square and rectangular steel tubing

If you are looking for the factory or suppliers of square and rectangular steel tube, now you get the right answer

rectangular steel tube
square steel tube

What is square and rectangular steel tube?

Square and rectangular steel tubes which means tubes with equal and unequal sides, are usually referred to as rectangular tube. It is made up of strip steel, after the process of unpacking, flatting, crimping, then welded into round tube, and then rolled into a rectangular shape, finally the tube would be cut into required length.

A500 steel tube A500 squar steel tube

With dense structure, excellent finishing technology and tiny tolerances, rectangular steel tube owns the characteristics of strong, tough, and sustained, which allows the tube be widely used in structural applications, agricultural, transportation and so on. In addition, rectangular steel tube can resist excessive temperatures, pressures and varies of climates.

According to the production process, the rectangular tube can be divided into: hot-rolled seamless tube, cold-drawn seamless tube, extruded seamless tube, and welded tube.

Thereinto, the welded rectangular tube is divided into two parts:

1. according to technology: arc welding square pipe, resistance welding square pipe (high frequency, low frequency), gas welding square pipe, furnace welding square pipe

2. according to the welding line: straight seam welded square pipe, spiral welded square pipe.

a500 steel stocks

Features of rectangular tube

  • High strength performance
  • Wide range of sizes
  • Excellent resistant ability of extreme temperatures, pressure and climate
  • Long lasting structural material
  • Will not warp


Item Details
Standard JIS, AISI, ASTM, GB, DIN, EN, etc.
Grade A106 Gr.B, Gr.C, 12Cr1MoV, 15CrMo,Q195,Q235,Q345, S40C,S45C, ST35,ST35.8,ST52,S335JR, S275J2, 16Mn, A36, A53
Thk Range 0.3mm~150mm
OD Range 6mm~2000mm
Length 6m, 5.8m, 12m or be required
Technique Electronic Resistance Welded (ERW)
Electronic Fusion Welded (EFW)
Double Submerged Arc Welded (DSAW)
Ends Plain
Thread with coupling or cap

The applications

the square and rectangular steel tube applications

As the rectangular steel tubes are strong, light and easy to weld, they are widely used in variety of industries such as:

  • Construction industry: general structure, mechanical, ship building, engineering building decoration, glass curtain wall,
  • Metallurgy industry: manufacture, container frame
  • Agricultural industry: greenhouse, furniture
  • Transportation industry: vehicles, railway, highway guardrail, motorcycle frame, gas, water, heating and other fluid transport

Manufacture process

Rectangular pipe manufacturing flow chart

Stock and warehouse

square and rectangular steel tube stocks square steel tube loading