ASTM A283 Standard Specification for Low and Intermediate Tensile Strength Carbon Steel Plates,ASTM A283 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 standard main steel grade:ASTM A283Grade A,B,C,D(A283GRA,A283GRB,A283GRC,A283GRD).