What's the difference between cold drawn steel tube and hot rolled steel tube?
Cold drawn steel tube is a kind of precision cold drawn seamless pipe used for mechanical structure and hydraulic equipment with high dimensional accuracy and good surface finish. The use of precision seamless tube manufacturing machinery structure or hydraulic equipment, etc., can greatly save the working hours of mechanical processing, improve material utilization, at the same time help improve product quality.
Hot rolling is relative to cold rolling, cold rolling is performed under recrystallization temperature, while hot rolling is rolling above recrystallization temperature.Seamless steel pipe, hot-rolled and cold-rolled (DIAL) seamless steel pipe two categories.Hot rolled steel tubes are divided into ordinary steel tubes, low and medium pressure boiler tubes, high pressure boiler tubes, alloy steel pipes, stainless steel pipes, oil cracking pipes, geological steel pipes and other steel pipes, etc..
Cold drawn steel tubes are produced by drawing, extruding, piercing and the like. The whole steel pipe has no seams. It's a round, square, rectangular steel with a hollow cross section without any seams. It is made of steel ingot or solid pipe blank by piercing and then made by cold casting.
