Comparison of bending properties of round tubes and square tubes

Basic introduction to carbon steel round tubes and square tubes:

Round tubes and square tubes are common metal pipes, widely used in construction, machinery, transportation and other fields. The cross-sectional shape of round tubes is circular, while the cross-sectional shape of square tubes is square or rectangular. The manufacturing processes of round tubes and square tubes are different, so their bending properties are also different.

Comparison of bending properties of round tubes and square tubes:
1. Bending radius

For the same material and wall thickness, round tubes have a smaller bending radius than square tubes. This is because the cross-sectional shape of the round tube is circular, and the geometric characteristics of the circle make it easy to adapt to curves when bent. The cross-sectional shape of the square tube is rectangular. When it is bent, there will be a deviation in the internal and external angles, thereby increasing the bending radius.

2. Bending capacity
Round tubes have higher bending capacity than square tubes. This is because the cross-section shape of the round pipe is circular and the central axis is symmetrical, so the force is even when bending, and its load-bearing capacity is relatively stable. The cross-sectional shape of the square tube is rectangular and the central axis is asymmetrical. It is easy to have a flat bottom and a convex top, which leads to buckling and plastic deformation during bending, thereby reducing its bending load-bearing capacity.

Applicable occasions for round tubes and square tubes:
According to the above analysis, it can be seen that round tubes have advantages in bending performance compared to square tubes. Therefore, round pipes are more suitable for use in situations where frequent curve bending or pipe support and fixation are required. Square tubes are suitable for use in situations where pressure resistance, torsion resistance, shear resistance, etc. are required. For example, square tubes are needed in places such as building frames, brackets, doors and windows that need to bear loads and direction uncertainty.

Conclusion:

To sum up, there are differences in bending properties between round tubes and square tubes. Although round pipes have small bending radius and high bearing capacity, they are more suitable for use in curved bends or pipe support and fixed situations; square pipes are suitable for bearing loads in many different directions and forms. In practical applications, appropriate pipe materials need to be selected according to their respective characteristics to ensure project quality and safety.

Tips: ASTM A500 is a standard specification for cold-formed welded and seamless carbon steel structural tubing in round, square tube and rectangular tube shapes.

ASTM A500 steel pipes can be subjected to most of the usual fabricating operations. Ductility is good. It bends well, flattens, cuts, punches, flares and flanges easily, and can be welded by the commonly-used techniques and practices.