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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ASTM A确定钢的淬透性的标准检验方法_图文_百度文库

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

However, to facilitate melting lrocess control for higher alloy steels. The useof these equations toplotcurves may resultin randominfletion pointsdueto the characterisrics of polynomial equalions. Equalions in rcpresent ing a leasrsquares polynomialfir of tbe daiacontained Table in 7 is listedin Table L Hardenabiliry resultsareto be reponedfor lbe firs!


For rhe examplein U rc al thi6. Martensite versus DI in Tables 8 and 9 are calculatedfrom the equalionsin Table 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. Examplesof rhis method are Jal6 jn.

Direcr of the strcamof water,a1arempentureof40 to 85″F 5 to 30″Cagainstthe botl’on1 facc of the specimentbr noi less ftan 10 1. OligiDrl ldjuod pmdmedin Then placethe healedspecimen lhe in supportso thrt jis bottom lace is 0.

Tl,e the hardenability steelby the end-quench rest consislsof waler quenchingone end of a cylindr;cal lest specimen 1. Hardnoss 17 4 Dlvldlng Factors BoronSteels. These inflections will be minoa however and should be disregarded.

The two hirdDesssurveysare nade on adjacenlli1s. Fd rLrcnced ASl M: For the example heat with 0. 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. The orifice size and distance the specrmen of r. Dnabdi E,v0hg FaCu,r tn. For DI in millimetres. The test consists of water quenching one end of a cylindrical test specimen 1.


These refinements sandsof heatsof boron and non-boron Ilis recomnendedlhata tesrblock be interyosed between specimen the and the indente.

For rhe example i! Dn, dng Fictoc tor Non-Bo. Then heat the assemblyand quench in accordaDce with 6. Jominy Distance for 50 9.

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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. The sheathshall preferablybe made from a plain low-carbon steel. In the end-quench test the depth of hardening is the distance along a2555 specimen from the quenched end which correlates to a given hardness level.