Hot-rolled steel plates on automobiles require rim, wheel disc and cover plate to have certain strength, low stress and low surface requirements, in addition to frame longitudinal beam, cross beam and various supports.

The former is a steel plate with a thickness of 3-5 mm, and the latter is used for medium and thin plates. Hot rolled plates for automobiles are mostly thick plates. In the standard of hot SLSN plate for automobile made by Japan Automobile Association, SAPH is used as the cross beam and wheel of automobile, while SPH is used for hot rolling mild steel plate to make stress-free shell.

Automobile steel plates are divided into hot rolled steel plates, cold rolled steel plates and coated steel plates according to the production process characteristics. In terms of strength, it can be divided into: ordinary steel plate (mild steel plate), low-alloy high-strength steel plate (HSLA), ordinary high-strength steel plate (high-strength IF steel, BH steel, phosphorus-containing steel and IS steel) and advanced high-strength steel plate (AHSS).

Type:

Steel plates are usually divided into three types according to their thickness: thick plate (above 6mm), medium plate (3-6mm) and thin plate (below 3mm).

As far as plate-making technology is concerned, low-carbon steel plates can be divided into cold rolling and hot rolling. Only hot rolling can produce 1.2mm low-carbon steel plate and 2mm stainless steel plate, and thinner plates are made by cold rolling, annealing and tempering rolling.