As the name suggests, rectangular tubes are hollow, long steel materials also referred to as flat tubes, flat square tubes, or square flat tubes. In the manufacturing of mechanical parts and engineering structures, it is commonly employed when the torsional and bending strengths are equal because it results in a lighter product.
Published by ASTM International, ASTM A500 is a standard specification for seamless and weldable carbon structural steel. Rectangular steel pipe, ASTM A500, is suitable for general structural applications such as bridges and buildings, and it can be fastened with bolts, rivets, or welding.
Tensile Properties of ASTM A500 Rectangular Tubes
| ASTM A500 Rectangular Tube | ||||
| Minimum stretch(Mpa) | 310 | 400 | 427 | 400 |
| Yield Strength (Mpa) | 269 | 317 | 345 | 250 |
| Minimum elongation per 50.8mm, %D | 25A | 13B | 21C | 23B |
Notes
A: Suitable for steel pipes with wall thickness (t) ≥ 3.05mm. For thinner steel pipes, the minimum elongation can be calculated by the following formula: Secondary length per 50.8mm = 56t+17.5, rounded to two decimal places.
B: Suitable for steel pipes with wall thickness (t) ≥ 4.57mm. For thinner steel pipes, the minimum elongation can be calculated by the following formula: Elongation per 50.8mm = 61t+12, rounded to two decimal places.
C: Suitable for steel pipes with wall thickness (t) ≥ 3.05mm. For thinner tubes, the minimum secondary length can be agreed with the manufacturer.
D: The specified minimum elongation is only a reference value for test experiments, not a technical standard for steel pipe trade.
Post time: Oct-13-2023