(2)尺寸规格
热轧、锻制圆管坯的直径和允许偏差
直径 |
允许偏差 |
直径 |
允许偏差 | ||
热轧 |
锻制 |
热轧 |
锻制 | ||
50-60 |
+/-0.8 |
- |
>110-140 |
+/-1.6 |
+3.5 -1.0 |
>60-80 |
+/-1.0 |
+2.5 -1.0 |
>140-180 |
+/-2.0 |
+4.0 -2.0 |
>80-110 |
+/-1.3 |
+3.0 -1.0 |
钢类 |
序号 |
牌号 |
化学成分(质量分数)(%) | |||||||||||||
C |
Mn |
Si |
Cr |
Mo |
V |
Ti |
B |
Ni |
Nb |
S |
P |
其他 | ||||
≤ | ||||||||||||||||
优质碳素结构钢 |
1 |
10 |
0.07-0.14 |
0.35-0.65 |
0.17-0.37 |
- |
- |
- |
- |
- |
- |
- |
0.030 |
0.030 |
- | |
2 |
20 |
0.17-0.24 |
0.35-0.65 |
0.17-0.37 |
- |
- |
- |
- |
- |
- |
- |
0.030 |
0.030 |
- | ||
3 |
20G | |||||||||||||||
4 |
20MnG |
0.17-0.24 |
0.70-1.00 |
0.17-0.37 |
- |
- |
- |
- |
- |
- |
- |
0.030 |
0.030 |
- | ||
5 |
25MnG |
0.22-0.30 |
0.70-1.00 |
0.17-0.37 |
- |
- |
- |
- |
- |
- |
- |
0.030 |
0.030 |
- | ||
低合金结构钢 |
6 |
16Mn |
0.12-0.20 |
1.20-1.60 |
0.20-0.60 |
- |
- |
- |
- |
- |
- |
- |
0.030 |
0.030 |
- | |
7 |
15MnV |
0.12-0.18 |
1.20-1.60 |
0.20-0.60 |
- |
- |
0.04-0.12 |
- |
- |
- |
- |
0.030 |
0.030 |
- | ||
合金结构钢 |
8 |
10MoMVNb |
0.07-0.13 |
0.50-0.80 |
0.50-0.80 |
- |
0.60-0.90 |
0.30-0.50 |
- |
- |
- |
Ni 0.06-0.12 |
0.030 |
0.030 |
W 0.50-0.90 | |
9 |
15MoG |
0.12-0.20 |
0.40-0.80 |
0.17-0.37 |
- |
0.25-0.35 |
- |
- |
- |
- |
- |
0.030 |
0.030 |
- | ||
10 |
20MoG |
0.15-0.25 |
0.40-0.80 |
0.17-0.37 |
- |
0.44-0.65 |
- |
- |
- |
- |
- |
0.030 |
0.030 |
- | ||
11 |
10Cr2Mo (1Cr2Mo) |
≤0.15 |
0.30-0.60 |
0.50-1.00 |
2.15-2.85 |
0.45-0.65 |
- |
- |
- |
- |
- |
0.030 |
0.030 |
- | ||
合金结构钢 |
12 |
12CrMo |
0.08-0.15 |
0.40-0.70 |
0.17-0.37 |
0.40-0.70 |
0.40-0.55 |
- |
- |
- |
- |
- |
0.030 |
0.030 |
- | |
13 |
12CrMoG | |||||||||||||||
14 |
15CrMo |
0.12-0.18 |
0.40-0.70 |
0.17-0.37 |
0.80-1.10 |
0.40-0.55 |
- |
- |
- |
- |
- |
0.030 |
0.030 |
- | ||
15 |
15CrMoG | |||||||||||||||
16 |
12Cr2Mo |
0.08-0.15 |
0.40-0.70 |
≤0.50 |
2.00-2.50 |
0.90-1.20 |
- |
- |
- |
- |
- |
0.030 |
0.030 |
- | ||
17 |
12Cr2MoG | |||||||||||||||
18 |
12Cr1MoVG |
0.08-0.15 |
0.40-0.70 |
0.17-0.37 |
0.90-1.20 |
0.25-0.35 |
0.15-0.30 |
- |
- |
- |
- |
0.030 |
0.030 |
- | ||
19 |
12Cr2MoWVTiB |
0.08-0.15 |
0.45-0.65 |
0.45-0.75 |
1.60-2.10 |
0.50-0.65 |
0.28-0.42 |
0.08-0.18 |
0.002-0.008 |
- |
- |
0.030 |
0.030 |
W 0.30-0.55 | ||
20 |
12Cr3MoVSiTiB |
0.09-0.15 |
0.50-0.80 |
0.60-0.90 |
2.50-3.00 |
1.00-1.20 |
0.25-0.35 |
0.22-0.38 |
0.005-0.011 |
- |
- |
0.030 |
0.030 |
- | ||
不锈耐热钢 |
21 |
1Cr5Mo |
≤0.15 |
≤0.60 |
≤0.50 |
4.00-6.00 |
0.45-0.60 |
- |
- |
- |
≤0.60 |
- |
0.030 |
0.030 |
- | |
22 |
1Cr9Mo1VNb (10Cr9Mo1VNb ) |
0.08-0.12 |
0.30-0.60 |
0.20-0.50 |
8.00-9.50 |
0.85-1.05 |
0.18-0.25 |
- |
- |
≤0.40 |
0.60-0.10 |
0.010 |
0.020 |
Al ≤0.040 N 0.030-0.070 | ||
23 |
1Cr19Ni9 |
0.04-0.10 |
≤2.00 |
≤1.00 |
18.00-20.00 |
8.00-11.00 |
0.030 |
0.030 |
- | |||||||
24 |
1Cr18Ni9 |
≤0.15 |
≤2.00 |
≤1.00 |
17-00-19.00 |
- |
- |
- |
- |
8.00-10.00 |
- |
0.030 |
0.030 |
- | ||
25 |
1Cr19Ni11Nb |
0.04-0.10 |
≤2.00 |
≤1.00 |
17.00-20.00 |
- |
- |
- |
- |
9.00-13.00 |
Nb+Ta ≥8C%-1.00% |
0.030 |
0.030 |
- |
注:1、钢种残余Cu含量不大于0.20%;10钢种残余元素Cr含量不大于0.15%;Ni含量不大于0.25%;20、20G、20MnG、25MnG钢的残余元素Cr、Ni含量不大于0.25%,V含量不大于0.08%;其余牌号残余元素Cr、Ni含量不大于0.030%。
2、10、20、20G钢中酸溶铝含量不大于0.010%(暂不做交货依据,但应填入质量证明书)。
3、用转炉加炉外精炼制造的钢,其氮含量应不大于0.008%。
4、含量皆指质量分数。