Grade guide · MS / CS & Alloy Steel
ASTM A333 Gr 6: properties, composition, uses and standards
Short answer
ASTM A333 Gr 6 is a low-temperature carbon steel pipe, impact-tested to −45 °C, chosen for cold-climate and refrigerated piping down to −45 °C., density 7.85 g/cm³.
What is ASTM A333 Gr 6?
ASTM A333 Gr 6 is a low-temperature carbon steel pipe, impact-tested to −45 °C. Engineers choose it for cold-climate and refrigerated piping down to −45 °C. It is also known as SA-333 Gr 6, Low-temperature carbon steel pipe, LTCS.
- Designation
- ASTM A333 Gr 6
- Also called
- SA-333 Gr 6 · Low-temperature carbon steel pipe · LTCS
- Standard
- ASTM A333 Grade 6
- Density
- 7.85 g/cm³
- Melting range
- 1420 – 1530 °C
- Magnetic
- Magnetic
Chemical composition
| Element | Weight % |
|---|---|
| Carbon | 0.30 max |
| Manganese | 0.29 – 1.06 |
| Silicon | 0.10 min |
| Phosphorus | 0.025 max |
| Sulphur | 0.025 max |
Per ASTM A333 Grade 6.
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength | 415 MPa · 60 ksi |
| Yield strength 0.2% | 240 MPa · 35 ksi |
| Elongation | 30% |
| Charpy impact | Tested at −45 °C |
Minimum values. Values for pipe, bar and forgings differ slightly — see the product standard.
Where ASTM A333 Gr 6 is used
- LNG & refrigeration. Cold process lines. Industry →
- Petrochemical. Cold-service piping. Industry →
- Cold climates. Outdoor pipelines. Industry →
Welding A333 Gr 6
The matching filler is E7018-1 / ER80S-Ni1. Impact-tested procedure required.
ASTM A333 Gr 6 standards by product
Buying ASTM A333 Gr 6: what to specify
- The product standard and the UNS or designation — for example ASTM A333 Gr 6 · ASTM A333 Gr 6.
- Size, thickness or schedule, and quantity in pieces and kg or metres.
- Heat-treatment condition where the standard offers a choice.
- Certificate: EN 10204 3.1 as standard, 3.2 if a third party must witness.