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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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.

These inflections will be minoa however and should be disregarded. Dnabdi E,v0hg FaCu,r tn. 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.

After ihe quench, w: ThenmakeRockwell hardness measurementson the C scaleon the specimen Fescribed in 6.

ASTM A确定钢的淬透性的标准检验方法_图文_百度文库

In producriontesting slightly loDger fof times ut! 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.

Cast testsneednot be normalized. In the end-quench test a525 depth of hardening is the distance along the specimen from the quenched end which correlates to a given hardness level. L l CalculatedDI and Jominy hardenabililycurves are valid only within the chemicalrangesstatedabove. The mold may also be usedto fom a 1.

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Examplesof rhis method are Jal6 jn. YM ehnents aG invited enhet to. The efects of phos phorousand sultur are no!

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The specnnen shnll bc nachined fiom a bar preliously normalized in accordrnce with 6. Resting1bespecimenin a V block is not 6.

In casesof lack of reprodlcibility or of dillerencesbetweenlaboratories, indenterspacingshould be measu. Yut camank wit taeive caEtut cffiid. After the Woodsmetal is nohen, screwthe stud in ast, so lhat the specimen is lorced nrmly against the bonom of the hole.

Direcr of the strcamof water,a1arempentureof40 to 85″F 5 to 30″Cagainstthe botl’on1 facc of the specimentbr noi less ftan 10 min. The two hirdDesssurveysare nade on adjacenlli1s. It such changescausedby grtudnrg lue indicated,new a525 may be J 6. The positioningol tbe indentershouldbe checkedwith sulllcienlliequencyto provideassufance accuracy lhat requiremenls are being met.

Dn, dng Fictoc tor Non-Bo.

ASTM A – 10() Standard Test Methods for Determining Hardenability of Steel

I end-quench hardenability hddenabiliqr i luned DI DI: The time berweenremoval of the specimeD ltom the turnaceand the beginning the quenchsbouldnot be more than5 s. Ifthe specimen Dotcold whenremovedfrom is the fixlure. Very lighl cuts with wabr coolins and a astk. It is measured quantitatively, usually astj noting the aa255 or depth of hardening of a standard size and shape of test specimen in a standardized quench. Then heat the assemblyand quench in accordaDce with 6.

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Placc a disk of graphiteo. A rank of rufficienl crpaciry lo maintarnthe warer lemperalure requirements of 6.

For DI in millimetres. They should bc mutually pddlel and the grindirg done in such a manner thai no change of rhe quencbedslrucruretakes place. For rhe examplein Historical Version s – view previous versions of standard.

The tesrspccinen shallbe 1.

The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. For simpliciry,only multiplying faclors for DI in inch pouDd units de given. For lhe example non boron SAE nodified heat coniaining 0. Etch in solulion No. Hardnoss 17 4 Dlvldlng Factors BoronSteels. Doane, V, andBreen, H.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. I and of such size as to permit lhe remolal ofall deca. Values below 20 HRC are no! Multiplying Factors in Table 6 are calculated from the equations in Table I 1.

For the example heat with 0. Dnnensions of the pretered specimenand of aD optional specimen Nole: