ASTM A572 Gr.65 Carbon Steel Plates.With the development of science, technology and industry, higher requirements are put forward for materials, such as higher strength, high temperature, high pressure, low temperature, corrosion resistance, wear resistance and other special physical and chemical properties. To meet the requirements, alloy steel plates appeared. Alloy steel sheets are classified as follows: Classification by use: bridge steel plates, boiler steel plate, shipbuilding steel plate, armor steel plates, automobile steel plates, roofing steel plates, structural steel plates, electrical steel plates (silicon steel sheet), spring steel plates, etc. Classification by structure: steel plate for pressure vessels, steel plate for welded gas cylinders, steel sheets for boilers, steel plate for bridge, steel plates for automobile beam, etc. Classification of alloy steel: According to the content of alloying elements: low alloy steel (total alloy elements le…