Grade guide · MS / CS & Alloy Steel
ASTM A106 Gr B: properties, composition, uses and standards
Short answer
ASTM A106 Gr B is a seamless carbon steel pipe for high-temperature service, chosen for high-temperature process and steam piping in refineries and power plants., density 7.85 g/cm³.
What is ASTM A106 Gr B?
ASTM A106 Gr B is a seamless carbon steel pipe for high-temperature service. Engineers choose it for high-temperature process and steam piping in refineries and power plants. It is also known as SA-106 Gr B, Seamless carbon steel pipe, UNS K03006.
- Designation
- ASTM A106 Gr B
- Also called
- SA-106 Gr B · Seamless carbon steel pipe · UNS K03006
- Standard
- ASTM A106 Grade B
- 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 | 0.035 max |
| Sulphur | 0.035 max |
| Chromium | 0.40 max |
| Copper | 0.40 max |
| Nickel | 0.40 max |
| Molybdenum | 0.15 max |
| Vanadium | 0.08 max |
Per ASTM A106 Grade B.
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength | 415 MPa · 60 ksi |
| Yield strength 0.2% | 240 MPa · 35 ksi |
| Elongation | 30% |
Minimum values (elongation varies with wall). Values for pipe, bar and forgings differ slightly — see the product standard.
Where ASTM A106 Gr B is used
- Refineries. Process and steam lines. Industry →
- Power plants. Steam and feedwater piping. Industry →
- Oil & gas. Plant piping and headers. Industry →
Welding A106 B
The matching filler is ER70S-6 / E7018. Preheat thick walls per the WPS.
ASTM A106 Gr B standards by product
Buying ASTM A106 Gr B: what to specify
- The product standard and the UNS or designation — for example ASTM A106 Gr B.
- 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.