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SS BT20①

Chemical composition(mass fraction)(wt.%)

Chemical composition(mass fraction)(wt.%)
C(％) Si(％) Mn(％) Cr(％) Mo(％) V(%) W(%) Co(%)
0.75-0.85 ≤0.40 ≤0.40 4.25-5.00 ≤1.00 1.40-1.60 21.0-22.5 ≤0.60

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