化學(xué)成分
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標(biāo)準(zhǔn):
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牌號(hào): 444
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具體成分:s: ≤0.030
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C: ≤0.025CR: 17.5~25.0
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Sl: ≤1.00Ni: ≤1.00
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MN: ≤1.00MO: 1.75~2.50
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P: ≤0.040N: ≤0.035
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其他: Ti+Nb0.20+4*(C+N)~0.8