ASTM A106 Grade B Carbon Steel Pipe
Seamless Carbon Steel Pipe for High-Temperature Service
ASTM A106 Pipe (also known as ASME SA106 pipe) is the standard specification for seamless carbon steel pipe for high-temperature service. Unlike A53, A106 is manufactured only as a seamless pipe, making it ideal for high-pressure applications in refineries, power plants, and industrial boilers. It is intended for use in temperatures up to 750°F and is suitable for flanging and similar forming operations.
Technical Specifications
| Feature | Details |
|---|---|
| Standard | ASTM A106 / ASME SA106 |
| Grade | Grade B (Most Common), Grade A, Grade C |
| Size Range | 1/8" NB to 36" NB |
| Wall Thickness | Schedule 20 to Schedule XXS (Custom up to 100mm) |
| Type | Seamless (Cold Drawn / Hot Finished) |
| Coating | Black Vanish, FBE, 3PE, Galvanized |
Mechanical Properties
| Property | ASTM A106 Grade B Value |
|---|---|
| Yield Strength (Min) | 35,000 psi (240 MPa) |
| Tensile Strength (Min) | 60,000 psi (415 MPa) |
| Elongation | Refer to standard elongation table in ASTM A106 |
Chemical Composition (%)
| Element | Percentage (Max unless specified) |
|---|---|
| Carbon (C) | 0.30% max |
| Manganese (Mn) | 0.29% - 1.06% |
| Phosphorus (P) | 0.035% max |
| Sulphur (S) | 0.035% max |
| Silicon (Si) | 0.10% min |
| Chromium (Cr) | 0.40% max |
| Molybdenum (Mo) | 0.15% max |
Features and Benefits of ASTM A106 Pipe
- Specifically designed for high-temperature and high-pressure service
- 100% Seamless construction ensuring maximum reliability
- Superior bending and flanging properties for industrial fabrication
- Strict chemical controls including minimum Silicon content for heat resistance
- Extensively tested (Hydrostatic, NDT) for critical environment safety
- High resistance to structural deformation under thermal stress
- Long operational life in refineries and power generation plants
- Fully compatible with standard carbon steel welding procedures
Applications & Uses
Refineries
Used in process piping carrying hot fluids and gases under high pressure.
Power Plants
Essential for high-pressure steam lines and boiler water feed systems.
Industrial Boiler
Designed for the harsh thermal environments of industrial heating and heat exchangers.