H: 冷成形用高强度扁平材，flat products of high strength for cold formming
c: 冷车，cold rolled
550:规定的小屈服强度，MPa
980:规定的小抗拉强度，MPa
DP: 双相钢，dual phase steels
H: 冷成形用高强度扁平材，flat products of high strength for cold formming
c: 冷车，cold rolled
550:规定的小屈服强度，MPa
980:规定的小抗拉强度，MPa
DP: 双相钢，dual phase steels