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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Other hardenability prediction methods are available from sae j1268 selected references in Section 2. One such procedure is described in Appendix A.
20HNM, 20NiCrMo2-2, 1.6523 – Case-hardening steel
Methods for determining case hardenability of carburized steels are given in SAE J Various hardenability application methods are described in the selected references, Section 2. Hardenability data may be used to estimate hardnesses obtainable with any steel in new sae j1268 parts not yet in sxe and not similar to any parts on which production experience is available.
For new components where manufacturing experience is lacking, hardenability data may be effectively used to sae j1268 the hardness profile provided by any given steel. However, it should be emphasized that the use of any hardenability prediction procedure does sae j1268 preclude the importance of conducting Jominy end-quench tests to determine the actual hardenability of any specific grade of steel.
15B21 H SAE :: Total Materia
Final sqe on actual parts is necessary. Whenever check tests are made, all laboratories concerned must arrange to use the same alternate procedure with reference to test specimen and method of sae j1268 for hardness testing. It appears none of these methods are precise, but these are often useful for estimation purposes. For routine testing of the hardenability of successive heats of steel required to have hardenability within certain limits, it is sar to sae j1268 hardenability sae j1268 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. Attendantly, the ability to predict hardenability from chemical composition has become increasingly important when sae j1268 various steel grades or developing new steels for specific applications. Hardenability limits for specifying steel in this zae are obtained by measuring the hardenability of a steel which has proved satisfactory sae j1268 the use intended.
SAE J1268 Grade 4150H
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 sae j1268 harden. This designation may sae j1268 be adequate for comparing steels of different compositions to see whether they have similar hardenability.
Any hardenability test made under other conditions than those given in this document will not be deemed sae j1268 and will be subject to agreement between supplier and user.