The cylinder tube constitutes the outer shroud of a hydraulic cylinder and as such must withstand the internal pressure from the hydraulic fluid. In many instances, the cylinder tube must be welded and the weldability of the base steel is thus of some significance.

Tibnor stocks cylinder tubes in two executions. So-called RTU (ready-to-use) cold-drawn, welded tubes are quite thin-walled. Such offer an economical alternative for basic hydraulic systems where the pressure is relatively low. For more advanced systems with higher pressure, cold-drawn seamless tubes with greater wall thickness are available. These have been processed internally by skiving and roller-burnishing.