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Hardening of 4140 2

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xydrex

Automotive
Mar 15, 2005
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Hi, what impact on fatigue life would through hardening have on 4140 steel?
 
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In general, with all other things equal, there is a direct correlation between tensile strength and fatigue limit for steels. As the tensile strength increases, the fatigue limit will increase.

Below is a web site that has various technical articles on fatigue (see "Effect of Metallurgical Variables on Fatigue". I believe you will find it informative on this subject;

 
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