ASTM A500 Grade B Specifications
Specifications: ASTM A500 Grade B
Applications: Vehicle frames, roll cages, truck racks, trailers, railings, etc.
Processability: Easy to weld, cut, form, and machine
Mechanical Properties: Brinell Hardness = 63, Tensile Strength = 58,000 +/-, Yield Strength = 46,000 +/-
| 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 | 0.1 |
| 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 allowable variation of wall thickness
The minimum wall thickness at any measuring point on the pipe shall not be less than 10% of the specified wall thickness. The maximum wall thickness excluding welds of welded pipes shall not be greater than 10% of the specified wall thickness. For square and rectangular pipes, the wall thickness requirements apply only to the flat center.
Differences
There is no difference in materials and properties between ASTM A500 round pipes, ASTM A500 square pipes and ASTM A500 rectangular pipes, most of which are different in cross-sectional shape and purpose.
Square pipes are mostly used in the construction and machinery manufacturing industries;
Rectangular pipes are widely used as pipes for conveying fluids and for manufacturing mechanical parts and engineering structures, guns and cannons.
Compared with round pipes, square pipes have the characteristics of high compressive strength, light weight and wide range of applications.
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