SAE4140
SAE4140
(OP)
I'm trying to find out what the differences are between SAE4140 & SAE 4142 steels. Is 4142 just a prehardened form of 4140?
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RE: SAE4140
According to SAE J1268 Hardenability Bands for Carbon and Alloy H Steels, alloy 4142 has better hardenability.
4142 is not a prehardened version of 4140. They both require the same thermomechanical processing to develop their properties.
RE: SAE4140