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ASTM ASTM 631

Chemical composition(mass fraction)(wt.%)

Chemical composition(mass fraction)(wt.%)
C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Al(%)
Max 0.09 Max 1.00 Max 1.00 Max 0.04 Max 0.04 16.0-18.0 6.5-7.75 0.75-1.50

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