ASTM A53 Gr.A Gr.B Welded Steel Tube Black Hot-Dipped Zinc-Coated Welded Steel Tube For General Purpose
Material
ASTM A53 is a specification for pipe intended for mechanical and pressure applications, and is suitable for welding and bending. The specification covers both black and hot-dipped galvanized welded and seamless steel pipes.
Specification
The ASTM A53 specification includes two grades of steel: Grade A and Grade B. These grades differ in their chemical composition and mechanical properties.
Key Features
- Versatility: Suitable for a wide range of applications including structural and mechanical uses.
- Corrosion Resistance: Hot-dipped zinc coating provides excellent corrosion resistance.
- Weldability: Designed for welding, making it ideal for various construction and manufacturing processes.
- Availability: Widely available in different sizes and thicknesses.
Chemical Composition
| Element | Grade A (%) | Grade B (%) |
| Carbon (C) | 0.25 max | 0.26 max |
| Manganese (Mn) | 0.40 max | 0.40 max |
| Phosphorus (P) | 0.04 max | 0.04 max |
| Sulfur (S) | 0.05 max | 0.05 max |
| Copper (Cu) | 0.20 max | 0.20 max |
| Silicon (Si) | 0.10 - 0.40 | 0.10 - 0.40 |
| Nickel (Ni) | 0.40 max | 0.40 max |
| Chromium (Cr) | 0.40 max | 0.40 max |
Mechanical Properties
| Property | Grade A | Grade B |
| Yield Strength (ksi) | 30 | 35 |
| Tensile Strength (ksi) | 48 | 60 |
| Elongation (%) | 20 | 20 |
| Hardness (Rockwell) | B70 | B70 |
Steel Grade
- Grade A: Lower strength, suitable for non-critical applications.
- Grade B: Higher strength, suitable for more demanding applications.
Application
ASTM A53 welded steel tubes are commonly used in:
- Structural applications
- Plumbing and piping systems
- Oil and gas industries
- Mechanical applications
- General construction
Possible Alternative Grades
- ASTM A500: For cold-formed welded and seamless structural tubing.
- ASTM A252: For welded and seamless steel pipe piles.
- ASTM A106: For seamless carbon steel pipe for high-temperature service.
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