Sintered W-Co cemented carbide pellets;  Used as the material for built-up welding. The hardness, wear resistance and corrosion resistance of the surface of the machined parts can be substantially improved;  Particle size: ranged from 250 microns to 2.4mm(American standard). Grade & Chemical Compositions Chemical Compositions(%) Co T.Cd F.Cd Od Tid Fed YQ3 6.5^7.2 5.4 0.1 1.0 0.5 0.5 YQ4 3.5^4.0 5.5 0.1 1.0 0.5 0.5 Microstructure & Physical Properties Physical properties Alloy microstructure Density (g/cm3) Hardness (HV) (Load 100g) Porosityd Uncombined Carbond Microstructured YQ3 14.5^15.0 e1300 A04 B04 C04 Without decarburization, without Co aggregation. YQ4 14.9^15.35 e1400 A04 B04 C04