Difference Between Hot Rolling and Cold Rolling of 16mn Square Tube

16mn square tube is a kind of steel processed under normal temperature environment through a series of cold drawing, cold bending and other technologies. Compared with the 16mn square tube, the hot-rolled tube is a kind of steel processed above the recrystallization temperature. There are many differences between 16mn square tube and hot-rolled tube, so I will introduce their differences to you in detail, so that everyone can understand.

The difference between 16mn square tube hot-rolled tube and cold-drawn tube:

When making a 16mn square tube, its section can have a certain degree of bending, and the bending is conducive to the bearing capacity of the 16mn square tube. However, when making a hot-rolled tube, its section must not be partially bent, which will affect its service life.

16mn square tube hot-rolled tube and cold-drawn tube difference two:

Because the production process of the 16mn square tube and the hot-rolled tube is different, the surface finish of their dimensional accuracy and precision is also different. Generally speaking, the precision of 16mn square tube is higher than that of hot-rolled tube, and the surface finish is also much better.

16mn square tube hot-rolled tube and cold-drawn tube difference three:

The production process of 16mn square tube and hot rolled tube is different. When the 16mn square tube is made and formed, it needs to go through the tube process, heat treatment, perforation technology, hot rolling process, head treatment, pickling process, phosphating treatment, cold drawing process, annealing treatment, straightening treatment, tube cutting process, As well as inspection of finished products, packaging and processing. The hot-rolled tube needs to be subjected to the tube process, heat treatment, piercing and forming, tube rolling treatment, sizing treatment, cooling bed treatment, straightening treatment, switching treatment, and final inspection and packaging. From these introductions, it can be seen that there are certain differences in their technological procedures.

The 16mn square tube is divided into seamless and welded seam. The seamless square tube is formed by extruding a seamless round tube. Mainly used in construction, machinery manufacturing, steel construction and other projects, shipbuilding, solar power brackets, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automobile chassis, airports, boiler construction, highway railings, housing construction , pressure vessels, oil storage tanks, bridges, power station equipment, lifting and transportation machinery and other welded structural parts with higher loads.