Low Temperature ASTM A333 Gr 6 Round Pipe
Dec 04, 2025
Low Temperature ASTM A333 Gr 6 Round Pipe description
A333 Gr.6 cryogenic seamless steel pipe belongs to the American ASTM A333/A333M standard. It is a nickel-free low-temperature steel pipe, specifically an aluminum-deoxidized fine-grained steel with excellent low-temperature toughness. Its metallographic structure consists of body-centered cubic ferrite. These pipes are typically delivered in normalized or normalized and tempered conditions.
A333 Gr.6 seamless steel pipes are primarily used in:
Transportation pipelines for low-temperature liquids (such as liquefied natural gas LNG, liquid ammonia, etc.).
Petrochemical industry: Storage and transportation systems for low-temperature chemicals, such as pipelines in low-temperature separation and synthetic ammonia processes.
Refrigeration industry: Low-temperature piping sections in refrigeration equipment, such as refrigerant transportation pipelines in large-scale cold storage facilities.
Additionally, they play vital roles in Arctic research facilities and liquid carbon dioxide transportation fields. These environments and applications require piping materials capable of safe and reliable operation in low-temperature conditions.
ASTM A333 GR.6 Carbon Steel Pipes and Tubes Chemical Composition
| C, max | Mn | P, max | S, max | Si | Ni |
| 0.30 | 0.29 – 1.06 | 0.025 | 0.025 | 0.10 min | – |
ASTM A333 GR.6 Carbon Steel Pipes and Tubes Mechanical Properties
| Tensilee strength, min, psi (MPa) | Yield strength, min, psi (MPa) | Elongation (%) |
| 60 000 (415) | 35 000 (240) | 30 min |
Equivalent Grades Of Grade 6 ASTM A333 Pipe
| Former | New | |||
| Execution | Standard | Material | Standard | Material |
| Seamless | ASTM A333 | GRADE 6 | EN 10216-4 | P265NL |
| DIN | EN | BS | NFA | ASTM | ASME |
| DIN 17178 Grade FGP 28 | EN P265NL Grade 10216-4 | NFA A 36-2051) Grade A 42 AP | ASTM A333 Grade6 | ASME SA 333 Grade 6 | UNI C20 |
Test and inspection
A333 GR6 Pipe Factory
