ASTM A333
Material Standard：
ASTM A333——Seamless and Welded Steel Pipe
Mainly Grade：
Grade 1, Grade 3, Grade 4, Grade 6, Grade 7, Grade 8, Grade 9, Grade 10, Grade 11
Specifications:
★ Application: It is widely applied for the low temperature service.
Strike Temperature Condition:
| Crade | The lowest temperature for strike test | |
| ℉ | ℃ | |
| Grade 1 | -50 | -45 |
| Grade 3 | -150 | -100 |
| Grade 4 | -150 | -100 |
| Grade 6 | -50 | -45 |
| Grade 7 | -100 | -75 |
| Grade 8 | -320 | -195 |
| Grade 9 | -100 | -75 |
| Grade 10 | -75 | -60 |
Mechanical Properities:
| Standard | Grade | Tensile Strength (MPa） | Yield Point (MPa) | Elongation (%) | |
| Y | X | ||||
| ASTM A333 | Grade 1 | ≥380 | ≥205 | ≥35 | ≥25 |
| Grade 3 | ≥450 | ≥240 | ≥30 | ≥20 | |
| Grade 4 | ≥415 | ≥240 | ≥30 | ≥16.5 | |
| Grade 6 | ≥415 | ≥240 | ≥30 | ≥16.5 | |
| Grade 7 | ≥450 | ≥240 | ≥30 | ≥22 | |
| Grade 8 | ≥690 | ≥515 | ≥22 | ||
| Grade 9 | ≥435 | ≥315 | ≥28 | ||
| Grade 10 | ≥550 | ≥450 | ≥22 | ||
| Grade 11 | ≥450 | ≥240 | ≥18 | ||
Grade and Chemical Composition:
| Standard | Grade | Chemical Composition (%) | ||||||||||
| 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 | ||||
