Turn square tube - how do you do that?


Due to their shape, square tubes can only be extremely difficult and to a small extent bend. How to do it, who does it and what to look for, is fully informed by the following article.

Turn square tubes yourself

Can square tubes bend themselves? Only very limited. But under certain conditions this is possible.

Requirements for self-bending

  • low wall thickness
  • suitable material
  • small bends with large to very large radii
  • not too big dimensions of the pipe

Square tubes - actually rectangular rectangular profiles - can be bent if they have small wall thicknesses and are made of a suitable material that allows cold bending.

But bends go only with very large radii, a narrower bend, especially in hollow sections, can not be made even.

Professional bending of rectangular profiles

For the execution of such work, there are companies that specialize in the bending of workpieces. Such specialist companies make use of the roll bending process for square tubes in most cases.

This can be rolled to a certain extent and up to certain radii and rectangular profiles. Depending on the material and material properties, either hot or cold bending processes are used. Round rollers are normally not suitable for the forming of rectangular hollow sections.

The cost of such bends depends on the material, the dimensions of the workpiece and the wall diameter. For the smaller companies, even individual pieces are bent to a desired radius.

Bend at 90 degrees angle

When it comes to laying a rectangle hollow profile around a 90 degree corner, there is also another option. The two corner pieces can be cut apart at the required location, and then a matching corner piece can be welded.

But it must be welded clean and measured very accurately. Such work can also be done by simple locksmiths. In many cases, this type of forming is sufficient for rectangular profiles as well.

Tips & Tricks

In many cases, there are also suitable for individual hollow profiles connectors made of plastic, which are easily plugged. Even so, rectangular profiles or square tubes can sometimes be connected across corners when materials are difficult to connect by welding.


Video Board: Seamless steel tubes production process