1.Hot rolled round steel bar 2.Dia 18-360mm 1. GB-20CrMo. DIN-25CrMo4. JISG-SCM420. ISO--18CrMo4.2. Hot rolled round steel bar3. Dia 18-360mm4. Good Quality, can be after the Q/T heat-treatment5. Can be ensured with Ultra-sonic defeat detector, 25CrMo4/20CrMo4/SCM 420 Round steel bar