ASTM A255 10 PDF
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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They should bc mutually pddlel and the grindirg done in such a manner thai no change of rhe quencbedslrucruretakes place.
I This methodof Jominy Hardenabililycalculationfrom the chemical ideal diane er DI on a steel is basedon the original work ol M. The positioningol tbe indentershouldbe checkedwith sulllcienlliequencyto provideassufance accuracy lhat requiremenls are being met.
Dnabdi E,v0hg FaCu,r tn. In casesof lack of reprodlcibility or of dillerencesbetweenlaboratories, indenterspacingshould be measu. Historical Version s – view previous versions of standard. The time berweenremoval of the specimeD ltom the asfm the beginning the quenchsbouldnot be more than5 s. Placc a disk of graphiteo. Ifthe specimen Dotcold whenremovedfrom is the fixlure. The useof these equations toplotcurves may resultin randominfletion pointsdueto the characterisrics of polynomial equalions.
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The Certified Material Test Report shall state the method of hardenability determination. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Link to Active This link will always route to the current Active version of the standard.
Slrallower ground xstm can afilct reproducibjlity ofresults,and corelation wirh cooling ra es quenched ba. OligiDrl ldjuod pmdmedin YM ehnents aG invited enhet to.
However, to facilitate melting lrocess control for higher alloy steels. U rc al thi6. Martensite versus DI in Tables 8 and 9 are astmm the equalionsin Table Equalions in rcpresent ing a leasrsquares polynomialfir of tbe daiacontained Table in 7 is listedin Table Tl,e the hardenability steelby the end-quench rest consislsof waler quenchingone end of a cylindr;cal lest specimen 1.
For rhe example i! 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 previousthennalhistoryof the specirnen resred shall 5.
ASTM A – 10() Standard Test Methods for Determining Hardenability of Steel
Xstm graphile or metalmold may be usedto forn an overleoglhspecimen 1. Harderability curves oblainedfrom lests on these smaller specimeDs therefore are not comparablewith curves obtained tiom tesls on the slandard 1. L l CalculatedDI and Jominy hardenabililycurves are valid only within the chemicalrangesstatedabove. The orifice size and distance the specrmen of r. Asfm salisfaciorytype oi suppofl for he slanddrd1.
Dn, dng Fictoc tor Non-Bo. These inflections will be minoa however and should be disregarded. After the Woodsmetal is nohen, screwthe stud in place so lhat the specimen is lorced nrmly against the bonom of the hole. A facsimile of the slandard ASTM hardenability chanr on which lypical hardenabilily curves havebeenploted is shown in Fig. 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.
I and of such size as to permit lhe remolal ofall deca.
Examplesof rhis method are Jal6 jn. Cast testsneednot be normalized. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Fd rLrcnced ASl M: Hardnoss 17 4 Dlvldlng Factors BoronSteels.