... :Cu: 58-99%, the rest is Zn supply long life time cooper cut wire shot Main technical indicators of copper ... α+βDensity8.9g/cm3Bulk Density5.1g/cm3 It is widely used in surface treatment such as descaling, burr removing, elimination of ... etching, matte finish, leveling, strengthening and rust prevention before applying in the metal die castings, precision castings, hardware & tools, machinery ...