ASTM A333 Grade 6 Carbon Steel Seamless Pipe description
A333Gr.6, a type of American standard low-temperature toughness steel, is primarily used in industrial piping systems operating in cryogenic environments, particularly suitable for applications requiring tolerance to extreme low temperatures and stringent fracture toughness requirements. Its design aims to prevent brittle fracture at low temperatures, thus it is widely used in various cryogenic equipment and piping projects.
ASTM A333 Gr.6 Low-Temperature Pipes Specification
ASTM A333 Gr.6 Seamless Low-Temperature Pipes Chemical Composition
| C(max) | Mn | P(max) | S(max) | Si | Ni | |
| Grade 6 | 0.3 | 0.29 – 1.06 | 0.025 | 0.025 | 0.10 (min) |
ASTM A333 Grade 6 Carbon Steel Seamless Pipe Yield and Tensile Strength
| ASTM A333 Grade 6 | |
| Minimum Yield | 35,000 PSI |
| Minimum Tensile | 60,000 PSI |
ASTM A333 Grade 6 Carbon Steel Seamless Pipe Wall Thickness & Tolerance
| Outside Diameter, inch | Tolerance, % |
| 1/8≤OD≤2-1/2 | +20.0/-12.5 |
| 3≤OD≤18, WT/OD≤5% | +22.5/-12.5 |
| 3≤OD≤18, WT/OD>5% | +15.0/-12.5 |
| OD≥20, WT/OD≤5% | +22.5/-12.5 |
| OD≥20, WT/OD>5% | +15.0/-12.5 |
Applications
Cryogenic Pressure Vessels and Heat Exchanger Piping
Suitable for cryogenic pressure vessel piping and cryogenic heat exchanger piping with temperatures ranging from -45°C to -195°C, such as in storage and transportation systems for cryogenic media like liquefied natural gas (LNG), liquid nitrogen, and liquid oxygen.
Industrial Piping Systems
Used as seamless or welded steel pipes for transporting cryogenic fluids in industrial pipelines, such as cryogenic process pipelines in the chemical, oil, and natural gas industries.
Scenarios for Replacing Domestic Materials
Due to its similar temperature range (minimum -46°C) and fracture toughness to domestic 16Mn steel (16Mn's minimum operating temperature is -40°C), it can replace 16Mn steel in applications requiring higher cryogenic performance.
Test and inspection
Packaging and shipping
