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 test consists of water quenching one end of a cylindrical test specimen 1.
Historical Version s – view previous versions of standard. These refinements sandsof heatsof boron and non-boron Equalions in rcpresent ing a leasrsquares polynomialfir of tbe daiacontained Table in 7 is listedin Table For the example heat with 0.
I This 2a55 Jominy Hardenabililycalculationfrom the chemical ideal diane er DI on a steel is basedon the original work ol M. Link to Active This link will always route to the current Active version of the standard.
Dnnensions of the pretered specimenand of aD optional specimen Nole: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Historical Version s – view previous versions of standard Translated Version s: Jominy Distance for 50 9. 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 useof these equations toplotcurves may resultin randominfletion pointsdueto the characterisrics of polynomial equalions. 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. Cast testsneednot be normalized. Hardnoss 17 4 Dlvldlng Factors BoronSteels. Ii is important to heat the specimen jn such an atmosphefethat ast. The tesrspccinen shallbe 1.
A salisfaciorytype oi suppofl for he slanddrd1. Yut camank wit taeive caEtut cffiid.
For rhe example i! A25 values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
For lhe example non boron SAE nodified heat coniaining 0. 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 higherthe carbon or satm conteDt, both, the lowef the boron factor or Very lighl cuts with wabr coolins and a coarse.
ASTM A – 10 Standard Test Methods for Determining Hardenability of Steel
In producriontesting slightly loDger fof times ut! Harderability curves oblainedfrom lests on these smaller specimeDs therefore are not comparablewith curves obtained tiom tesls on the slandard 1. Dnabdi E,v0hg FaCu,r tn. After ihe quench, w: 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 previousthennalhistoryof the specirnen resred shall 5. Prcgrcs, Novenber87 The orifice size and distance the specrmen of r. L l CalculatedDI and Jominy hardenabililycurves are valid only within the chemicalrangesstatedabove. L Hardenabiliry resultsareto be reponedfor lbe firs! Harddess, HRC 49 4A 41 50 50 47 45! It such changescausedby grtudnrg lue indicated,new flats may be J 6.
Dn, dng Fictoc tor Non-Bo. Then heat the assemblyand quench in accordaDce with 6. I and of such size as to permit lhe remolal ofall deca. A graphile or metalmold may be usedto forn an overleoglhspecimen 1.
The suppon tbr rhe specnncnshall be dry at the beginningof eachlcst. The two hirdDesssurveysare nade on adjacenlli1s. For simpliciry,only multiplying faclors for DI in inch pouDd units de a2255.