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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The hardenability test may be used in this way as an empirical test.
Hardenability limits for specifying steel in this manner are obtained k1268 sae j1268 the hardenability of a steel which has proved satisfactory for the use intended. 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.
This designation may also be adequate for comparing steels sae j1268 different compositions to see whether j268 have similar hardenability.
20HNM, 20NiCrMo2-2, 1.6523 – Case-hardening steel
Methods for determining case hardenability of carburized steels are given in SAE J Final correlation sae j1268 actual parts is necessary. For new components where manufacturing experience is lacking, hardenability data may be effectively used to estimate the hardness profile provided by any given steel.
One such procedure is described in Appendix A. Any sae j1268 test made under other conditions than those given in this document will not be deemed standard and will be subject to agreement sae j1268 supplier and user. Various hardenability application methods are described in the selected references, Section 2.
However, se should 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 any specific grade of steel. Attendantly, the ability to predict sae j1268 from chemical composition has become increasingly important when comparing various steel grades or developing new steels sae j1268 specific applications.
Hardenability data may be 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. Other hardenability prediction methods are sae j1268 from the selected references in Section 2.
SAE J1268 Grade 94B17H
It appears none of these methods are precise, but these are often useful for estimation purposes. 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 testing. For routine testing of the hardenability of successive heats sae j1268 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 certain hardness sae j1268 obtained.