Quality: DIN: ST37-2, C22E, C25E, C35E, C45E, S255N JIS: SS400, S20C, S25C, S35C, S45C, YAW-TEN50 ASTM: 1020, 1025, 1035, 1 round steel(1)Size: Diameter: 3mm-500mm(2)Standard: DIN, JIS, ASTM, ISO(3)Quality: DIN: ST37-2, C22E, C25E, C35E, C45E, S255NJIS: SS400, S20C, S25C, S35C, S45C, YAW-TEN50ASTM: 1020, 1025, 1035, 1045, 1050, 1053, Gr-e