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GBT K640

Chemical composition(mass fraction)(wt.%)

Chemical composition(mass fraction)(wt.%)
C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) W(%) Co(%)
0.45-0.55 Max 1 Max 1 Max 0.04 Max 0.04 24.5-26.5 9.50-11.5 7.00-8.00 Balance

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