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	美标低温桥梁防撞护栏的化学成分
| 标准 | 牌号 | 化学成分(%) | ||||||||||
| C | Si | Mn | P | S | Cr | Ni | Cu | Mo | V | Al | ||
| ASTM A333 | Grade 1 | ≤0.30 |  | 0.40-1.06 | ≤0.025 | ≤0.025 |  |  |  |  |  |  | 
| Grade 3 | ≤0.19 | 0.18-0.37 | 0.31-0.64 | ≤0.025 | ≤0.025 |  | 3.18-3.82 |  |  |  |  | |
| Grade 4 | ≤0.12 | 0.18-0.37 | 0.50-1.05 | ≤0.025 | ≤0.025 | 0.44-1.01 | 0.47-0.98 | 0.40-0.75 |  |  | 0.04-0.30 | |
| Grade 6 | ≤0.30 | ≥0.10 | 0.29-1.06 | ≤0.025 | ≤0.025 |  |  |  |  |  |  | |
| Grade 7 | ≤0.19 | 0.13-0.32 | ≤0.90 | ≤0.025 | ≤0.025 |  | 2.03-2.57 |  |  |  |  | |
| Grade 8 | ≤0.13 | 0.13-0.32 | ≤0.90 | ≤0.025 | ≤0.025 |  | 8.40-9.60 |  |  |  |  | |
| Grade 9 | ≤0.20 |  | 0.40-1.06 | ≤0.025 | ≤0.025 |  | 1.60-2.24 | 0.75-1.25 |  |  |  | |
| Grade 10 | ≤0.20 | 0.10-0.35 | 1.15-1.50 | ≤0.03 | ≤0.015 | ≤0.15 | ≤0.25 | ≤0.015 | ≤0.50 | ≤0.12 | ≤0.06 | |
| Grade 11 | ≤0.10 | ≤0.35 | ≤0.6 | ≤0.025 | ≤0.025 | ≤0.50 | 35.0-37.0 |  | ≤0.50 |  | ||
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