ASTM A106 Seamless Carbon Steel Pipe for High-Temperature Service
ASTM A106 Hot Finished Seamless Tubing High-Temperature Seamless Carbon Steel Pipe
ASTM A106 is a widely used specification for hot finished seamless carbon steel pipes designed for high-temperature service. These pipes are extensively used in power generation, oil and gas, petrochemical industries, and other applications requiring high strength and excellent heat resistance.
Material
ASTM A106 pipes are made from carbon steel and manufactured using a hot-finished seamless process. This process ensures a uniform grain structure and superior mechanical properties suitable for high-temperature applications.
Specification
- Standard: ASTM A106/A106M
- Type: Seamless carbon steel pipe
- Manufacturing method: Hot Finished or Hot Rolled
- Grades: A, B, and C
- Application temperature: Suitable for elevated temperature services
- Sizes: NPS 1/8 to NPS 48 (DN 6 to DN 1200)
- Wall thickness: As per ASME B36.10M standard
Chemical Composition
| Element | Grade A (%) | Grade B (%) | Grade C (%) |
|---|---|---|---|
| Carbon (C) | 0.25 max | 0.30 max | 0.35 max |
| Manganese (Mn) | 0.29-1.06 | 0.29-1.06 | 0.29-1.06 |
| Phosphorus (P) | 0.035 max | 0.035 max | 0.035 max |
| Sulfur (S) | 0.035 max | 0.035 max | 0.035 max |
| Silicon (Si) | 0.10-0.35 | 0.10-0.35 | 0.10-0.35 |
Mechanical Properties
| Property | Grade A | Grade B | Grade C |
|---|---|---|---|
| Tensile Strength (MPa) | 415 min | 415 min | 415 min |
| Yield Strength (MPa) | 240 min | 240 min | 260 min |
| Elongation (%) | 30 min | 30 min | 30 min |
| Hardness (HB) | — | — | — |
Key Features
- Manufactured by hot finishing seamless process for enhanced mechanical properties
- Suitable for high-temperature and high-pressure service
- Available in three grades for varying strength and heat resistance requirements
- Compliant with both ASTM and ASME standards
- Resistant to oxidation and scaling at elevated temperatures
- Excellent weldability and machinability
Application
ASTM A106 seamless carbon steel pipes are primarily used in:
- Power plants and boilers for high-temperature steam lines
- Oil and gas transportation
- Petrochemical plants
- Refineries for conveying fluids under pressure and high temperature
- Heat exchangers and condensers
- General high-temperature service applications in industrial plants
Equivalent Grades
| Standard | Equivalent Grade(s) |
|---|---|
| ASME SA106 | SA106 Grade A, B, C |
| API 5L | Grade B |
| EN 10216-2 | P235GH, P245GH |
| DIN EN 10210 | S235JRG1 |
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