ASTM A500 Grade A RHS vS B RHS
The A500 specification covers cold-formed welded and seamless carbon steel structural tubes of round, square, rectangular, or special shapes used for welding, fixing, or load-bearing in bridges, buildings, and general structures.
Welded or seamless tubes manufactured according to this specification must not have an outer circumference exceeding 64 inches (1626 mm) and a wall thickness not exceeding 15.88 mm.
Chemical Composition Comparison
| Element | A500 Grade A | A500 Grade B |
|---|---|---|
| C | ≤0.26% | ≤0.26% |
| Mn | ≤1.00% | ≤1.35% |
| P/S | ≤0.035% | ≤0.035% |
Mechanical Properties Comparison
| Property | A500 Grade A | A500 Grade B |
|---|---|---|
| Yield Strength | ≥235 MPa | ≥317 MPa |
| Tensile Strength | ≥400 MPa | ≥400 MPa |
| Elongation | ≥21% | ≥23% |
Mechanical Performance Comparison
| Property | A500 Grade A | A500 Grade B |
|---|---|---|
| Cold Bending Performance | Moderate | Excellent (suitable for complex sections) |
| Impact Toughness | No explicit requirements | Can be supplemented (e.g., A1085) |
| Engineering Recommendation | Economical structures | Preferred for load-bearing structures |
A500 GRA GRB Hollow Section factory
