急
材质345c与345区别
- 提问者网友:风月客
- 2021-04-27 13:12
- 五星知识达人网友:执傲
- 2021-04-27 14:18
根据国家标准,Q345分为A、B、C、D、E五种,他们之间只是各种元素含量不同。详见下表。
低合金高强度结构钢的牌号和化学成分
牌号 | 等 级 | 化学成分(质量分数)(%) | ||||||||||
C≤ | Mn | Si ≤ | P ≤ | S ≤ | V | Nb | Ti | Al≥ | Cr≤ | Ni≤ | ||
Q295 | A | O.16 | 0.80 ~1.50 | 0.55 | 0.045 | 0.045 | 0.02 ~O.15 | 0.015 ~O.060 | O.02 ~0.20 |
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B | 0.040 | O.040 |
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Q345 | A | O.20 | 1.00 ~1.60 | 0.55 | 0.045 | O.045 | 0.02 ~O.15 | 0.015 ~O.060 | 0.02 ~O.20 |
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B | O.040 | O.040 |
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C | 0.035 | 0.035 | O.015 |
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D | O.18 | 0.030 | O.030 | O.015 |
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E | 0.025 | O.025 | O.015 |
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Q390 | A | 0.20 | 1.00 ~1.60 | O.55 | 0.045 | 0.045 | O.02 ~O.20 | O.015~ 0.060 | O.02 ~O.20 |
| O.30 | 0.70 |
B | O.040 | O.040 |
| O.30 | O.70 | |||||||
C | O.035 | O.035 | O.015 | 0.30 | O.70 | |||||||
D | O.030 | 0.030 | 0.015 | O.30 | 0.70 | |||||||
E | 0.025 | O.025 | O.015 | O.30 | 0.70 | |||||||
Q420 | A | O.20 | 1.00 ~ 1.70 | O.55 | O.045 | O.045 | O.02 ~0.20 | O.015 ~0.060 | 0.02 ~O.20 |
| O.40 | O.70 |
B | 0.040 | O.040 |
| O.40 | O.70 | |||||||
C | O.035 | O.035 | 0.015 | 0.40 | O.70 | |||||||
D | O.030 | 0.030 | 0.015 | O.40 | O.70 | |||||||
E | 0.025 | 0.025 | 0.015 | O.40 | O.70 | |||||||
Q460 | C | O.20 | 1.00 ~ 1.70 |
O.55 | 0.035 | 0.035 | 0.02 ~0.20 | 0.015 ~O.060 | 0.02 ~O.20 | O.015 | O.70 | 0.70 |
D | O.030 | 0.030 | 0.015 | 0.70 | 0.70 | |||||||
E | 0.025 | O.025 | O.015 | 0.70 | 0.70 |