宝钢HC420/780DP冷轧双相汽车用钢 HC表示冷成形用高强度冷轧钢，最小屈服强度 420MPa，最小抗拉强度780MPa，DP代表双相钢（铁素体 马氏体双相组织）。屈服强度≥420MPa，抗拉强度≥780MPa，延伸≥18%。参考成分含碳≤0.10，添加微量 Nb、Ti 合金强化。具备超高强、高屈强比、优良冷成形性的特点，可适配复杂冲压工艺，主要用在汽车保险杠骨架、车门防撞梁、底盘加强件等核
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