钢管材质化学成分比较
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C Mn Si S P Cr Ni Cu
Q1950.06-0.120.25-0.50≤0.30≤0.05≤0.045
Q215A0.09-0.150.25-0.55≤0.30≤0.05≤0.045
Q215B0.09-0.150.25-0.55≤0.30≤0.045≤0.045
Q235A0.14-0.220.30-0.651≤0.30≤0.05≤0.045
Q235B0.12-0.200.30-0.701≤0.30≤0.045≤0.045
Q235C≤0.180.35-0.80≤0.30≤0.040≤0.040
Q235D≤0.170.35-0.80≤0.30≤0.035≤0.035
Q255A0.18-0.280.40-0.70≤0.30≤0.05≤0.045
Q255B0.18-0.280.40-0.70≤0.30≤0.045≤0.045
Q2750.28-0.380.50-0.80≤0.35≤0.05≤0.045
10#0.07-0.140.35-0.650.17-0.37≤0.030≤0.030
200.17-0.240.35-0.650.17-0.37≤0.035≤0.035
350.32-0.400.50-0.800.17-0.37≤0.035≤0.035
450.42-0.500.50-0.800.17-0.37≤0.035≤0.035
Q3450.12-0.20 1.20-1.600.20-0.55≤0.035≤0.035
16Mn0.12-0.20 1.20-1.600.20-0.60≤0.030≤0.030
15MnV0.12-0.18 1.20-1.600.20-0.60≤0.030≤0.030
09Mn2V≤0.12 1.40-1.800.20-0.50
09MnTiCuRe≤0.12 1.30-1.700.20-0.400.20-0.50 06A1NbCuN
Mo Ti V Nb
0.04-0.12
0.04-0.10
≤0.03