Chemical composition of the steel material table and low carbon steel boiler combined GB 713 Chemical Composition% C Si Mn PS Cu 20g 0.24 0.15-0.30 0.35-0.65 0.035 0.035 22g 0.26 0.17-0.37 0.60-0.90 0.035 0.035 12Mng 0.16 0.20-0.60 1.10-1.50 0.035 0.035 16Mng 0.12-0.20 0.20-0.60 1.20-
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