Steel Grade: 60#, 65#, 65Mn, 70#, 72A, 72B, 80#, 82A, 82B Diameter: 0.20mm~12.00mm Standard: DIN17223-1 Spring ... requirements.Steel Grade: 60#, 65#, 65Mn, 70#, 72A, 72B, 80#, 82A, 82BDiameter: 0.20mm~10.00mmProduction Standard: DIN17223, GB 4357-89Chemical ... .810.22-0.240.59-0.760.0080.0040.004 82A, 82B0.820.24-0.250.76-0.770.011-0 ...