42CrMo無縫鋼管鋼的熔煉成分應(yīng)符合下表的規(guī)定
級(jí)別 |
化 學(xué) 成 分 % |
C≤ |
Mn |
P≤ |
S≤ |
Si |
Ni |
Cr |
Cu |
AL |
V≤ |
Nb≤ |
Mo≤ |
Co≤ |
Gr.1 |
0.30 |
0.40-1.06 |
0.025 |
0.025 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
Gr.3 |
0.19 |
0.31-0.64 |
0.025 |
0.025 |
0.18-0.37 |
3.18-3.82 |
- |
- |
- |
- |
- |
- |
- |
Gr.4 |
0.12 |
0.50-1.05 |
0.025 |
0.025 |
0.18-0.37 |
0.47-0.98 |
0.44-1.01 |
0.40-0.75 |
0.04-0.30 |
- |
- |
- |
- |
Gr.6 |
0.30 |
0.29-1.06 |
0.025 |
0.025 |
≥0.10 |
- |
- |
- |
- |
- |
- |
- |
- |
Gr.7 |
0.19 |
≤0.90 |
0.025 |
0.025 |
0.13-0.32 |
2.03-2.57 |
- |
- |
- |
- |
- |
- |
- |
Gr.9 |
0.20 |
0.40-1.06 |
0.025 |
0.025 |
- |
1.60-2.24 |
- |
0.75-1.25 |
- |
- |
- |
- |
- |
Gr.10 |
0.20 |
1.15-1.50 |
0.035 |
0.015 |
0.10-0.35 |
≤0.25 |
≤0.15 |
≤0.15 |
≤0.06 |
0.12 |
0.05 |
0.05 |
- |
注:當(dāng)碳含量低于0.30%時(shí),每降低0.01%,則錳含量可以在1.06%以上增加0.05%,直至允許最大錳含量為1.35%
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