42CrMo無縫鋼管鋼的牌號和化學(xué)成分(熔煉分析)應(yīng)符合表1規(guī)定。
表1
牌號 |
等級 |
化學(xué)成分,% |
脫氧方法 |
C |
Mn |
Si |
S |
P |
≤ |
Q195 |
- |
0.06~0.12 |
0.25~0.50 |
0.30 |
0.050 |
0.045 |
F、b、z |
Q215 |
A |
0.09~0.15 |
0.25~0.55 |
0.30 |
0.050 |
0.045 |
F、b、z |
B |
0.045 |
Q235 |
A |
0.14~0.22 |
0.3~0.651 |
0.30 |
0.50 |
0.045 |
F、b、z |
B |
0.12~0.20 |
0.3~0.701 |
0.045 |
C |
≤0.18 |
0.35~0.80 |
0.040 |
0.040 |
Z |
D |
≤0.17 |
0.035 |
0.035 |
TZ |
Q255 |
A |
0.18~0.28 |
0.40~0.70 |
0.30 |
0.050 |
0.045 |
F、b、z |
B |
0.045 |
Q275 |
- |
0.28~0.38 |
0.50~0.80 |
0.35 |
0.050 |
0.045 |
b、z |
注:Q235A、B級沸騰鋼Mn含量上限為0.60%
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