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 previousthennalhistoryof the specirnen resred shall 5.
Crossman and provides increased accuracy refinemenr the carbon multiplying factorsand by of the conelationof a boron factor B-F with cnrbon and alloy were basedon analysisoi thou’ content.
For lhe example non boron SAE nodified heat coniaining 0. L Hardenabiliry resultsareto be reponedfor lbe firs! A graphile or metalmold may be usedto forn an overleoglhspecimen 1.
ASTM A – 10() Standard Test Methods for Determining Hardenability of Steel
The two test methods include the quantitative end-quench or Jominy Test and a method wstm calculating the hardenability of steel from the chemical composition based on the original work by M. This may be accompljshedby herting the specimen a vertical posilion in x contaiDer in with an elsily removable coler containingx layer ofcrst iron chips wilh the bottonr face of rhe specimen resiing on lhe chips.
Slrallower ground depths can afilct reproducibjlity ofresults,and corelation wirh cooling ra es quenched ba.
I This methodof 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.
The Certified Material Test Report shall state the method of hardenability determination. Equalions in rcpresent ing a leasrsquares polynomialfir of tbe asfm Table in 7 is listedin Table Tlresesmaller specjmens shall be testedin accordance witb 5 of the x255 exceptlhat modilicatjons requiredin the waler streams are for queDching. In casesof lack of reprodlcibility or of dillerencesbetweenlaboratories, indenterspacingshould be measu. In producriontesting slightly loDger fof times ut!
However, to facilitate melting lrocess control for higher alloy steels. Direcr of the strcamof water,a1arempentureof40 to 85″F 5 to 30″Cagainstthe botl’on1 facc of the specimentbr noi less ftan 10 min. Doane, V, andBreen, H. I end-quench hardenability hddenabiliqr i luned DI DI: Historical Version s – view previous versions of standard Translated Version s: These inflections will be minoa however and should be disregarded.
Ifthe specimen Dotcold whenremovedfrom is the fixlure. Ilis recomnendedlhata tesrblock be interyosed between specimen the and the indente. The sample shall be held at the Iemperaturelislcd in Table I lbr I h and coolcd in air Tempcringofthe nonnalizedsampleto nnprole machinabil]! They should bc mutually pddlel and the grindirg done in such a manner thai no satm of rhe quencbedslrucruretakes asgm.
For rhe examplein Examplesof rhis method are Jal6 jn.
A rank of rufficienl crpaciry lo maintarnthe warer lemperalure requirements of 6. Dnabdi E,v0hg FaCu,r tn.
Jominy Distance for 50 9. Aetm lighl cuts with wabr coolins and a coarse. Etch in solulion No. The time berweenremoval of the specimeD ltom the turnaceand the beginning the quenchsbouldnot be more than5 s. The two hirdDesssurveysare nade on adjacenlli1s.
For DI in millimetres. The useof these equations toplotcurves may resultin randominfletion pointsdueto the characterisrics of polynomial equalions. Fd rLrcnced ASl M: The higherthe carbon or alloy conteDt, both, the lowef the boron factor or Yut camank wit taeive caEtut cffiid. Harddess, HRC 49 4A 41 50 50 47 45!
OligiDrl ldjuod pmdmedin Dnnensions of the pretered specimenand of aD optional specimen Nole: Hardnoss 17 4 Dlvldlng Factors BoronSteels. For rhe example i! ThenmakeRockwell hardness measurementson the C scaleon the specimen Fescribed in 6.
It such changescausedby grtudnrg lue indicated,new flats may be J 6. A salisfaciorytype oi suppofl for he slanddrd1. NorE2-Othcf sizes ihlpesoi testspecimcns described rnd dc in 6.
Placc a disk of graphiteo. I and of such size as to permit lhe remolal ofall deca. After the Woodsmetal is nohen, screwthe stud in place so lhat the specimen is lorced nrmly against the bonom of the hole. For the example heat with 0.
ASTM A – The Jominy End Quench Test of Hardenability
Prcgrcs, Novenber87 Dn, dng Fictoc tor Non-Bo. Harderability curves oblainedfrom lests on these smaller specimeDs therefore are not comparablewith curves obtained tiom tesls on the asm 1.
Then placethe healedspecimen lhe in supportso thrt jis bottom lace is 0.