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29-4-2 29-4-2是铁素体不锈钢 PRODUCT PARAMETERS 产品参数 化学成分 成分 C Si Mn P S Cu Ni Cr N C+N Mo 最小值 - - - - - - 2 28 - 3.5 最大值 0.01 0.2 0.3 0.025 0.02 0.15 2.5 30 0.02 0.025 4.2