ASTM A333 Grade 6: Main Features and Alternative Materials
ASTM A333 Grade 6 is a seamless and welded steel pipe widely used in low temperature environments, especially in the oil, gas and chemical industries.
Reference Standards
1. ASTM A333/A333M: Standard Specification for Seamless and Welded Steel Pipe for Low Temperature Service.
2. ASME B36.10: Dimension and Weight Standard for Steel Pipe.
Heat Treatment
Heat Treatment Method: Normalizing or annealing is usually used to improve its mechanical properties and toughness.
Chemical Composition
C | Mn | Si | P | S |
≤ 0.18% | 0.27% - 1.40% | ≤ 0.10% | ≤ 0.025% | ≤ 0.025% |
Mechanical properties
Yield Strength | Tension strength | Elongation |
≥ 240 MPa (35 ksi) | 415 - 585 MPa (60 - 85 ksi) | ≥ 30% |
ASTM A333 Grade 6 alternative materials
Alternative Materials | Description |
ASTM A106 Grade B | Suitable for high and low temperature applications, performance is slightly inferior to A333 Grade 6. |
ASTM A252 Grade 2 | For load-bearing pipes, suitable for low temperature environments. |
API 5L Grade B | Suitable for the oil and gas industry, good corrosion resistance. |
ASTM A335 P11 | Alloy steel pipe, suitable for high and low temperature applications. |
ASTM A333 Grade 6 Applications
Oil and gas pipelines: suitable for transporting oil, gas and other fluids.
Chemical facilities: used for pipelines in low-temperature reactors and storage tanks.
Cooling systems: used for cooling water pipelines in low-temperature environments.
