Square tube, is a kind of square steel tubes, that is, equal width and length.

1. Square tube product description

Square tube is a hollow rectangular light thin wall cross section steel tube, also known as steel cooling bending profiles. Based on parent metal of the hot rolled or cold rolled steel strip or plate, after cold bending, it is formed into square cross section shape size section steel by high frequency welding. Angle size and sides straightness of hot-rolled special thick-walled square tube reaches, sometimes even exceed level of resistance welding cold forming square tube level.

2. Square tube use

It can be used in construction, machinery manufacturing, steel construction, shipbuilding, solar power stents, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain wall, automobile chassis, airport, the boiler construction, highway fence and building construction, etc.

Square tube

Type	Theory weight (kg/m)	Type	Theory 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