成分 |
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cu |
最小值 |
0.62 |
0.17 |
0.9 |
- |
- |
- |
- |
- |
最大值 |
0.7 |
0.37 |
1.2 |
0.035 |
0.035 |
0.25 |
0.3 |
0.25 |
① 表中所列牌號(hào)為優(yōu)質(zhì)鋼。高級(jí)優(yōu)質(zhì)鋼烤恃,在牌號(hào)后綴A揽邀,統(tǒng)一數(shù)字代號(hào)最后一位數(shù)字改為3;特級(jí)優(yōu)質(zhì)鋼肴奠,在牌號(hào)后綴E辙势,統(tǒng)一數(shù)字代號(hào)最后一位數(shù)字改為6;沸騰鋼乡优,牌號(hào)后綴F羞媳,統(tǒng)一數(shù)字代號(hào)最后一位數(shù)字改為0;半鎮(zhèn)靜鋼秫辨,牌號(hào)后綴b扼菠,統(tǒng)一數(shù)字代號(hào)最后一位數(shù)字為1
優(yōu)質(zhì)鋼 P≤0.035%,S≤0.035%
高級(jí)優(yōu)質(zhì)鋼 P≤0.030%,S≤0.030%
特級(jí)優(yōu)質(zhì)鋼 P≤0.025%,S≤0.020%
② 08鋼用鋁脫氧冶煉鎮(zhèn)靜鋼,錳含量下限為0.25%坝咐,硅含量不大于0.03%循榆,鋁含量為0.02%~0.07%,此時(shí)鋼牌號(hào)為08Al
③ 經(jīng)供需雙方協(xié)議墨坚,08~25鋼可供應(yīng)硅含量不大于0.17%的半鎮(zhèn)靜鋼秧饮,其牌號(hào)為08b~25b
④ 使用廢鋼冶煉的鋼允許含銅量不大于0.30%;熱壓力加工用鋼的銅含量應(yīng)不大于0.20%
⑤ 冷沖壓用的沸騰鋼硅含量應(yīng)不大于0.03%
⑥ 氧氣轉(zhuǎn)爐冶煉的鋼泽篮,其氮含量應(yīng)不大于0.008%