ASTM A500 is a standard specification for cold-formed welded and seamless carbon steel structural tubing in round, square and rectangular shapes.
Specifications: ASTM A500 Grade B
Applications: frames, roll cages, truck racks, trailers, railings, etc.
Workability: Easy to Weld, Cut, Form and Machine
Mechanical Properties: Brinell = 63, Tensile = 58,000 +/-, Yield = 46,000 +/-
Typical Permissible Variations in Wall Thickness
The minimum wall thickness at any point of measurement on the tubing shall be not more than 10% less than the specified wall thickness. The maximum wall thickness, excluding the weld seam of welded tubing, shall be not more than 10% greater than the specified wall thickness. For square and rectangular tubing, the wall thickness requirements shall apply only to the centers of the flats.
Specifications: ASTM A500 Grade B
Applications: frames, roll cages, truck racks, trailers, railings, etc.
Workability: Easy to Weld, Cut, Form and Machine
Mechanical Properties: Brinell = 63, Tensile = 58,000 +/-, Yield = 46,000 +/-
| Typical Chemical Properties | ||||
| Grades A, B, and D – Heat analysis | Grades A, B, and D – Product analysis | Grade C – Heat analysis | Grade C – Product analysis | |
| Carbon, maximum % | 0.26 | 0.3 | 0.23 | 0.27 |
| Manganese, maximum % | 1.35 | 1.4 | 1.35 | 1.4 |
| Phosphorous, maximum, % | 0.035 | 0.045 | 0.035 | 0.045 |
| Sulfur, maximum, % | 0.035 | 0.045 | 0.035 | 0.045 |
| Copper, minimum (if Copper-containing steel is specified in the purchase order) % | 0.2 | 0.18 | 0.2 | 0.18 |
| Typical Mechanical Properties | ||||
| Round Structural Tubing | Grade A | Grade B | Grade C | Grade D |
| Tensile Strength, Minimum, psi [Mpa] | 45,000 [310] | 58,000 [400] | 62,000 [425] | 58,000 [400] |
| Yield Strength, Minimum, psi [Mpa] | 33,000 [230] | 42,000 [290] | 46,000 [315] | 36,000 [250] |
| Shaped Structural Tubing | Grade A | Grade B | Grade C | Grade D |
| Tensile Strength, Minimum, psi [Mpa] | 45,000 [310] | 58,000 [400] | 62,000 [425] | 58,000 [400] |
| Yield Strength, Minimum, psi [Mpa] | 39,000 [270] | 46,000 [315] | 50,000 [345] | 36,000 [250] |
Typical Permissible Variations in Wall Thickness
The minimum wall thickness at any point of measurement on the tubing shall be not more than 10% less than the specified wall thickness. The maximum wall thickness, excluding the weld seam of welded tubing, shall be not more than 10% greater than the specified wall thickness. For square and rectangular tubing, the wall thickness requirements shall apply only to the centers of the flats.
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