Comparison of bending properties of round tubes and square tubes

Basic introduction to carbon steel round tubes and square tubes:

Round pipes and square pipes are common metal pipes that are widely used in construction, machinery, transportation and other fields. Round pipes have a circular cross-section, while  square pipes have a square or rectangular shape. The production processes of round tubes and square tubes are different, so their flexible properties are also different.

Comparison of bending properties of round tubes and square tubes:

1. Bending radius

   Round pipes of the same material and wall thickness have a smaller bending radius than square pipes. This is because the cross-sectional shape of a round tube is circular, and the geometric properties of a circle make it easier to conform to curves when bent. The cross-sectional shape of a square tube is rectangular. When it is bent,  the inner and outer corners are offset, increasing the bend radius.

  2. Bending capacity

      Round pipes have a greater bending capacity than square pipes. This is because the cross-sectional shape of the round tube is round and the central axis is symmetrical, so the              bending force is uniform and its bearing capacity is relatively stable. The cross-sectional shape of the square tube is rectangular and the central axis is asymmetrical. A simple one          has a flat bottom and a curved top, which causes bending and plastic deformation, which reduces its bending strength.

Applicable occasions for round tubes and square tubes:

From the above analysis it can be seen that round tubes have advantages in bending performance compared to square tubes. Therefore, round tubes are more suitable for use in situations where frequent bending or pipe support and fixing is required. Square tubes are suitable for use in situations where compressive strength, torsional strength, shear strength, etc. are required. For example, square tubes are used in places such as building frames, consoles, doors and windows where loads and directional uncertainty are required.