ __ 4 _-- ____v

___ ____ _____ _ __ _____ __ __ __ __ __ 75v

__ 04 04yjQK/ 'A* ee

*CONVAIRk Repurt No. 56-6t,OSAN D1900TOA7 A5LEM Z A'E BEIW DICM77Y IN 4/10

.5 7TErl- VSJ/A/ 3W-/5l (LEtC rA'00E

- ogm'L AcaL. -ize --- A#- ~ Aa F/61& ILA"- ~i

______ e~~~iti~. .~~L.... ....... el EA? _ __ W /#

- -AL-

_ _ /76 3 . 4 44e? 142.2 7 7 491

- I0

7- -4- -5

- ,y - e IH

- --- - ------

-ONVAIN Fe 10

CANVID0 Rleport I.o. 5:6-b6W

IST&E& I-ERS -T,9-EN 6 T7/1- IN/ 4/130S T74 E L USIN65- SW -/5/ ELEC TAODES-

- 2r~et ~ L ... i/e&-f Adch-a/l-40a btfeLSS,~ Sdea, #v4 ic

- ~ 4 1- 48 ' ~ ) T_ ___

_ ____ - ~ 118 7700 1~4 _3 0~

_____~.10 ____ ___ A$& 2s o

//9.77 720 ~~O 6-0041

_____ -- 4'_ _ .78 -2 -4 AP0O ~ s

- - 50 30 ~86 /$2~024300 600___

____~ - - - -/5 .53 /60/ . 4._ _ _ _ w le_ .48 Z-78 / f.Ro A /.5 o _ 4 1 R o 216.

__ 246 /4f x4Of~

4~kI

00 210046 ~ -' ~ ~ ~ ~ _ _

- iii ~ 1~L .4 ASS -4126 7A

_ (i)S F/6 E52 4S- OAPAv4 vo'P/*4 1

_____ (7 O~ 'T AW4. 4 &' 7MV 0 14C 140 .