More A The methods for estimating the hardness value of the material are presented. Method A is the minimum and maximum hardness values at any desired distance, Method B is the minimum and maximum distances at which any desired hardness value occurs, Method C is the two maximum hardness values at two desired distances, Method D is the two minimum hardness values at two desired distances, and Method E is any minimum hardness plus any maximum hardness. The heat analysis shall conform to the requirements as to chemical composition.
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Mular Other hardenability prediction methods are available sae j the selected references in Section 2. Attendantly, the ability to predict hardenability from chemical composition has become increasingly important when comparing various sae j grades or developing new sae j for specific applications. However, it should be emphasized that the use of any hardenability sze procedure does not preclude the importance of conducting Jominy end-quench tests to determine the actual hardenability of any specific grade of steel.
SAE J Grade H For new components where manufacturing experience is lacking, hardenability data may be effectively used to estimate the hardness profile provided by any given steel. Any hardenability sae j 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.
The hardenability test may be used in sae j way as an empirical test. Methods sae j determining case hardenability of carburized steels are given in SAE J One such procedure is described in Appendix A. It appears sae j 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 sae j hardenability of a steel which has sse satisfactory for the use intended. This designation may also be adequate for comparing steels of different compositions to see whether they have similar hardenability.
Hardenability data may be used to estimate hardnesses obtainable with any steel in new machine parts not yet in production and not sad to any parts on which production experience is available. For routine testing 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 sae j which a certain hardness is obtained.
Various hardenability application methods are described in the selected references, Section 2. This SAE Sae j prescribes the procedure for making hardenability tests and recording results on shallow and medium hardening steels, but not deep hardening steels that will sae j air harden. TOP Related Posts.
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