ASTM A53 GR.A and GR.B Seamless Steel Pipe for Fluid Transportation:
Product Description: ASTM A53 GR.A and GR.B Seamless Steel Pipes are high-quality pipes designed for fluid transportation across various industries. These pipes are manufactured in accordance with the ASTM A53 standard, which specifies the requirements for seamless and welded steel pipes suitable for mechanical and pressure applications. The 'GR.A' and 'GR.B' designations refer to the specific grades of steel used, with GR.B offering a higher tensile strength than GR.A.
Product Parameter Specifications:
Parameter | Specification for GR.A and GR.B | Units |
Standard | ASTM A53 | - |
Grade | GR.A, GR.B | - |
Outer Diameter | Ranges from 1/8" to 26" | in |
Wall Thickness | Varies with diameter | in or mm |
Length | Standard lengths; custom available | ft or m |
Tolerance | As per ASTM A53 for dimensions | - |
Product Applications:
- Oil and Gas Industry: Used for transporting oil, natural gas, and water in pipelines.
- Hydrocarbon Processing: Suitable for refineries and petrochemical plants.
- Water Supply Systems: Employed in municipal and industrial water supply and distribution networks.
- Chemical Industry: Ideal for the transportation of chemicals and corrosive fluids.
- Piping Systems: Utilized in various industrial and commercial piping systems for fluid control.
Types of ASTM A53 Seamless Steel Pipes:
- GR.A: General-purpose pipe with a minimum tensile strength of 240 MPa.
- GR.B: Offers higher tensile strength, with a minimum of 290 MPa, suitable for more demanding applications.
Mechanical Properties:
Property | Specification for GR.A | Specification for GR.B | Units |
Tensile Strength | ≥ 240 MPa | ≥ 290 MPa | MPa |
Yield Strength | ≥ 205 MPa (for nominal thickness ≤ 0.5 in) | MPa | |
| ≥ 190 MPa (for nominal thickness > 0.5 in) | MPa | |
Elongation | ≥ 35% in 2 in or 50 mm length | % | |
Chemical Composition:
Element | Typical Range (%) for GR.A and GR.B |
Carbon (C) | 0.05-0.25 (GR.A), 0.05-0.30 (GR.B) |
Manganese (Mn) | 0.30-1.20 (GR.A), 0.30-1.60 (GR.B) |
Phosphorus (P) | ≤ 0.035 (GR.A), ≤ 0.035 (GR.B) |
Sulfur (S) | ≤ 0.045 (GR.A), ≤ 0.045 (GR.B) |


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