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.
The ASTM A500 steel tubing offers several key features that make it suitable for construction purposes:
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 |
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% |
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.
The ASTM A500 tubing finds extensive use in various construction applications, including:
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:
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