Car Brake disc /rotor  OE NO:21011106Vehicle  type:SATURN Amico NO.5582vented styler.raw material :HT250 ,Website:://.86baiwang.com,grey iron.detailed features 1. Chemical  specification ItemstandardsBrake discC3.1--3.43.3Si1.9--2.31.95Mn0.6--0.90.75P0.15 MAX0.1S0.12MAX0.08 Electricity stove for iron casting workshop. 2.casting semi-brake discs.2. Physical propertitiesItem standardsBrake discTensile strength 245 N/m㎡ MIN268Hardness HB187--241 HB230microstructureA 85% MIN B5%MAXA 92% MIN B 4%MAXDynamic balance Disc260 g-cm  MAX200 g-cmDynamic balance Drum1300 g-cm MAX500 g-cm3.CNC machining workshop. 3. marked on the brake rotors:4.Dynamic balance testing equipment to test the brake discs' dynamic balance one by one. -Professional Manufacture -Long Service Life