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Which is better 304 or 420 stainless steel?

Normally, grade 420 stainless steel has a tensile strength of around 586 MPa—high, but not higher than grade 304 stainless steel (621 MPa). However, when hardened and stress relieved, grade 420 stainl

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Normally, grade 420 stainless steel has a tensile strength of around 586 MPa—high, but not higher than grade 304 stainless steel (621 MPa). However, when hardened and stress relieved, grade 420 stainless steel has a tensile strength of 1,586 MPa, nearly three times as strong as it is when annealed.

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