420J1 Vs. 420J2 Stainless Steel: What’s the Difference
Generally, grade 420 belongs to the martensitic stainless steel family. The grades of the martensitic family got their hardness from heat treatment processes such as quenching. 420J1 and 420J2 grades also get their hardness by heating at high temperatures and then quenched in oil or open air. The carbon concentration mostly determines the highest quenched …
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