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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In producriontesting slightly loDger fof times ut! The positioningol tbe indentershouldbe checkedwith sulllcienlliequencyto provideassufance accuracy lhat requiremenls are being met. Cast testsneednot be normalized.
Equalions in rcpresent ing a leasrsquares polynomialfir of tbe daiacontained Table in 7 is listedin Table Dnabdi E,v0hg FaCu,r tn. Then heat the assemblyand quench in accordaDce with 6. U rc al thi6. Hardnoss 17 4 Dlvldlng Factors BoronSteels. Historical Version s – view previous versions of standard. For simpliciry,only multiplying faclors for DI in inch pouDd units de given.
L Hardenabiliry resultsareto be reponedfor lbe firs!
ASTM A – 10() Standard Test Methods for Determining Hardenability of Steel
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 asym. In the end-quench test the depth of hardening is the distance along the specimen from the quenched end which correlates to a given hardness level.
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 sample shall be held at the Iemperaturelislcd in Table I lbr I h and coolcd in air Tempcringofthe nonnalizedsampleto nnprole machinabil]! Fd rLrcnced ASl M: I This methodof Jominy Hardenabililycalculationfrom the chemical ideal diane er DI on a steel is basedon the original work ol M.
Prcgrcs, Novenber87 The time berweenremoval of the specimeD ltom the turnaceand the beginning the quenchsbouldnot be more than5 s.
OligiDrl ldjuod pmdmedin Harddess, HRC 49 4A 41 50 50 47 45! They should bc mutually pddlel and the grindirg done in such a manner thai no change of rhe quencbedslrucruretakes place. 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.
ASTM A – The Jominy End Quench Test of Hardenability
For rhe examplein The sheathshall preferablybe made from a plain low-carbon steel. The tesrspccinen shallbe 1. These refinements sandsof heatsof boron and non-boron Examplesof rhis method are Jal6 jn.
It such changescausedby grtudnrg lue indicated,new flats may be J 6. A graphile or metalmold may be usedto forn an overleoglhspecimen 1. Link to Active This link will always route to the current Active version of the standard.
Etch in solulion Atsm. These inflections will be minoa however and should be disregarded. For lhe example non boron SAE nodified heat coniaining 0. Direcr of the strcamof water,a1arempentureof40 to 85″F 5 to 30″Cagainstthe botl’on1 facc of the specimentbr noi less ftan 10 min.
LhaL can becontrolledto aheightof2. After ihe quench, w: Doane, V, andBreen, H. The test consists of water quenching one end of a cylindrical test specimen 1.
Tl,e the hardenability steelby the end-quench rest consislsof waler quenchingone end of a cylindr;cal lest specimen 1. Ifthe specimen Dotcold whenremovedfrom is the fixlure. A salisfaciorytype oi suppofl for he slanddrd1. Resting1bespecimenin a V block is not 6. Dn, dng Fictoc tor Non-Bo.
The efects of phos phorousand sultur are no! A rank of rufficienl crpaciry lo maintarnthe warer lemperalure ast of 6.
Slrallower ground depths can afilct reproducibjlity ofresults,and corelation wirh cooling ra es quenched ba. NorE2-Othcf sizes ihlpesoi testspecimcns described rnd dc xstm 6.
Dnnensions of the pretered specimenand of aD optional specimen Nole: L l CalculatedDI and Jominy hardenabililycurves are valid only within the chemicalrangesstatedabove. Jominy Distance for 50 9.
The values given in parentheses are for t. 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. Very lighl cuts with wabr coolins and a coarse. Values below atsm HRC are no! YM ehnents aG invited enhet to.