Grade guide · MS / CS & Alloy Steel
SA-516 Gr 70: properties, composition, uses and standards
Short answer
SA-516 Gr 70 is a carbon steel pressure-vessel plate, chosen for boilers, pressure vessels and storage tanks., density 7.85 g/cm³.
What is SA-516 Gr 70?
SA-516 Gr 70 is a carbon steel pressure-vessel plate. Engineers choose it for boilers, pressure vessels and storage tanks. It is also known as ASTM A516 Gr 70, Boiler-quality (BQ) plate, Pressure-vessel plate.
- Designation
- SA-516 Gr 70
- Also called
- ASTM A516 Gr 70 · Boiler-quality (BQ) plate · Pressure-vessel plate
- Standard
- ASTM A516 Grade 70
- Density
- 7.85 g/cm³
- Melting range
- 1420 – 1530 °C
- Magnetic
- Magnetic
Chemical composition
| Element | Weight % |
|---|---|
| Carbon | 0.27 – 0.31 max (by thickness) |
| Manganese | 0.85 – 1.20 |
| Silicon | 0.15 – 0.40 |
| Phosphorus | 0.025 max |
| Sulphur | 0.025 max |
Per ASTM A516 Grade 70.
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength | 485 – 620 MPa · 70 – 90 ksi |
| Yield strength | 260 MPa · 38 ksi |
| Elongation (50 mm) | 21% |
Minimum values. Values for pipe, bar and forgings differ slightly — see the product standard.
Where SA-516 Gr 70 is used
- Pressure vessels. Shells and heads. Industry →
- Boilers. Drums and headers. Industry →
- Storage tanks. Oil and gas storage. Industry →
Welding 516-70
The matching filler is E7018 / ER70S-6. Normalised plate (A516 N) for thick or impact-tested vessels.
SA-516 Gr 70 standards by product
| Product | Standard |
|---|---|
| SA-516 Gr 70 plate | ASTM A516 Gr 70 · ASME SA-516 |
Buying SA-516 Gr 70: what to specify
- The product standard and the UNS or designation — for example ASTM A516 Gr 70 · ASME SA-516.
- 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.