... .8mm-150mmGrade: G10-G1000Hardness: AISI304 and AISI316 are soft materials. For AISI420C after heat-treatment, the hardness is between HRC54-60 ... edges. It is being used in rolling element bearings, valve seats, casters, ball bearings and valve parts.420C is a martensitic stainless steel ... ,G40,G25,G18,G16,G14,G12,G10Any further Information,Plz contact us! 8mm High Quality Stainless steel ...