ASTM A226 GrA2 GrA1 GrB2 GrC High Pressure Steel Tube ERW Steel Carbon Steel Tube For High Pressure Service
Material Specification
ASTM A226 is a specification that covers electric-resistance-welded (ERW) carbon steel tubes intended for high-pressure service. These tubes are designed to withstand high pressure and are commonly used in various industries, including power generation, petrochemical, and oil and gas. The specification ensures that the tubes meet stringent quality and performance standards, making them suitable for demanding applications.
Key Features
- High Pressure Resistance: Designed to withstand high-pressure environments.
- ERW Construction: Electric-resistance-welded for enhanced strength and durability.
- Versatile Applications: Suitable for use in various industries, including power generation and petrochemical.
- Quality Assurance: Manufactured to meet ASTM standards, ensuring reliability and performance.
Chemical Composition
The chemical composition of ASTM A226 steel tubes is critical to their performance. The following table presents the typical chemical composition for these grades:
| Element | GrA1 (%) | GrA2 (%) | GrB2 (%) | GrC (%) |
| Carbon (C) | 0.27 max | 0.27 max | 0.27 max | 0.27 max |
| Manganese (Mn) | 0.93 max | 0.93 max | 0.93 max | 0.93 max |
| Phosphorus (P) | 0.035 max | 0.035 max | 0.035 max | 0.035 max |
| Sulfur (S) | 0.035 max | 0.035 max | 0.035 max | 0.035 max |
Mechanical Properties
The mechanical properties of ASTM A226 steel tubes ensure they can handle high-pressure applications. The following table outlines the typical mechanical properties:
| Property | GrA1 | GrA2 | GrB2 | GrC |
| Tensile Strength (MPa) | 330 min | 330 min | 330 min | 330 min |
| Yield Strength (MPa) | 205 min | 205 min | 205 min | 205 min |
| Elongation (%) | 30 min | 30 min | 30 min | 30 min |
Steel Grade
ASTM A226 includes several grades, such as GrA1, GrA2, GrB2, and GrC, each designed to meet specific requirements for high-pressure service. The choice of grade depends on the specific application and the required mechanical and chemical properties.
Application
ASTM A226 steel tubes are used in various high-pressure applications, including:
- Power Generation: Boilers and heat exchangers.
- Petrochemical Industry: Process piping and pressure vessels.
- Oil and Gas: Transporting high-pressure fluids and gases.
Possible Alternative Grades
While ASTM A226 is a popular choice for high-pressure applications, there are alternative grades that may be considered based on specific requirements:
- ASTM A106: Seamless carbon steel pipe for high-temperature service.
- ASTM A53: Standard specification for pipe, steel, black and hot-dipped, zinc-coated, welded, and seamless.
- ASTM A333: Seamless and welded steel pipe for low-temperature service.
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