美国商业质量等级M系列碳素钢棒材钢号M1008M1010M1012M1015M1017M1020M1023M1025M1031M1044美国异形材用碳素钢1524G152401527G152701536G153601541G154101548G154801552G15520美国标准低合金高强度钢ASTMA242A441A529A572A588A606A607A618A633A656A690A709A715A808A812A841A871A242A572A588A606A607A618A633A656A690A709A715A808A812A841A871美国合金结构钢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***43BV1243BV1443174320G432004337G43370E4337G43376)