Cangzhou Zhongrun Steel Tube Co.,Ltd is a large- scale enterprise engaged in producing , processing and sales steel pipes in North China.It is of convenient transportation as it is only 150 km away from Xingang,Tianjin,China.
The company maintains two subsidiary companies , which include Cangzhou Hengchang Steel Pipe Manufacturing Co.,Ltd and Cangzhou Tianyu Steel Pipe Manufacturing Co.,Ltd.
Our products mainly include seamless steel pipe, hot-finished steel pipe, longitudinal welded pipeand pipe fittings.
With powerful financial strength, advanced managerial concept, excellent marketing service, strict quality control system and the whole scientific method, we would like to develop together with your hand in hand.
Welded Chemical Composition
| Pipe/Steel grade | C(%)≤ | Mn(%)≤ | P(%)≥ | P(%)≤ | S(%)≤ | V(%)≤ | Nb(%)≤ | Ti(%)≤ |
| L210/A | 0.22 | 0.9 | 0.03 | 0.03 | ||||
| L245/B | 0.26 | 1.2 | 0.03 | 0.03 | c,d | c,d | d | |
| L290/X42 | 0.26 | 1.3 | 0.03 | 0.03 | d | d | d | |
| L320/X46 | 0.26 | 1.4 | 0.03 | 0.03 | d | d | d | |
| L360/X52 | 0.26 | 1.4 | 0.03 | 0.03 | d | d | d | |
| L390/X56 | 0.26 | 1.4 | 0.03 | 0.03 | d | d | d | |
| L415/X60 | 0.26 | 1.4 | 0.03 | 0.03 | f | f | f | |
| L450/X65 | 0.26 | 1.45 | 0.03 | 0.03 | f | f | f | |
| L485/X70 | 0.26 | 1.65 | 0.03 | 0.03 | f | f | f | |
| a.Cu≤0.5%;Ni≤0.5%;Cr≤0.5% and Mo≤0.15% | ||||||||
| c.Unless otherwise agreed,Nb+V≤0.06% | ||||||||
| d.Nb+VT+Ti≤0.15% | ||||||||
| f.Unless otherwise agreed,Nb+V+Ti≤0.15% | ||||||||
| g.No deliberate addition of B is permitted and the residual B≤0.001% | ||||||||
Tensile Properties
| Pipe/Steel Grade | Yield Strength (Mpa/psi)≥ | TensileStrength(Mpa/psi)≥ |
| L210/A | 210(30500) | 335(48600) |
| L245/B | 245(35500) | 415(60200) |
| L290/X42 | 290(42100) | 415(60200) |
| L320/X46 | 320(46400) | 435(63100) |
| L360/X52 | 360(52200) | 460(66700) |
| L390/X56 | 390(56600) | 490(71100) |
| L415/X60 | 415(60200) | 520(75400) |
| L450/X65 | 450(65300) | 535(77600) |
| L485/X70 | 485(70300) | 570(82700) |
