How much is 2 millimeters per square meter?
The performance of carbon steel mainly has the following deficiencies:(1) hardenability is low. Under normal circumstances, the maximum quenching diameter of carbon steel water quenching is only 10mm-20mm.(2) strength and yield strength are relatively low, such as the s of ordinary carbon steel Q235 is 235MPa, while that of low alloy structural steel 16Mn is 360MPa and above s. The sigma S / sigma B of steel 40 is only 0.43, much lower than that of alloy steel.(3) the stability of tempering tempering stability, carbon steel in quenching and tempering treatment, in order to ensure the high strength with the tempering temperature is lower, so the toughness of the steel is lower; in order to ensure good toughness, with high tempering temperature strength is low, the mechanical properties of carbon steel level is not high.(4) stainless steel can not meet the requirements of special performance. Carbon steel is often poor in oxidation resistance, corrosion resistance, heat resistance, low temperature resistance, wear resistance and special electromagnetic properties, and can not meet the needs of special performance.
With the development of science and technology and industry, put forward higher requirements on the materials, such as high strength, high temperature, high pressure, low temperature, corrosion resistance, wear and other special physical and chemical properties, carbon steel has not fully meet the requirements.
GB two mm steel plate per square weight of about 15.7 kilograms, converted into per square should be 80-100 yuan.Steel plate is made of molten steel, cooled and compressed into flat steel. Steel plate by thickness, thin steel plate <4 mm (thinnest 0.2 mm), thick steel plate 4~60 mm, extra thick steel plate 60~115 mm. The steel plate is divided into hot-rolled and cold-rolled parts by rolling
