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. I end-quench a2555 hddenabiliqr i luned DI DI: The previousthennalhistoryof the specirnen resred shall 5. ThenmakeRockwell hardness measurementson the C scaleon the specimen Fescribed in 6.

L Hardenabiliry resultsareto be reponedfor lbe firs! LhaL can becontrolledto aheightof2. I This methodof Jominy Hardenabililycalculationfrom the chemical ideal diane er DI on a asttm is basedon the original work ol M.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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

For simpliciry,only multiplying faclors for DI in inch pouDd units de given. The procedure in p.

The useof these equations toplotcurves may resultin randominfletion pointsdueto the characterisrics of polynomial equalions. Placc a disk of graphiteo. It aastm measured quantitatively, usually by noting the extent or depth of hardening of a standard asmt and shape of test specimen in a standardized quench. Fd rLrcnced ASl M: These refinements sandsof heatsof boron and non-boron Dnabdi E,v0hg FaCu,r tn. Values below 20 HRC are no! Ilis recomnendedlhata tesrblock be interyosed between specimen the and the indente.


The sheathshall preferablybe made from a plain low-carbon steel.

For DI in millimetres. The positioningol tbe indentershouldbe checkedwith sulllcienlliequencyto provideassufance accuracy lhat requiremenls are being met.

YM ehnents aG invited enhet to. Dn, dng Fictoc tor Non-Bo. 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 atsm specnnen may be prepared from a gllen locarion in a forged or rolled product or fiom a coDtinuous cast blllet.

The two hirdDesssurveysare nade on adjacenlli1s. For the example heat with a2555.

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The sample shall be held at the Iemperaturelislcd in Table I lbr I h and coolcd in air Tempcringofthe nonnalizedsampleto nnprole machinabil]! A graphile or metalmold may be usedto forn 100 overleoglhspecimen 1.

The orifice size and distance the specrmen of r. Multiplying Factors in Table 6 are calculated from the equations in Table I 1. Jominy Distance for 50 9. They should bc mutually pddlel and the grindirg done in such a manner thai no change of rhe quencbedslrucruretakes place. However, to facilitate melting lrocess control for higher alloy steels. Link to Active This link will always route to the current Active version of the standard.


After the Woodsmetal is nohen, screwthe stud in place so lhat the specimen is lorced nrmly against the bonom of the hole.

The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Harderability curves oblainedfrom lests on these smaller specimeDs therefore are not comparablewith curves obtained tiom tesls on the slandard 1.

Direcr of the strcamof water,a1arempentureof40 to 85″F 5 to zstmagainstthe botl’on1 facc of the specimentbr noi less ftan 10 min. The values given in parentheses are for t.

Yut camank wit taeive caEtut cffiid. In casesof lack of reprodlcibility or of dillerencesbetweenlaboratories, indenterspacingshould be 01. The higherthe carbon or alloy conteDt, both, the lowef the boron factor or For lhe example non boron SAE nodified heat coniaining 0. OligiDrl ldjuod pmdmedin The test consists of water quenching one end of a cylindrical test specimen 1.

Examplesof rhis method are Jal6 jn. L l CalculatedDI and Jominy hardenabililycurves are valid only within the chemicalrangesstatedabove.