Looking for a lightweight and durable steel tube for your next project? Look no further than rectangular tube!

This versatile steel tube is made from Q235 hot-rolled or cold-rolled steel strip or coil plate, and is perfect for a wide range of applications.

Whether you’re building a new structure or repairing an existing one, rectangular tube is the perfect choice for your needs.

With its hollow square section and high-frequency welded construction, this steel tube is both strong and lightweight, making it easy to work with and transport. And with a variety of sizes and thicknesses to choose from, you’re sure to find the perfect rectangular tube for your project.

So why wait? Check out our handy weight chart and start exploring all the possibilities of rectangular tube today!

## What Is Rectangular Tube?

Rectangular tube is a light-weight, thin-walled steel tube with a hollow square section, also referred to as a steel cold-formed section.

The tube is made of Q235 hot-rolled or cold-rolled steel strip or coil plate as the base material.

The material undergoes cold bending and forming, followed by high-frequency welding to produce a square cross-sectional shape and size.

The wall thickness of hot-rolled extra thick wall square pipe is thicker, and its corner size and edge flatness even exceed the level of resistance welded cold formed square pipes.

## Types of Rectangular Tube

Steel pipes can be classified into two types: seamless steel pipes and welded steel pipes (also known as seamless pipes).

Within the category of seamless pipes, there are hot-rolled seamless square pipes, cold-drawn seamless square pipes, extruded seamless square pipes. Welded square pipes are also available.

Welded square pipes can be further divided based on their manufacturing process:

- Arc welding square pipe
- Resistance welding square pipe (high frequency and low frequency)
- Gas welding square pipe
- Furnace welding square pipe

Additionally, welded square pipes can be categorized based on the type of weld seam:

- Straight welded square pipe
- Spiral welded square pipe.

## How to Calculate the Weight of Rectangular Tube?

The weight calculation formula of rectangular tube is:

**2[(a-d-2r+π(r+d/2)/2+(b-d-2r+π(r+d/2)/2)x7.85d(kg)**

a, b is the length and width of the rectangular tube (m), r is the arc radius of the four corners of the inner cavity of the tube (m), and d is the wall thickness (mm).

## Rectangular Tube Weight Calculator

According to GB/T 3094-2012, the typical length of a rectangular steel pipe is between 2000mm to 9000mm. The pipes can be supplied in fixed or double lengths.

In the market, rectangular steel pipes can be supplied based on either actual weight or theoretical weight. When supplied based on theoretical weight, the density of the steel pipe is assumed to be 7.85g/cm^{3}.

You can use a rectangular steel pipe weight calculator to determine the weight of the pipe.

## Rectangular Tube Weight Chart

Size (mm) | Weight | ||

b1（length） | b2（width） | t（thickness） | kg/m |

50 | 25 | 1.2 | 1.37 |

1.5 | 1.7 | ||

30 | 2.5 | 2.94 | |

3 | 3.49 | ||

4 | 4.52 | ||

60 | 30 | 2.5 | 3.34 |

3 | 3.96 | ||

4 | 5.15 | ||

40 | 2.5 | 3.73 | |

3 | 4.43 | ||

4 | 5.78 | ||

70 | 50 | 3 | 5.37 |

4 | 7.03 | ||

5 | 8.64 | ||

80 | 40 | 2.5 | 4.51 |

3 | 5.37 | ||

4 | 7.03 | ||

5 | 8.64 | ||

60 | 3 | 6.31 | |

4 | 8.29 | ||

5 | 10.21 | ||

90 | 40 | 3 | 5.84 |

4 | 7.66 | ||

5 | 9.42 | ||

50 | 3 | 6.31 | |

4 | 8.29 | ||

5 | 10.21 | ||

60 | 3 | 6.78 | |

4 | 8.92 | ||

5 | 10.99 | ||

100 | 50 | 3 | 6.78 |

4 | 8.92 | ||

5 | 10.99 | ||

120 | 60 | 3 | 8.2 |

4 | 10.8 | ||

5 | 13.35 | ||

6 | 15.83 | ||

80 | 3 | 9.14 | |

4 | 12.06 | ||

5 | 14.92 | ||

6 | 17.71 | ||

140 | 80 | 4 | 13.31 |

5 | 16.48 | ||

6 | 19.59 | ||

150 | 100 | 4 | 15.2 |

5 | 18.84 | ||

6 | 22.42 | ||

8 | 29.39 | ||

160 | 80 | 4 | 14.57 |

5 | 18.05 | ||

6 | 21.48 | ||

8 | 28.13 | ||

180 | 100 | 4 | 17.08 |

5 | 21.2 | ||

6 | 25.25 | ||

8 | 33.16 | ||

200 | 100 | 4 | 18.34 |

5 | 22.77 | ||

6 | 27.13 | ||

8 | 35.67 |