round bar Standard: GB/T 3077-1999 Grade: 20CrMnTi30CrMnTi20Cr40Cr20CrMo35CrMo42CrMo Size: 20-10 round bar Application:-machinery accessory,-shaft, hardware,gear,-standard parts peg,-bolt, bicycle, -autobike, etc. Specification:Standard: GB/T 3077-1999Size: 20-100mm