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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SAE J1268 Grade 4820H
For new components where manufacturing experience is lacking, hardenability data may be effectively used to estimate the hardness profile provided by any given steel. However, it should be emphasized that the saw of any hardenability prediction procedure does not preclude sae j1268 importance of conducting Jominy end-quench tests to determine the actual hardenability of any specific grade sae j1268 steel.
Final correlation on actual parts is necessary.
Attendantly, sae j1268 ability to predict hardenability from chemical composition has become increasingly important when sae j1268 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.
Hardenability limits for specifying steel in this manner are obtained by measuring the sae j1268 of a steel which has proved satisfactory for the use intended. Whenever check tests are made, all laboratories concerned must arrange to use the same alternate procedure with reference to test specimen and method of grinding for hardness sae j1268.
One swe procedure is described in Appendix A.
The hardenability test may be used in this way as an empirical test. Any sae j1268 test made under other conditions than those given in this document will not be deemed standard and will sae j1268 subject to agreement between supplier and user.
15B21 H SAE :: Total Materia
Hardenability data may sae j1268 used to estimate hardnesses obtainable with any steel in sae j1268 machine parts not yet in production and not similar to any parts on which production experience is available.
Ase for determining case hardenability of carburized steels are given in SAE J This SAE Standard prescribes the procedure for sae j1268 hardenability tests and recording results on shallow and medium hardening steels, but not deep hardening steels that will normally air harden. Various hardenability swe methods are described in the selected references, Section 2.
For routine sae j1268 of the hardenability of successive heats of steel required to have hardenability within certain limits, it is sufficient to designate hardenability simply in terms of distance from the quenched end to the point at which a aae hardness is obtained. This designation may also be adequate for comparing steels of different compositions to see whether they have similar hardenability.
Other hardenability prediction methods are available from the selected references in Sae j1268 2.