ASTM A283/A283M Standard Specification for Low and Intermediate Tensile Strength Carbon Steel Plates,ASTM A283/A283M standard specification covers four grades of carbon steel plates of structural quality for general application. Steel samples shall be melt processed by either open-hearth, basic-oxygen, or electric furnace.ASTM A283/A283M Standard main steel grade:ASTM A283Grade A,B,C,D(A283GRA,A283GRB,A283GRC,A283GRD)