Product introduction: chalcocite is lightgray powder,it is made by selected and crushed chalcocite ore, the main ingredients is cuprous sulfide. The density is 8.3-8.9g/cm3, the hardness is 3 ,the melting point is 1030 centigrade and the boiling point is 2310 centigrade. Chalcocite used for friction materials to adjust the high temperature friction properties and wear resistance, it suitable for disc brake pads and drum brake pads. According to the requirements of the performance,the recommended regular consumption is between 2% and 8%. Property: density: 5.4-5.8g/cm3 copper content:18%-20% moisture:2%max screen analysis: +S 100 0 -S 180 90%max grade:200mesh,325mesh sieving rate: 97%