Hollow Section

Square Tube,SHS Steel

Hollow Section

Square Tube,SHS Steel
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Square Tube

Square Tube

Material of Square Tube
ASTM A500 Grade B,
ASTM A513 (1020-1026)
ASTM A36 (A36)
EN 10210:S235,S355,S235JRH,
S355J2H,S355NH EN 10219:S235,S355,S235JRH, 
S275J0H, S275J2H, S355J0H, S355J2H

Square Tube is a common metal pipe with a square or rectangular cross-sectional shape. In industrial production, square tubes are widely used in construction, machinery manufacturing, automobile manufacturing and other fields. The processing technology of square tubes has an important impact on the quality and performance of the product.


Square Tube are often used for columns, Square Tubes are often called “box sections”. An example is 100 x 100 x 10 SHS, which is 100 mm deep, 100 mm wide and the wall is 10 mm thick. Similar to Rectangular Tubes, hot rolled Square Tubes are made at the mill as one piece, whereas cold formed SHS are made of a flat sheet rolled at right angles and welded. It is therefore easy to note the difference, as the cold rolled Square Tubes have a weld all along their length.                                                                   
                                                                                    


Square tube sizes


Type Weight
[kg/m]
Height
[mm]
Width
[mm]
Wall
thickness
[mm]
20 x 20 x 2  1.1 20 20 2
20 x 20 x 2.5  1.3 20 20 2.5
25 x 25 x 2  14 25 25 2
25 x 25 x 2.5  1.7 25 25 2.5
25 x 25 x 3  2.0 25 25 3
30 x 30 x 2  1.7 30 30 2
30 x 30 x 2.5  2.1 30 30 2.5
30 x 30 x 3  2.5 30 30 3
40 x 40 x 2.5  2.9 40 40 2.5
40 x 40 x 3  3.4 40 40 3
40 x 40 x 3.2  3.6 40 40 3.2
40 x 40 x 3.6  4.0 40 40 3.6
40 x 40 x 4  4.4 40 40 4
40 x 40 x 5  5.3 40 40 5
50 x 50 x 2.5  3.7 50 50 2.5
50 x 50 x 3  4.4 50 50 3
50 x 50 x 3.2  4.6 50 50 3.2
50 x 50 x 3.6  5.1 50 50 3.6
50 x 50 x 4  5.6 50 50 4
50 x 50 x 5  6.9 50 50 5
50 x 50 x 6  8.0 50 50 6
50 x 50 x 6.3  8.3 50 50 6.3
60 x 60 x 2.5  4.5 60 60 2.5
60 x 60 x 3  5.3 60 60 3
60 x 60 x 3.2  5.6 60 60 3.2
60 x 60 x 3.6  6.3 60 60 3.6
60 x 60 x 4  6.9 60 60 4
60 x 60 x 5  8.4 60 60 5
60 x 60 x 6  9.9 60 60 6
60 x 60 x 6.3  10.3 60 60 6.3
60 x 60 x 8  12.5 60 60 8
70 x 70 x 3  6.2 70 70 3
70 x 70 x 3.2  6.6 70 70 3.2
70 x 70 x 3.6  7.4 70 70 3.6
70 x 70 x 4  8.2 70 70 4
70 x 70 x 5  10.0 70 70 5
70 x 70 x 6  11.8 70 70 6
70 x 70 x 6.3  12.3 70 70 6.3
70 x 70 x 8  15.0 70 70 8
80 x 80 x 3  7.2 80 80 3
80 x 80 x 3.2  7.6 80 80 3.2
80 x 80 x 3.6  8.5 80 80 3.6
80 x 80 x 4  9.4 80 80 4
80 x 80 x 5  11.6 80 80 5
80 x 80 x 6  13.6 80 80 6
80 x 80 x 6.3  14.2 80 80 6.3
80 x 80 x 8  17.8 80 80 8
90 x 90 x 5  13.1 90 90 5
90 x 90 x 6  15.5 90 90 6
90 x 90 x 6.3  16.2 90 90 6.3
90 x 90 x 8  20.1 90 90 8
100 x 100 x 3.6  10.8 100 100 3.6
100 x 100 x 4  11.9 100 100 4
100 x 100 x 5  14.7 100 100 5
100 x 100 x 6  17.4 100 100 6
100 x 100 x 6.3  18.2 100 100 6.3
100 x 100 x 8  22.6 100 100 8
100 x 100 x 10  27.4 100 100 10
120 x 120 x 4  14.4 120 120 4
120 x 120 x 5  18.0 120 120 5
120 x 120 x 6  21.2 120 120 6
120 x 120 x 6.3  22.2 120 120 6.3
120 x 120 x 8  27.6 120 120 8
120 x 120 x 10  33.7 120 120 10
120 x 120 x 12  39.5 120 120 12
120 x 120 x 12.5  40.9 120 120 12.5
140 x 140 x 5  21.0 140 140 5
140 x 140 x 6  24.9 140 140 6
140 x 140 x 6.3  26.1 140 140 6.3
140 x 140 x 8  32.6 140 140 8
140 x 140 x 10  40.0 140 140 10
140 x 140 x 12  47.0 140 140 12
140 x 140 x 12.5  48.7 140 140 12.5
150 x 150 x 5  22.6 150 150 5
150 x 150 x 6  26.8 150 150 6
150 x 150 x 6.3  28.1 150 150 6.3
150 x 150 x 8  35.1 150 150 8
150 x 150 x 10  43.1 150 150 10
150 x 150 x 12  50.8 150 150 12
150 x 150 x 12.5  52.7 150 150 12.5
150 x 150 x 16  65.2 150 150 16
160 x 160 x 5  24.1 160 160 5
160 x 160 x 6  28.7 160 160 6
160 x 160 x 6.3  30.1 160 160 6.3
160 x 160 x 8  37.6 160 160 8
160 x 160 x 10  46.3 160 160 10
160 x 160 x 12  54.6 160 160 12
160 x 160 x 12.5  56.6 160 160 12.5
160 x 160 x 16  70.2 160 160 16
180 x 180 x 5  27.3 180 180 5
180 x 180 x 6  32.5 180 180 6
180 x 180 x 6.3  34.0 180 180 6.3
180 x 180 x 8  42.7 180 180 8
180 x 180 x 10  52.5 180 180 10
180 x 180 x 12  62.1 180 180 12
180 x 180 x 12.5  64.4 180 180 12.5
180 x 180 x 16  80.2 180 180 16
200 x 200 x 5 SHS 30.4 200 200 5
200 x 200 x 6  36.2 200 200 6
200 x 200 x 6.3  38.0 200 200 6.3
200 x 200 x 8  47.7 200 200 8
200 x 200 x 10  58.8 200 200 10
200 x 200 x 12  69.6 200 200 12
200 x 200 x 12.5  72.3 200 200 12.5
200 x 200 x 16  90.3 200 200 16
220 x 220 x 6  40.0 220 220 6
220 x 220 x 6.3  41.9 220 220 6.3
220 x 220 x 8  52.7 220 220 8
220 x 220 x 10  65.1 220 220 10
220 x 220 x 12  77.2 220 220 12
220 x 220 x 12.5  80.1 220 220 12.5
220 x 220 x 16  100.0 220 220 16
250 x 250 x 5  38.3 250 250 5
250 x 250 x 6  45.7 250 250 6
250 x 250 x 6.3  47.9 250 250 6.3
250 x 250 x 8  60.3 250 250 8
250 x 250 x 10  74.5 250 250 10
250 x 250 x 12  88.5 250 250 12
250 x 250 x 12.5  91.9 250 250 12.5
250 x 250 x 16  115.0 250 250 16
260 x 260 x 6  47.6 260 260 6
260 x 260 x 6.3  49.9 260 260 6.3
260 x 260 x 8  62.8 260 260 8
260 x 260 x 10  77.7 260 260 10
260 x 260 x 12  92.2 260 260 12
260 x 260 x 12.5  95.8 260 260 12.5
260 x 260 x 16  120.0 260 260 16
300 x 300 x 6  55.1 300 300 6
300 x 300 x 6.3  57.8 300 300 6.3
300 x 300 x 8  72.8 300 300 8
300 x 300 x 10  90.2 300 300 10
300 x 300 x 12  107.0 300 300 12
300 x 300 x 12.5  112.0 300 300 12.5
300 x 300 x 16  141.0 300 300 16
350 x 350 x 8  85.4 350 350 8
350 x 350 x 10  106.0 350 350 10
350 x 350 x 12  126.0 350 350 12
350 x 350 x 12.5  131.0 350 350 12.5
350 x 350 x 16  166.0 350 350 16
400 x 400 x 8  97.9 400 400 8
400 x 400 x 10  122.0 400 400 10
400 x 400 x 12  145.0 400 400 12
400 x 400 x 12.5  151.0 400 400 12.5
400 x 400 x 16  191.0 400 400 16
400 x 400 x 20  235.0 400 400 20


Square tube processing technology

The processing technology of square tubes includes blanking, edge making, forming, welding, straightening, trimming, hair removal, rust prevention and other links. The first step is to cut the raw material steel plate or steel coil according to the required size to obtain a square tube of the required length. During the edge making process, the edges of the square tubes are processed through cutting, grooving, edging and other processes to ensure the flatness and dimensional accuracy of the edges.

In addition to the above processing technology, square pipes also need to be rust-proofed to extend their service life. Common anti-rust methods include spraying anti-rust paint, hot-dip galvanizing, chrome plating, etc. Spraying anti-rust paint is to spray a layer of anti-rust paint on the surface of the square pipe to isolate the air and water and prevent the square pipe from rusting. Hot-dip galvanizing is to immerse square pipes in molten zinc liquid to form a layer of zinc to prevent rust. Chrome plating is to coat the surface of the square tube with a layer of chromium to improve the corrosion resistance of the square tube.

During the processing of square tubes, you need to pay attention to the following points. First of all, the processing dimensions and tolerances are strictly controlled to ensure the dimensional accuracy of the square tube. Secondly, pay attention to protecting the surface of the square tube during processing to avoid scratches or damage. Thirdly, the welded joints must be comprehensively inspected to ensure the quality and strength of the welds. Finally, choose the appropriate material and processing technology according to the different uses of the square tube.

The processing technology of square tubes is crucial to the quality and performance of the product. Only through scientific and reasonable processing technology can we produce square tube products with excellent quality and precise dimensions. At the same time, attention should be paid to protecting the surface of the square tube during processing to prevent damage and rust.



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