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C Si Mn P S Cr Mo Ni Cu 其它 GCr15 0.95~1.05 0.15~0.35 0.20~0.40 ≤0.027 ≤0.020 1.30~1.65 ≤0.10 ≤0.30 ≤0.25 0≤ 15ppm 9Cr18 0.90~1.00 ≤0.80 ≤0.80 ≤0.035 ≤0.030 17.0~19.0 ≤0.75 ≤0.60 9Cr18Mo 0.95~1.10 ≤0.80 ≤0.80 ≤0.035 ≤0.030 16.0~18.0 0.40~0.70 ≤0.60 Cr4Mo4V 0.75~0.85 ≤0.35 ≤0.35 ≤0.027 ≤0.020 3.75~4.25 4.00~4.50 ≤0.20 ≤0.20 v4.00~4.50