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Carbon square tubes is pultruded and have longitudinally-oriented fibers. The outer profile of these tubes is square, while the inner hole is square. The carbon square pipe is divided into seamless and welded seam. The seamless square pipe is formed by extruding the seamless round pipe. Square steel pipe, thick wall square steel pipe, large diameter square steel pipe, seamless square steel pipe, low alloy square steel pipe, 135 * 135 * 10 square steel pipe, square steel pipe for tower crane, Q345B low alloy square steel pipe, 20 # seamless square steel pipe. Both square carbon tube and rectangular carbon tube have radiused corners and flat sides approximately the same size as the tube ID. Corner radius will increase with wall thickness.
GK could offer below carbon square tubes as below table. While, besides these, GK can supply other sizes. Pls pass us your requirements.
500*500*8~25 carbon steel square tubing
140*140*4~14 carbon square pipe
135*135*4~14 carbon square pipe
130*130*4~12 carbon square pipe
450*450*8~25 carbon square pipe
120*120*4~12 carbon square pipe
400*400*8~25 carbon square pipe
110*110*4~12 carbon square pipe
350*350*8~25 carbon square pipe
100*100*4~12 carbon square pipe
300*300*8~25 carbon square pipe
80*80*4~12 carbon square pipe
280*280*8~25 carbon square pipe
60*60*4~12 carbon square pipe
250*250*8~25 carbon steel square tubing
50*50*4~12 carbon steel square tubing
220*220*8~25 carbon steel square tubing
40*40*4~10 carbon steel square tubing
200*200*8~25 carbon steel square tubing
30*30*2~6 carbon steel square tubing
| ID | ID | Wall | Wall |
| (mm) | (inches) | (mm) | (inches) |
| 10.0 | 0.3937 | 1.4 to 6.0 | 0.0551 to 0.2362 |
19.0 | 0.7480 | 1.4 to 6.0 | 0.0551 to 0.2362 |
20.0 | 0.7874 | 1.4 to 6.0 | 0.0551 to 0.2362 |
25.0 | 0.9843 | 1.4 to 6.0 | 0.0551 to 0.2362 |
| 28.0 | 1.1024 | 1.4 to 6.0 | 0.0551 to 0.2362 |
| 29.0 | 1.1417 | 1.4 to 6.0 | 0.0551 to 0.2362 |
| 30.0 | 1.1811 | 1.4 to 6.0 | 0.0551 to 0.2362 |
| 32.0 | 1.2598 | 1.4 to 6.0 | 0.0551 to 0.2362 |
| 35.0 | 1.3780 | 1.4 to 6.0 | 0.0551 to 0.2362 |
| 40.0 | 1.5748 | 1.4 to 6.0 | 0.0551 to 0.2362 |
| 45.0 | 1.7717 | 1.4 to 6.0 | 0.0551 to 0.2362 |
| 50.0 | 1.9685 | 1.4 to 6.0 | 0.0551 to 0.2362 |
| 65.0 | 2.5591 | 1.4 to 6.0 | 0.0551 to 0.2362 |
| 75.0 | 2.9528 | 1.4 to 6.0 | 0.0551 to 0.2362 |
| 100.0 | 3.9370 | 1.4 to 6.0 | 0.0551 to 0.2362 |
