The rectangular tube is a kind of low-alloy high-strength structural steel, which implements the new standard GB/T 1591-2018, where "Q" indicates the yield strength and 355 indicates that the yield strength of the steel is 355MPa, and the yield value will decrease according to the increase of the thickness of the material.
The manufacturing process of rectangular tubes mainly adopts rolling and welding processes. After the rolling process, the steel can obtain high strength. The steel plate is then subjected to heat treatment and welding processes to form a rectangular tube. In the production process, it is necessary to produce in strict accordance with national standards to ensure the quality and performance of steel pipes.
Rectangular tubes have a lot of advantages. First of all, it is very corrosion resistant and can be used in harsh environments. Secondly, it has very high strength, is able to withstand all kinds of heavy pressure, and has good shock resistance. In addition, it has easy welding, cold stamping, machinability, and good processing performance, and can be cut and processed in a variety of ways to meet different needs.
Rectangular tubes are used in engineering construction, glass curtain walls, door and window decoration, steel structures, guardrails, machinery manufacturing, automobile manufacturing, home appliance manufacturing, shipbuilding, containers, etc.
