... steel 20MnTiB 2.Property Class:8. Standard:GB/T 1228-1231,ISO7412,DIN6914-6916,ASME B 18.2.6 (ASTMA325,A490), JISB1186 ... .8,10.9,12.Bolts and nuts:Mechanical Properties1, Material: 40 Cr.2, Tensile strength: Mpa quartile 1220 (magnitude 12.9) .3 ... , Min:1040Mpa.Yield strengthMin:940MpaGrade8.8 or 10.9StandardDIN, ANSI, ASME, ASTM, IFI, JIS, ASThreadMetric, UNC, UNF, BSWFinishPlain, Galvanized, Black, ...