Square Steel Tube

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Introduction
The square steel tube is a name for square pipe, which refers to the structural steel tube with equal side length. It is a thin-walled hollow square cross-section light pipe, also known as steel cold-formed profiles. The steel pipe takes the Q235 hot rolled or cold-rolled steel strip or coil as the base material. Then the material is formed into square section profile by cold bending and high-frequency welding.

The special thick-walled hot-rolled square tube has a thicker wall. But it shares the same or even better corner size and edge flatness with the ERW cold formed square tube.

Application
The square steel tube is used in the following fields: buildings, machinery manufacturing, steel construction projects, shipbuilding, solar power bracket, steel structure engineering, electrical engineering, power plants, agricultural and chemical machinery, glass curtain wall, car chassis, airport, boiler construction, highway railings and so on.

Theoretical Weight

Specification	Theoretical Weight (kg/m)	Specification	Theoretical Weight (kg/m)
20×20×1.2	0.75	50×30×2.5	3.02
25×25×1.2	0.94	50×30×3	3.6
40×40×2	2.29	50×32×2	2.2
40×40×2.5	3.02	50×35×2.5	3.32
40×40×4	4.68	55×38×2	2.8
50×50×2.5	3.81	60×40×2.5	3.81
50×50×3	4.44	60×40×3	4.44
50×50×4	5.74	60×40×4	5.74
60×60×2.5	4.52	70×50×4	7.02
60×60×3	5.38	80×60×3	7.09
60×60×4	7.02	80×60×4	8.22
70×70×4	8.22	80×60×5	10.25
70×70×5	10.2	90×40×2.5	5.19
80×80×4	9.96	90×60×5	10.47
80×80×6	13.85	100×60×3	7.3
100×100×4	11.65	100×60×4	9.16
100×100×8	23	100×60×5	11.53
120×120×4	14.16	100×60×4.5	14.41
160×160×4.5	19.2	160×80×4.5	15.84
220×80×6	27.1