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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Very lighl cuts with wabr coolins and a coarse. Then placethe healedspecimen lhe in supportso thrt jis bottom lace is 0. Equalions in rcpresent ing a leasrsquares polynomialfir of tbe daiacontained Table in 7 is listedin Table L l CalculatedDI and Jominy hardenabililycurves are valid only within the chemicalrangesstatedabove.

The values given in parentheses are for t. ThenmakeRockwell hardness measurementson the C scaleon the specimen Fescribed in 6.

Harddess, HRC 49 4A 41 50 50 adtm 45! Prcgrcs, Novenber87 The previousthennalhistoryof the specirnen resred shall 5.

The higherthe carbon or alloy conteDt, both, the lowef the boron factor or The useof these equations toplotcurves may resultin randominfletion pointsdueto the characterisrics of polynomial equalions.

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The orifice size and distance the specrmen of r.

Direcr of the strcamof water,a1arempentureof40 to 85″F 5 to 30″Cagainstthe botl’on1 facc of the specimentbr noi less ftan 10 min. The procedure in p.

ashm Ifthe specimen Dotcold whenremovedfrom is the fixlure. The specnnen shnll bc nachined fiom a bar preliously normalized in accordrnce with 6. For DI in millimetres. The tesrspccinen shallbe 1.

Resting1bespecimenin a V block is not 6. Cast aa255 be normalized. Yut camank wit taeive caEtut cffiid. In producriontesting slightly loDger fof times ut! Tlresesmaller specjmens shall be testedin accordance witb 5 of the method exceptlhat modilicatjons requiredin the waler streams are for queDching.

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Values below 20 HRC are no! After the Woodsmetal is nohen, screwthe stud in place so lhat the specimen is lorced nrmly against the bonom of the hole. The sample shall be held at the Iemperaturelislcd in Table I lbr I h and coolcd in air Tempcringofthe nonnalizedsampleto nnprole machinabil]!

In casesof lack of reprodlcibility or of dillerencesbetweenlaboratories, indenterspacingshould be measu. 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 suppon tbr rhe specnncnshall be dry at the beginningof eachlcst.

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Then heat the assemblyand quench in accordaDce with 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.

The Certified Material Test Report shall state the method of hardenability determination. For rhe example i! In the end-quench test asym depth of hardening is the distance along the specimen from the quenched end which correlates to a given hardness level. Referenced Documents purchase separately The documents listed below sstm referenced within the subject standard but are not provided as part of the standard.

ASTM A确定钢的淬透性的标准检验方法_图文_百度文库

Link to Active This link will always route to the current Active version of the standard. Dnabdi E,v0hg FaCu,r tn. The efects of phos phorousand sultur are no!

A graphile or metalmold may be usedto forn an overleoglhspecimen 1. Hardnoss 17 4 Dlvldlng Factors BoronSteels.