ASTM A500 Cold Formed Tube Welded Carbon Steel Structural Tubing
For Structural Use
ASTM A500 is a standard specification for cold-formed welded and seamless carbon steel structural tubing in rounds and shapes. This specification is widely used in construction and structural applications due to its versatility, strength, and cost-effectiveness. The tubing is designed for structural applications where strength, weldability, and formability are critical.
Material
ASTM A500 tubing is made from carbon steel, which is known for its excellent strength-to-weight ratio and durability. The material is cold-formed, which enhances its mechanical properties and surface finish. The tubing is available in various shapes, including round, square, and rectangular, making it suitable for a wide range of structural applications.
Specification
ASTM A500 covers several grades of carbon steel tubing, each with specific mechanical and chemical properties. The specification ensures that the tubing meets the necessary standards for structural applications, including strength, ductility, and weldability.
Key Features
- Versatility: Available in multiple shapes and sizes.
- Strength: High strength-to-weight ratio.
- Weldability: Excellent weldability for structural applications.
- Durability: Resistant to wear and tear, suitable for long-term use.
- Cost-Effective: Economical choice for structural applications.
Chemical Composition
The chemical composition of ASTM A500 tubing varies by grade. Below is a table presenting the typical chemical composition for different grades:
| Element | Grade A (%) | Grade B (%) | Grade C (%) | Grade D (%) |
| Carbon (C) | 0.26 max | 0.30 max | 0.23 max | 0.27 max |
| Manganese (Mn) | 1.35 max | 1.35 max | 1.35 max | 1.35 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 |
| Copper (Cu) | 0.20 min | 0.20 min | 0.20 min | 0.20 min |
Mechanical Properties
The mechanical properties of ASTM A500 tubing are crucial for its performance in structural applications. The table below outlines the typical mechanical properties for different grades:
| Property | Grade A | Grade B | Grade C | Grade D |
| Tensile Strength (min) | 45 ksi | 58 ksi | 62 ksi | 58 ksi |
| Yield Strength (min) | 39 ksi | 46 ksi | 50 ksi | 50 ksi |
| Elongation (min) | 25% | 23% | 21% | 23% |
Steel Grade
ASTM A500 tubing is available in several grades, including Grade A, Grade B, Grade C, and Grade D. Each grade offers different mechanical properties, allowing engineers to select the appropriate grade based on the specific requirements of their project.
Application
ASTM A500 tubing is used in a variety of structural applications, including:
- Building construction
- Bridges
- Towers
- Frames
- Support structures
Its versatility and strength make it a popular choice for engineers and architects.
Possible Alternative Grades
While ASTM A500 is a widely used specification, there are alternative grades that may be suitable for certain applications:
- ASTM A513: Used for mechanical tubing applications.
- ASTM A36: Common structural steel grade.
- ASTM A1085: Enhanced version of A500 with tighter tolerances and improved properties.
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