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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YM ehnents aG invited enhet to. After the Woodsmetal is nohen, screwthe stud in place so lhat the specimen is lorced nrmly against the bonom of the hole. A facsimile of the slandard ASTM hardenability chanr on which lypical hardenabilily curves havebeenploted is shown in Fig. Tlresesmaller specjmens shall be testedin accordance witb 5 of the method exceptlhat modilicatjons requiredin the waler streams are for queDching.

ThenmakeRockwell hardness measurementson the C scaleon the specimen Fescribed in 6. L l CalculatedDI and Jominy hardenabililycurves are valid only within the chemicalrangesstatedabove. The previousthennalhistoryof the specirnen resred shall 5. The specnnen shnll bc nachined fiom a bar preliously normalized in accordrnce with 6. 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.

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 time berweenremoval of the specimeD ltom the turnaceand the beginning the quenchsbouldnot be more than5 s. Martensite versus DI in Tables 8 and 9 are calculatedfrom the equalionsin Table It such changescausedby grtudnrg lue indicated,new flats may be J 6. The tesrspccinen shallbe 1.


For the example heat with 0. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The suppon tbr rhe specnncnshall be dry at the beginningof eachlcst. The higherthe carbon or alloy conteDt, both, the lowef the boron factor or They should bc mutually pddlel and the grindirg done in such a manner thai no change of rhe quencbedslrucruretakes place.

Harderability curves oblainedfrom lests on these smaller specimeDs therefore are not comparablewith curves obtained tiom tesls on the slandard 1.

Very lighl cuts with wabr coolins and a coarse. The efects of phos phorousand sultur are no! The useof these equations toplotcurves may resultin randominfletion pointsdueto the characterisrics of polynomial equalions. Then placethe healedspecimen lhe in supportso thrt jis bottom lace is 0. Yut camank wit taeive caEtut cffiid. Link to Active This link will always route to the current Active version of the standard. Direcr of the strcamof water,a1arempentureof40 to 85″F 5 to 30″Cagainstthe botl’on1 facc of the specimentbr noi less ftan 10 min.

L Hardenabiliry resultsareto be reponedfor lbe firs! Ii is important to heat the specimen jn such an atmosphefethat p. Ifthe specimen Dotcold whenremovedfrom is the fixlure. For simpliciry,only multiplying faclors for DI in inch pouDd units de given.

NorE2-Othcf sizes ihlpesoi testspecimcns described rnd dc in 6. Harddess, HRC 49 4A 41 50 50 47 45! Doane, V, andBreen, H. Historical Version s – view previous versions of standard Translated Version s: The Certified Material Test Report shall state the method of hardenability determination.


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

Cast testsneednot be normalized. For DI in millimetres.

OligiDrl ldjuod pmdmedin Multiplying Factors aetm Table 6 are calculated from the equations in Table I 1. I This methodof Jominy Hardenabililycalculationfrom the chemical ideal diane er DI on a steel is basedon the original work ol M.

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In casesof lack of reprodlcibility or of dillerencesbetweenlaboratories, indenterspacingshould be measu. Ilis recomnendedlhata tesrblock be interyosed between specimen the and the indente. Fd rLrcnced ASl M: Examplesof rhis method are Jal6 jn. 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.

Values below 20 HRC are no! These refinements sandsof heatsof boron and non-boron Jominy Distance for 50 9.

Tl,e the hardenability steelby the end-quench rest consislsof waler quenchingone end of a cylindr;cal lest specimen 1. The two hirdDesssurveysare nade on adjacenlli1s. I and of such size as to permit lhe remolal ofall deca.

The sheathshall preferablybe made from a plain low-carbon steel. Equalions in rcpresent ing a leasrsquares polynomialfir of tbe daiacontained Table in 7 is listedin Table Slrallower ground depths can afilct reproducibjlity ofresults,and corelation wirh cooling ra es quenched ba.

However, to facilitate melting lrocess control for higher alloy steels.

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