ASTM A106 GrA GrB GrC High Temperature Tube Seamless Carbon Steel Tube For High-Temperature Service
Material Specification
ASTM A106 is a specification covering seamless carbon steel pipes for high-temperature service. These pipes are suitable for bending, flanging, and similar forming operations, and for welding. The specification is applicable to pipes with nominal wall thickness as well as those with special wall thickness.
Key Features
- High Temperature Resistance: Designed to withstand high temperatures, making it ideal for applications in power plants, refineries, and other high-temperature environments.
- Seamless Construction: Ensures uniform strength and structure, reducing the risk of leaks and failures.
- Versatile Applications: Suitable for bending, flanging, and forming operations, as well as welding.
- Variety of Grades: Available in three grades (A, B, and C) to meet different mechanical and chemical requirements.
Chemical Composition
The chemical composition of ASTM A106 pipes varies slightly between the three grades, as shown in the table below:
| Element | Grade A (%) | Grade B (%) | Grade C (%) |
| Carbon (C) | 0.25 max | 0.30 max | 0.35 max |
| Manganese (Mn) | 0.27-0.93 | 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 min | 0.10 min | 0.10 min |
Mechanical Properties
The mechanical properties of ASTM A106 pipes are critical for ensuring their performance under high-temperature conditions. The table below outlines these properties for each grade:
| Property | Grade A | Grade B | Grade C |
| Tensile Strength (MPa) | 330 min | 415 min | 485 min |
| Yield Strength (MPa) | 205 min | 240 min | 275 min |
| Elongation (%) | 35 min | 30 min | 30 min |
Steel Grade
ASTM A106 pipes are available in three grades:
- Grade A: Suitable for lower pressure and temperature applications.
- Grade B: The most commonly used grade, offering a good balance of strength and ductility.
- Grade C: Provides higher strength for more demanding applications.
Application
ASTM A106 seamless carbon steel pipes are widely used in:
- Oil and gas refineries
- Power plants
- Petrochemical plants
- Boilers
- High-pressure and high-temperature piping systems
Possible Alternative Grades
While ASTM A106 is a popular choice, there are alternative grades that may be considered based on specific requirements:
- ASTM A53: Another common specification for carbon steel pipes, suitable for lower temperature and pressure applications.
- ASTM A333: Designed for low-temperature service, offering better toughness at lower temperatures.
- ASTM A335: Alloy steel pipes for high-temperature service, providing enhanced strength and corrosion resistance.
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Q: Are you trading company or manufacturer ?
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