It is a long strip of steel with a hollow section. It is divided into round tubes, square tubes, rectangular tubes, etc. according to the shape of the cross section. It is divided into seamless tubes and welded tubes according to different processing methods.
The metal is plastically formed and has a solid straight strip with a certain cross-sectional shape and size. According to its cross-sectional shape, it is divided into round steel, square steel, flat steel, angle steel, I-beam, H-shaped steel, channel steel and so on.
Refers to steel that is resistant to weak corrosive media such as air, steam, water, and chemically etched media such as acids, alkalis, and salts. also known as stainless acid-resistant steel. The corrosion resistance of stainless steel depends on the alloying elements contained in the steel.