A500 Grade A, B & C Tubing
Valmont Tubing produces square, rectangle, round and special shaped electric resistance welded (ERW) carbon steel tubing to meet ASTM specifications A500 Grade A, Grade B and Grade C often used in structural applications. The purpose and strength levels required will determine which grade is required. Valmont does not produce tubing to meet the Grade D specification. For a complete listing of all tubing sizes produced by Valmont, please visit our Steel Tubing Product Catalog.
Square & Rectangle Tubing
Below are physical properties required to meet the three grades that we produce ASTM A500 square, rectangle and special shaped tubing to. A flattening test is not a standard requirement for non-round tubing produced to A500.
| Grade |
Yield (min) |
Tensile (min) |
Elongation (min) |
| Grade A |
39,000 psi |
45,000 psi |
Determined by wall |
| Grade B |
46,000 psi |
58,000 psi |
Determined by wall |
| Grade C |
50,000 psi |
62,000 psi |
Determined by wall |
Round Tubing
Below are physical properties required to meet the three grades that we produce ASTM A500 round tubing to. A flattening test is also a standard requirement for round tubing produced to the A500 specification.
| Grade |
Yield(min) |
Tensile (min) |
Elongation (min) |
| Grade A |
33,000 psi |
45,000 psi |
Determined by wall |
| Grade B |
42,000 psi |
58,000 psi |
Determined by wall |
| Grade C |
46,000 psi |
62,000 psi |
Determined by wall |
Specification Notes
- According to ASTM A500, the weld seam location for square, rectangle and other specially shaped tubing shall not be located within the corner radius, unless specified by the customer or manufacturer.
- Under ASTM A500, the corner radius for square and rectangular tubing shall not exceed three times the corner radius.
- As a standard under ASTM A500, electric resistance welded tubing is normally provided without removal of inside flash. If flash control is required, please specify at time of quotation or order placement.
- ASTM A847 is a related structural specification that covers high-strength low alloy atmospheric corrosion-resistant steel tubing. Please refer to the ASTM A847 page for more information.
- For more detailed information on the A500 specification and to purchase a copy of it, please visit the ASTM website.
Please contact one of our knowledgeable sales staff members, who will assist you with any further questions regarding this specification or with your specific tubing requirements.