Classification of seamless steel pipe: seamless steel pipe is divided into two categories: hot rolled and cold rolled seamless steel pipe. Hot rolled seamless steel pipe is divided into general steel pipe, low pressure boiler steel pipe, medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe geological steel pipe and other steel pipe. Cold rolled seamless steel pipe in addition to general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, other steel pipe, also includes carbon thin-wall steel pipe, alloy thin-wall steel pipe, stainless thin-wall steel pipe, special-shaped steel pipe. The outer diameter of hot-rolled seamless pipe is generally greater than 32mm, and the wall thickness is 2.5-75mm. The outer diameter of cold-rolled seamless steel pipe can be up to 6mm, and the wall thickness can be up to 0.25mm. The outer diameter of thin-walled pipe can be up to 5mm, and the wall thickness is less than 0.25mm.
General seamless steel pipe: it is made of 10, 20, 30, 35, 45 and other carbon bonded steel 16Mn, 5MnV and other low alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other alloy steel hot rolled or cold rolled The seamless tubes are used to make mechanical parts, such as stressed parts for cars and tractors. Generally use seamless steel pipe to ensure the strength and flattening test. Delivery of hot-rolled steel pipes in hot-rolled or heat-treated condition; Cold rolled and delivered in heat-treated condition.
Post time: Feb-07-2023