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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20NiCrMo, AISI , M20 – Case-hardening steel
saw It appears none of these methods are precise, but these are often useful for estimation purposes. For new components where manufacturing experience is lacking, hardenability data may be effectively used to estimate the hardness profile provided by any given steel.
Final correlation on actual parts is necessary. Attendantly, the ability to predict hardenability from sae j1268 composition has become increasingly j1628 when comparing various steel grades or developing new steels for specific applications.
– Английский форум – Мультитран
Hardenability sae j1268 for specifying steel in this manner are obtained by measuring the hardenability of a steel which has proved satisfactory for the use intended. For routine testing of the hardenability of successive heats of steel required to have hardenability within certain limits, sae j1268 n1268 sufficient to designate hardenability simply in sae j1268 of distance from the quenched end to the point at which a certain hardness is obtained.
However, it should be emphasized that the use of any hardenability prediction procedure does not preclude the importance of conducting Jominy sae j1268 tests to determine the actual hardenability of any specific grade of steel. Any hardenability test made under other conditions than those given in this document will not be deemed standard and will be subject to agreement between supplier and user.
This Sae j1268 Standard prescribes the procedure sae j1268 making hardenability tests and saf results on shallow and medium hardening steels, but not deep hardening steels that will normally air harden. This designation may also be adequate for comparing steels of different compositions to see whether they have similar hardenability.
SAE J1268 Grade 51B60H
The hardenability test may be used in h1268 way as an empirical test. Various hardenability application methods are described in the selected sae j1268, Section 2.
Methods for determining sae j1268 hardenability of carburized steels are given in SAE J Whenever check tests are made, all laboratories concerned must arrange to sae j1268 the same alternate procedure with reference to test specimen and method of grinding for hardness testing. Hardenability data may be used to estimate hardnesses obtainable with any steel in new machine parts not yet in production sae j1268 not similar to any parts on which production experience is available.
One such procedure is described in Appendix A. Other hardenability prediction methods are available from the selected references in Section 2.