SAE J Revised MAY 3. Chemical Composition Limits—To permit steel producers the necessary latitude to meet the standard hardenability limits, the. 1 May Buy SAE J Hardenability Bands For Carbon And Alloy H Steels from SAI Global. MIL-SPEC SAE A H A H MIL-S J H A H MIL-S J H A H MIL-S .
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However, it sae j1268 be emphasized that the use of any hardenability prediction procedure does not preclude the importance of conducting Jominy end-quench tests to determine the actual hardenability of sae j1268 specific grade of steel.
SAE-J | Hardenability Bands for Carbon & Alloy H Steels | Document Center, Inc.
Final correlation on actual parts is necessary. Methods for determining case hardenability of carburized steels are given in Sae j1268 J Any hardenability test made under other conditions than those n1268 in this document sae j1268 not be deemed standard and will be subject to agreement sae j1268 supplier and user. Attendantly, the ability to predict hardenability from chemical composition has become increasingly important when comparing various steel grades or developing new steels for specific applications.
It appears none of these methods are precise, but these are often useful for estimation purposes. This SAE Standard prescribes the procedure for making hardenability tests and recording results on shallow and medium hardening steels, but not deep hardening steels that will normally air harden. Hardenability data sar be used to estimate hardnesses obtainable with any steel in new machine parts not yet in production and not similar to any parts on which production experience is available.
Other hardenability prediction methods are available from the selected references in Section sae j1268.
SAE J Grade H Steel – Matmatch
Whenever check tests are made, all laboratories concerned must arrange to use the same alternate procedure with reference to test sae j1268 and method of grinding for hardness testing. This designation may also be adequate for comparing steels of different compositions to see whether they have similar hardenability.
For routine testing of the hardenability of successive heats sae j1268 steel required to have hardenability sae j1268 certain limits, it is sufficient to designate hardenability simply in terms of distance from the quenched end to the point at which a certain hardness is obtained. The hardenability test may be used in this way as an empirical test.
Various hardenability application methods are described in the selected references, Section sae j1268. One such procedure is described in Appendix A. For new components where manufacturing experience is lacking, hardenability data may be effectively used to estimate the hardness profile provided by any given steel. Hardenability limits for specifying steel sae j1268 this manner are obtained k1268 measuring the hardenability of a steel which has proved satisfactory for the use intended.