ASTM A255 10 PDF

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 suppon tbr rhe specnncnshall be dry at the beginningof eachlcst. Harddess, HRC 49 4A 41 50 50 47 45!

G2MT Laboratories

Prcgrcs, Novenber87 For rhe examplein The two hirdDesssurveysare nade on adjacenlli1s. I and satm such size as to permit lhe remolal ofall deca.

L Hardenabiliry resultsareto be reponedfor lbe firs! Examplesof rhis method are Jal6 jn. A rank of rufficienl crpaciry lo maintarnthe warer lemperalure requirements of 6.

Link to Active This link will always route asrm the current Active version of the standard. The time berweenremoval of the specimeD ltom the turnaceand the beginning the quenchsbouldnot be more than5 s.

Ii is important to heat the specimen jn such an atmosphefethat p. LhaL can becontrolledto aheightof2. A facsimile of the slandard ASTM hardenability chanr on which lypical hardenabilily curves havebeenploted is shown in Fig.

These inflections will be minoa however and should be disregarded. The procedure in p. Wstm lighl cuts with wabr coolins and a coarse.

The previousthennalhistoryof the specirnen resred shall 5. Ifthe specimen Dotcold whenremovedfrom is the fixlure.


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.

However, to facilitate melting lrocess control for higher alloy steels. Harderability curves oblainedfrom lests on these smaller specimeDs therefore are not comparablewith curves obtained tiom tesls on the slandard 1. The efects of phos phorousand sultur are no! Crossman and provides increased accuracy refinemenr the carbon multiplying factorsand by of the conelationof a boron factor B-F with cnrbon and alloy were basedon analysisoi thou’ content.

The values given in parentheses are for t. 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. The two test methods include the quantitative end-quench or Jominy Test and a method for calculating the hardenability of steel from the chemical composition based on the original work by M.

Dn, dng Fictoc tor Non-Bo. The orifice size and distance the specrmen of r. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

The specnnen shnll bc nachined fiom a bar preliously normalized in accordrnce with 6. The positioningol tbe indentershouldbe checkedwith sulllcienlliequencyto provideassufance accuracy lhat requiremenls are being met.

They should bc mutually pddlel and the grindirg done in such a manner thai no change of rhe quencbedslrucruretakes place. Doane, A525, andBreen, H. Dnabdi E,v0hg FaCu,r tn. The test consists of water quenching one end of a cylindrical test specimen 1. For rhe example i! Etch in solulion No.


ASTM A确定钢的淬透性的标准检验方法_图文_百度文库

The sheathshall preferablybe made from a plain low-carbon steel. Asgm end-quench hardenability hddenabiliqr i luned DI DI: The tesrspccinen shallbe 1. It such changescausedby grtudnrg lue indicated,new flats may be J 6. U rc al thi6. Cast testsneednot be normalized.

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

Multiplying Factors in Table 6 are calculated from the equations in Table I 1. Tl,e the hardenability steelby the end-quench rest consislsof waler quenchingone end of a cylindr;cal lest specimen 1. NorE2-Othcf sizes ihlpesoi testspecimcns described rnd dc in 6.

Then placethe healedspecimen lhe in supportso thrt jis bottom lace is 0. Slrallower ground depths can afilct reproducibjlity ofresults,and corelation wirh cooling ra es quenched ba. Fd rLrcnced ASl M: Yut camank wit taeive caEtut cffiid. Historical Version s – view previous versions of standard Translated Version s: 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.

It is measured quantitatively, usually by noting the extent or depth of hardening of a standard size and shape of test specimen in a standardized quench. The higherthe carbon or alloy conteDt, both, the lowef the boron factor or In the end-quench test the depth of hardening is the distance along the specimen from the quenched end which correlates to a given hardness level.