Structural Alloy Steel Bar Grade:13XX, 51XX,41XX series by ASTM, 20Mn5, 28Mn6, 30Mn5 series by DIN, 150M19, 150M28,185H40 serie Structural Alloy Steel BarWe ... ,ASTM A29,A108,A321,A575,BS970,DIN1652,JIS G40512.Grade:By ASTM:1320,1321,1330,1524,1330,1536,1335,1340,1345 ...