Square Tube Dimension: 20mm*20mm-1000*1000mm

Rectangular Tube Dimension: 20mm*30mm-600mm*1000mm

Thickness:2mm-35mm

Length:6m-12m , or as per customer’s requirements

Standards: DIN EN10210,EN10219,GB/T3094-2000,ASTM A500,JIS G 3466,GB/T6728-2002

Steel Grades:Q195, Q235, Q345(16Mn), STKR400/490, A500, ST37/44/52, S235, S275, S355, etc.

Surface Treatment: anti-rust oil, black painting, galvanizing

Packing: in bundles with steel strips or in bulk as per customer request

Applications: Construction framework,  trestle, motorcar cassis,flight terminal framework, shipbuilding, automobile axle pipe, MRT and so on

The mostly used sizes ( for seamless and welded square steel pipe) are as below:

30 * 30 *( 2-4mm) —– 50 * 50 *( 2-5mm) —– 80 * 80 *( 3-10mm).

100 * 100 *( 3-16mm) —– 135 * 135 *( 4-16mm) —– 140 * 140 *( 4-18mm).

150 * 150 *( 4-20mm) —– 180 * 180 *( 5-20mm) —– 220 * 220 *( 6-20mm).

250 * 250 *( 5-25mm) —– 300 * 150 *( 6-20mm) —– 300 * 180 *( 8-20mm).

500 * 500 *( 8-25mm) —– 400 * 400*( 8-22mm) —– 450 * 450 *( 8-22mm).

300 * 200 *( 6-20mm) —– 350 * 300 *( 8-22mm) —– 350 * 350 *( 8-22mm).

400 * 250 *( 8-25mm) —– 450 * 300 *( 8-25mm) —– 450 * 480 *( 9-25mm).

500 * 300 *( 8-25mm) —– 600*400*(8-30mm)

If you have any interest, please don't hesitate to contact us e-mail brsteel@aliyun.com.