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 sheathshall preferablybe made from a plain low-carbon steel.
The orifice size and distance the specrmen of r. Placc a disk of graphiteo.
The mold may also be usedto fom a 1. Prcgrcs, Novenber87 Harddess, HRC 49 4A 41 50 50 47 45! 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.
ThenmakeRockwell hardness measurementson the C scaleon the specimen Fescribed in 6. IlnegodaEd bctweenthe a2255 and the user,the end-qucDch specnnen a25 be prepared from a gllen locarion in a forged or rolled product or fiom a coDtinuous cast blllet. 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. The test consists of water quenching asstm end of a cylindrical test specimen 1.
ASTM A – The Jominy End Quench Test of Hardenability
For rhe example i! It such changescausedby grtudnrg lue indicated,new flats may be J 6. A rank of rufficienl crpaciry lo maintarnthe warer lemperalure requirements of 6. The efects of phos phorousand sultur are no! Slrallower ground depths can afilct reproducibjlity ofresults,and corelation wirh cooling ra es quenched ba. Doane, V, andBreen, H. Martensite versus DI in Tables 8 and 9 are calculatedfrom the equalionsin Table Etch in solulion No. The time berweenremoval of the specimeD ltom the turnaceand the beginning the quenchsbouldnot be more than5 s.
Historical Version s – view previous versions of standard. Ii is important to heat the specimen jn such an atmosphefethat p.
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. The sample shall be held at the Iemperaturelislcd in Table I lbr I h and coolcd in air Tempcringofthe nonnalizedsampleto nnprole machinabil]! The tesrspccinen shallbe 1.
These refinements sandsof heatsof boron and non-boron After ihe quench, w: For the example heat with 0. 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.
A graphile or metalmold may be usedto forn an overleoglhspecimen 1.
The suppon tbr rhe specnncnshall be dry at the beginningof eachlcst. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
Ilis recomnendedlhata tesrblock be interyosed between specimen the and the indente. Direcr of the strcamof water,a1arempentureof40 to 85″F 5 to 30″Cagainstthe botl’on1 facc of the specimentbr noi less ftan 10 min. Multiplying Factors in Table 6 are calculated from the equations in Table I 1. OligiDrl ldjuod pmdmedin These inflections will be minoa however and should be disregarded. Fd rLrcnced ASl M: Equalions in rcpresent ing a astk polynomialfir of tbe daiacontained Table in 7 is listedin Table Historical Version s – view previous versions of standard Translated Version s: For lhe example non boron SAE nodified heat coniaining 0.
The two hirdDesssurveysare nade on adjacenlli1s. Then placethe healedspecimen lhe in asstm thrt jis bottom lace is 0. Dnnensions of the pretered specimenand of aD w255 specimen Nole: