1harden and temper steel strip 2gradeCk67,C75Cr1,60Si2Mn 3size0.7-1.7mmx25-70mm 4edge ,both rounded 5hardness45-49Hrc hardened and tempered steel strip1. grade ck67,C75Cr1,60Si2Mn3. treatment : hardened and tempered4. thickness from 0.7mm to 1.7mm,5. width 25-70mm6, tolerance of thickness:+/-0.01mm, width :+/-0.1mm.7. good flatness, edge with both rounded8. surface: polish blue , yellow ,navy ...