ASTM A333 / SA333 Gr 7 Seamless and Welded Carbon Steel Pipes
ASTM A333 / SA333 Gr 7 covers seamless and welded carbon steel pipes intended for low-temperature service. This grade provides reliable toughness and strength in sub-zero conditions, making it suitable for cryogenic systems, LNG transport, and applications requiring excellent notch toughness. Grade 7 is alloyed with a small amount of nickel to enhance low-temperature impact resistance.
Key Features
- Designed for low-temperature service
- Alloyed with nickel for better toughness
- Excellent weldability and machinability
- Available in seamless and welded forms
- Ideal for cryogenic and LNG applications
ASTM A333 / SA333 Gr 7 Chemical Composition
Element |
Composition (%) |
Carbon (C) |
0.19 max |
Manganese (Mn) |
0.90 max |
Phosphorus (P) |
0.025 max |
Sulfur (S) |
0.025 max |
Silicon (Si) |
0.13 – 0.32 |
Nickel (Ni) |
0.40 – 1.06 |
ASTM A333 / SA333 Gr 7 Mechanical Properties
Property |
Requirement |
Tensile Strength (MPa) |
415 min |
Yield Strength (MPa) |
240 min |
Elongation (%) |
30 min |
Impact Test (–45°C) |
Required (Charpy V-Notch) |
Heat Treatment
- Normalized
- Normalized & Tempered
- Quenched & Tempered (if required by specification)
Applications
- LNG pipelines and cryogenic storage
- Petrochemical and chemical plants
- Oil & Gas transmission pipelines
- Power plants and refineries
- Shipbuilding and offshore platforms
Reviews
There are no reviews yet.