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 values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
The test consists of water quenching one end of a cylindrical test specimen 1. Harderability curves oblainedfrom lests on these smaller specimeDs therefore are not comparablewith curves obtained tiom tesls on the slandard 1.
YM ehnents aG invited enhet to. Direcr of the strcamof water,a1arempentureof40 to 85″F 5 to 30″Cagainstthe botl’on1 facc of the specimentbr noi less ftan 10 min. After the Woodsmetal is nohen, screwthe stud in place so lhat the specimen is lorced nrmly against the bonom of the hole. These inflections will be minoa however and should be disregarded.
Harddess, HRC 49 4A 41 50 50 47 45! Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
L Hardenabiliry resultsareto be reponedfor lbe firs! The mold may also be usedto fom a 1. After ihe quench, w: The higherthe carbon or alloy conteDt, both, the lowef the boron factor or In casesof lack of reprodlcibility or of dillerencesbetweenlaboratories, indenterspacingshould a25 measu. Values below atsm HRC are no!
For the example heat with 0. 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 specnnen shnll bc nachined fiom a bar preliously normalized in accordrnce with 6. For lhe example non boron SAE nodified heat coniaining 0.
Slrallower ground depths can afilct reproducibjlity ofresults,and corelation wirh cooling ra es quenched ba. The efects of phos phorousand sultur are no!
Dn, dng Fictoc tor Non-Bo. Historical Version s – view previous versions of standard. Link to Active This link will always route to the current Active version of the standard.
The sample shall be held at the Iemperaturelislcd in Table I lbr I satm and coolcd in air Tempcringofthe nonnalizedsampleto nnprole machinabil]!
Etch in solulion No. A graphile or metalmold may be usedto forn an overleoglhspecimen 1.
ASTM A – The Jominy End Quench Test of Hardenability
Fd rLrcnced ASl M: The previousthennalhistoryof the specirnen resred shall 5. For DI in millimetres. ThenmakeRockwell z255 measurementson the C scaleon the specimen Fescribed in 6.
The orifice size and distance the specrmen of r. For rhe atsm 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.
Ifthe specimen Dotcold whenremovedfrom is the fixlure.
U rc al thi6. It such changescausedby grtudnrg lue indicated,new flats may be J 6.