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序号指标范围值单位说明
质量等级为C级时 |
1 | Si ( Si ) | ≤ 0.6 | % | |
2 | Mn ( Mn ) | ≤ 2 | % | |
3 | V ( V ) | ≤ 0.12 | % | |
4 | Ti ( Ti ) | ≤ 0.2 | % | |
5 | Cr ( Cr ) | ≤ 1 | % | |
6 | Ni ( Ni ) | ≤ 0.8 | % | |
7 | Cu ( Cu ) | ≤ 0.8 | % | |
8 | N ( N ) | ≤ 0.15 | % | |
9 | Mo ( mo ) | ≤ 0.3 | % | |
10 | B ( B ) | ≤ 0.004 | % | |
11 | Als ( Als ) | ≥ 0.015 | % | |
12 | C ( C ) | ≤ 0.18 | % | |
13 | S ( S ) | ≤ 0.03 | % | |
14 | P ( P ) | ≤ 0.03 | % | |
质量等级为D级时 |
1 | Si ( Si ) | ≤ 0.6 | % | |
2 | Mn ( Mn ) | ≤ 2 | % | |
3 | Nb ( Nb ) | ≤ 0.11 | % | |
4 | V ( V ) | ≤ 0.12 | % | |
5 | Ti ( Ti ) | ≤ 0.2 | % | |
6 | Cr ( Cr ) | ≤ 1 | % | |
7 | Ni ( Ni ) | ≤ 0.8 | % | |
8 | Cu ( Cu ) | ≤ 0.8 | % | |
9 | N ( N ) | ≤ 0.15 | % | |
10 | Mo ( mo ) | ≤ 0.3 | % | |
11 | B ( B ) | ≤ 0.004 | % | |
12 | Als ( Als ) | ≥ 0.015 | % | |
13 | C ( C ) | ≤ 0.18 | % | |
14 | S ( S ) | ≤ 0.025 | % | |
15 | P ( P ) | ≤ 0.03 | % | |
质量等级为E级时 |
1 | Si ( Si ) | ≤ 0.6 | % | |
2 | Mn ( Mn ) | ≤ 2 | % | |
3 | Nb ( Nb ) | ≤ 0.11 | % | |
4 | V ( V ) | ≤ 0.12 | % | |
5 | Ti ( Ti ) | ≤ 0.2 | % | |
6 | Cr ( Cr ) | ≤ 1 | % | |
7 | Ni ( Ni ) | ≤ 0.8 | % | |
8 | Cu ( Cu ) | ≤ 0.8 | % | |
9 | N ( N ) | ≤ 0.15 | % | |
10 | Mo ( mo ) | ≤ 0.3 | % | |
11 | B ( B ) | ≤ 0.004 | % | |
12 | Als ( Als ) | ≥ 0.015 | % | |
13 | C ( C ) | ≤ 0.18 | % | |
14 | S ( S ) | ≤ 0.02 | % | |
15 | P ( P ) | ≤ 0.025 | % | |
质量等级为1C级时 |
1 | Nb ( Nb ) | ≤ 0.11 | % | |
公称直径边长或厚度为≤ 63mm时 |
1 | 碳当量 ( CE ) | ≤ 0.49 * | % | 热机轧制或热机轧制加回火状态交货钢材 |
公称直径边长或厚度为63 ~ 120mm时 |
1 | 碳当量 ( CE ) | ≤ 0.49 * | % | 热机轧制或热机轧制加回火状态交货钢材 |
公称直径边长或厚度为120 ~ 250mm时 |
1 | 碳当量 ( CE ) | ≤ 0.49 * | % | 热机轧制或热机轧制加回火状态交货钢材 |
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