ASTM A500 Rectangular Steel Tube for structural Description
A500 square tubing is typically made of low-carbon steel or low-alloy steel, processed through cold bending and welding. Its cross-sectional shape is square or rectangular, possessing a high section modulus and bending stiffness, meaning it can withstand greater external forces without easily deforming under the same weight. The surface of A500 square tubing is usually treated with galvanizing, spraying, or passivation to enhance corrosion resistance and extend its service life. It is important to note that different specifications of square tubing vary in wall thickness, side length, and overall length; users should select the appropriate product based on their specific needs.
Chemical Requirements
| Composition, % | ||||
|---|---|---|---|---|
| Element | Grades A, B and D | Grace C | ||
| Heat Analysis |
Product Analysis |
Heat Analysis |
Product Analysis |
|
| Carbon, max | 0.26 | 0.30 | 0.23 | 0.27 |
| Manganese, max | ... | ... | 1.35 | 1.40 |
| Phosphorus, max | 0.035 | 0.045 | 0.035 | 0.045 |
| Sulfur, max | 0.035 | 0.045 | 0.035 | 0.045 |
| Copper, when copper steel is specified, min |
0.20 | 0.18 | 0.20 | 0.18 |
Tensile Requirements
| Round Structural Tubing | ||||
|---|---|---|---|---|
| Grade A | Grade B | Grade C | Grade D | |
| Tensile strength, mn, ps (MPa) | 45 000 (310) |
58 000 (400) |
62 00 (427) |
58 000 (400) |
| Yield strength, mn, psi (MPa) | 33 000 (228) |
42 000 (290) |
46 000 (317) |
36 000 (250) |
| Elongation in 2 in. (50.8 mm), min, %A | 25B | 23C | 21D | 23C |
| Shaped Structural Tubing | ||||
|---|---|---|---|---|
| Grade A | Grade B | Grade C | Grade D | |
| Tensile strength, mn, ps (MPa) | 45 000 (310) |
58 000 (400) |
62 00 (427) |
58 000 (400) |
| Yield strength, mn, psi (MPa) | 39 000 (269) |
46 000 (317) |
50 000 (345) |
36 000 (250) |
| Elongation in 2 in. (50.8 mm), min, %A | 25B | 23C | 21D | 23C |
Applications
A500 square and rectangular structural tubes are widely utilized in various structural applications due to their high strength and precise dimensions, including but not limited to:
Building frameworks: They are used to construct the skeleton of buildings, providing support and stability.
Bridges and infrastructure: They serve as structural components in bridges, overpasses, and other infrastructure projects.
Machinery manufacturing: They are employed in the fabrication of machinery frameworks, conveyor systems, and equipment supports.
Fences and guardrails: Owing to their corrosion resistance and strength, they are commonly used in outdoor fences, guardrails, and barriers.
Test and inspection
Packaging and shipping
