In general, the width of the sheet is 500 to 1500 mm; the width is 600 to 3000 mm. The thin plates are divided into steel grades, such as ordinary steel, high-quality steel, alloy steel, spring steel, stainless steel, tool steel, heat-resistant steel, bearing steel, silicon steel and industrial pure iron sheet; according to professional use, there are oil drums, Enamel plate, bulletproof plate, etc.; according to the surface coating layer, steel sheet supplier there are galvanized sheet, tin plate, lead plate, plastic composite plate.
Alloy steel sheet properties:
With the development of science and technology and industry, higher requirements are placed on materials, such as higher strength, high temperature resistance, high pressure, low temperature, corrosion resistance, wear and other special physical and chemical properties. Carbon steel is no longer complete. fulfil requirements.
Insufficient carbon steel:
(1) The requirements for special performance cannot be met. Carbon steel is often poor in oxidation resistance, corrosion resistance, heat resistance, low temperature resistance, wear resistance and special electromagnetic properties, and cannot meet the needs of special performance.
(2) The strength and yield are relatively low. For example, the σs of ordinary carbon steel Q235 steel is 235 MPa, while the σs of low alloy structural steel 16Mn is 360 MPa or more. The σs /σb of 40 steel is only 0.43, which is much lower than that of alloy steel.
(3) Poor tempering stability. Due to the poor tempering stability, carbon steel needs to adopt a lower tempering temperature in order to ensure higher strength when quenching and tempering treatment, so that the toughness of steel is low; in order to ensure better toughness, high tempering Steel Wire is adopted. The strength at the time of temperature is low, so the comprehensive mechanical performance level of carbon steel is not high.
(4) Low hardenability. In general, the maximum hardenable diameter of carbon steel water quenching is only 10mm-20mm.