舞阳产 优质低合金系列钢板 Q420A/B/C/D/E 8-200mm
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化学成分
【化学成分】（质量分数）（%）
等级 | C | Mn | Si | P | S | V | Nb | Ti | Al | Cr | Ni |
A | ≦0.20 | 1.00～1.70 | ≦0.55 | ≦0.045 | ≦0.045 | 0.02～0.20 | 0.015～0.060 | 0.02～0.20 | - | ≦0.40 | ≦0.70 |
B | ≦0.20 | 1.00～1.70 | ≦0.55 | ≦0.040 | ≦0.040 | 0.02～0.20 | 0.015～0.060 | 0.02～0.20 | - | ≦0.40 | ≦0.70 |
C | ≦0.20 | 1.00～1.70 | ≦0.55 | ≦0.035 | ≦0.035 | 0.02～0.20 | 0.015～0.060 | 0.02～0.20 | ≧0.015 | ≦0.40 | ≦0.70 |
D | ≦0.20 | 1.00～1.70 | ≦0.55 | ≦0.030 | ≦0.030 | 0.02～0.20 | 0.015～0.060 | 0.02～0.20 | ≧0.015 | ≦0.40 | ≦0.70 |
E | ≦0.20 | 1.00～1.70 | ≦0.55 | ≦0.025 | ≦0.025 | 0.02～0.20 | 0.015～0.060 | 0.02～0.20 | ≧0.015 | ≦0.40 | ≦0.70 |
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