Hot Rolled Seamless Tubing

Hot-rolled steel pipes are used for steel pipes. Hot rolling is relative to cold rolling. Cold rolling is rolling below the crystallization temperature, and hot rolling is rolling above the recrystallization temperature.

Seamless steel pipes for general use: are made of high-quality carbon steel such as 10, 20, 30, 3545, 16Mn, 5MnV and other low-alloy structural steels, or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other alloy steels are hot-rolled or cold-rolled. 10, 20 and other low carbon steel seamless pipes are mainly used for fluid conveying pipelines. Seamless tubes made of medium carbon steel such as 45 and 40Cr are used to manufacture mechanical parts, such as stressed parts of automobiles and tractors. Generally, seamless steel pipes are used to ensure strength and flattening tests. Hot-rolled steel pipes are delivered in a hot-rolled or heat-treated state; cold-rolled steel pipes are delivered in a heat-treated state.