ASTM A500 Steel Cold Formed Seamless Carbon Steel Structural Tubing For Construction
Material and Specification
ASTM A500 is a standard specification for cold-formed welded and seamless carbon steel structural tubing in round, square, and rectangular shapes. This specification covers cold-formed welded and seamless carbon steel round, square, rectangular, or special shape structural tubing for welded, riveted, or bolted construction of bridges and buildings, and for general structural purposes. The tubing is produced in both seamless and welded forms.
Key Features
The ASTM A500 steel tubing offers several key features that make it suitable for construction purposes:
- Excellent strength-to-weight ratio: The carbon steel used in ASTM A500 tubing provides excellent strength while maintaining a relatively low weight, making it ideal for various structural applications.
- Versatility: This tubing is available in multiple shapes, including round, square, and rectangular, allowing it to be used in a wide range of construction projects.
- Cold-formed manufacturing: The cold-forming process used to produce ASTM A500 tubing results in improved tolerances, surface finish, and shape consistency.
- Durable and long-lasting: ASTM A500 tubing is known for its durability and resistance to corrosion, making it suitable for use in demanding construction environments.
- Cost-effective: Due to its availability and versatility, A500 steel tubing is often a cost-effective solution for construction projects.
Chemical Composition (Table Presentation)
The chemical composition of ASTM A500 steel tubing is as follows:
| Element | Composition |
| Carbon (C) | 0.26% max |
| Manganese (Mn) | ---- |
| Phosphorous (P) | 0.04% max |
| Sulfur (S) | 0.05% max |
Mechanical Properties (Table Presentation)
The mechanical properties of ASTM A500 steel tubing are specified as:
Round Structural Tubing:
| Property | Minimum Yield Strength | Minimum Tensile Strength | Minimum Elongation |
| Grade A | 39,000 psi (270 MPa) | 45,000 psi (310 MPa) | 25% |
| Grade B | 46,000 psi (315 MPa) | 58,000 psi (400 MPa) | 23% |
| Grade C | 50,000 psi (345 MPa) | 62,000 psi (425 MPa) | 21% |
| Grade D | 36,000 psi (250 MPa) | 58,000 psi (400 MPa) | 23% |
Rectangular and Square Structural Tubing:
| Property | Minimum Yield Strength | Minimum Tensile Strength | Minimum Elongation |
| Grade A | 39,000 psi (270 MPa) | 45,000 psi (310 MPa) | 25% |
| Grade B | 46,000 psi (315 MPa) | 58,000 psi (400 MPa) | 23% |
| Grade C | 50,000 psi (345 MPa) | 62,000 psi (425 MPa) | 21% |
| Grade D | 36,000 psi (250 MPa) | 58,000 psi (400 MPa) | 23% |
Steel Grade
ASTM A500 steel tubing is available in multiple grades, including Grade A, Grade B, Grade C, and Grade D. Each grade has specific mechanical properties and is suitable for different construction applications.
Application
The ASTM A500 tubing finds extensive use in various construction applications, including:
- Structural support for buildings and bridges
- Construction of frames and supporting structures
- General structural applications requiring strong and durable materials
- Signposts and highway structures
- Manufacturing of furniture, automotive components, and agricultural equipment
Possible Alternative Grades
While ASTM A500 steel tubing is widely used, there are alternative grades with similar characteristics that can be considered as well. Some potential alternatives to ASTM A500 include:
- ASTM A501: This specification covers hot-formed welded and seamless carbon steel structural tubing.
- ASTM A1085: A high-strength, low-alloy (HSLA) steel tubing specification that provides improved mechanical properties compared to A500.
- ASTM A513: Another specification for electric-resistance-welded carbon and alloy steel tubing, suitable for mechanical and pressure applications.
- ASTM A847: This specification covers cold-formed welded and seamless high-strength, low-alloy steel tubing for structural and architectural applications.
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