ASTM A500 Gr B Cold Formed Welded Structural Square Tubing description
ASTM A500 Standard: This is a specification set by ASTM International for cold-formed welded and seamless carbon steel structural tubing in rounds, squares, and rectangles. It outlines the requirements for mechanical properties, chemical composition, and other characteristics.
Grade B (GRB): This refers to the specific grade within the ASTM A500 standard, which has its own set of requirements for tensile strength, yield strength, and elongation.
Cold-Formed Welded Pipe: This indicates that the pipe is made by welding together steel strips or coils that have been shaped into a circular, square, or rectangular cross-section at room temperature through a cold-forming process.
ASTM A500 Gr B Cold Formed Square Hollow Section Chemical Composition
| ASTM A500 | C, max | P, max | S, max | Cu, min |
| Grade B | 0.26 | 0.035 | 0.035 | 0.20 |
ASTM A500 Gr B Cold Formed Structural Square Hollow Section Mechanical Properties
| ASTM A500 | Tensile strength, min | Yield strength, min, | Elongation in 2 in. (50.8 mm) min, % |
| Grade B | 400 MPa, 58 000 psi | 317 MPa, 46 000 psi | 23 |
Outside Dimension Tolerances For Square and Rectangular Structural Tubing
| Outside Large Flat Dimension, in. (mm) | Large Flat Dimension Tolerance, A plus and minus, in. (mm) |
|---|---|
| 2½ (63.5) or under | 0.020 (0.51) |
| Over 2½ to 3½ (63.5 to 88.9), incl | 0.025 (0.64) |
| Over 3½ to 5½, inc | 0.030 (0.76) |
| Over 5½ (139.7) | 0.01 times large flat dimension |
Applications
A500 GRB cold-formed welded pipe is widely used in a variety of structural applications, such as:
Building construction (e.g., frames, columns, beams)
Infrastructure projects (e.g., bridges, overpasses)
Industrial equipment and machinery
Fences, railings, and other safety barriers
Test and inspection
Packaging and shipping
