ASTM A255 10 PDF

Originally Standard ASTM Hardenability Charts (81⁄2 by 11 in. pads of 50 charts) are approved in Last previous edition approved in as A – Purchase your copy of ASTM A – 10() as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards. Offering fast and affordable ASTM A Jominy End Quench Test of Hardenability along with heat treating and metallurgy expertise.

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The higherthe carbon or alloy conteDt, both, the lowef the boron factor or The sample shall be held at the Iemperaturelislcd in Table I lbr I h and coolcd in air Asym nonnalizedsampleto nnprole machinabil]! Then heat the assemblyand quench in accordaDce with 6. However, to facilitate melting lrocess control for higher alloy steels.

It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. The sheathshall preferablybe made from a plain low-carbon steel.

For rhe example i! The previousthennalhistoryof the specirnen resred shall 5. For rhe examplein For the example heat with 0.

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Jominy Distance for 50 9. Hardnoss 17 4 Dlvldlng Factors BoronSteels. The specnnen shnll bc nachined fiom a bar preliously normalized in accordrnce with 6. A rank of rufficienl crpaciry lo maintarnthe warer lemperalure requirements of 6. L l CalculatedDI and Jominy hardenabililycurves are valid only within the chemicalrangesstatedabove.


Yut camank wit taeive caEtut cffiid. These inflections will be minoa however and should be disregarded. U rc al thi6. For simpliciry,only multiplying faclors for DI in inch pouDd units de given.

ASTM A – 10() Standard Test Methods for Determining Hardenability of Steel

A graphile or metalmold may be usedto forn an overleoglhspecimen 1. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. This may be accompljshedby herting the specimen a vertical posilion in x contaiDer in with an elsily removable coler containingx layer ofcrst iron chips wilh the bottonr face of rhe specimen resiing on lhe chips.

ThenmakeRockwell hardness measurementson the C scaleon the specimen Fescribed in 6. IlnegodaEd bctweenthe supplier and the user,the end-qucDch specnnen may be prepared from a gllen locarion in a forged or rolled product or fiom a coDtinuous cast blllet.

Cast testsneednot be normalized. The values given asstm parentheses are for t. LhaL a25 becontrolledto aheightof2.

Historical Version s – view previous versions of standard. NorE2-Othcf sizes ihlpesoi testspecimcns described rnd dc in 6.

ASTM A – 10 Standard Test Methods for Determining Hardenability of Steel

The Certified Material Test Report shall state the method of hardenability determination. The mold may also be usedto fom a 1. Dnabdi E,v0hg FaCu,r tn. Then placethe healedspecimen lhe in supportso thrt jis bottom lace is 0. Prcgrcs, 187 After the Woodsmetal is nohen, screwthe stud in place so lhat the specimen is lorced nrmly against the bonom of the hole.


For lhe example non boron SAE nodified heat coniaining 0. The procedure in p. Etch in solulion No.

Tlresesmaller specjmens shall be testedin accordance witb 5 of the method exceptlhat modilicatjons requiredin the waler streams are for queDching. I and of such size as to permit lhe remolal ofall deca. A facsimile of the slandard ASTM hardenability chanr on which lypical hardenabilily curves atsm is shown in Fig. Slrallower ground depths can afilct reproducibjlity ofresults,and corelation wirh cooling ra es quenched ba. The useof these equations toplotcurves may resultin randominfletion pointsdueto the characterisrics of polynomial equalions.

Resting1bespecimenin a V block is not 6. Dnnensions of the pretered specimenand of aD optional specimen Nole: Ilis recomnendedlhata tesrblock be interyosed between specimen the and the indente.