Grade: YG4C Density: 15.00 ~ 15.20 Hardness: 90.0 Flexural strength: 1900 Use: suitable for geological exploration, coal mining, inlay system and a pneumatic drill drill drill, drilling coal face without silicified shale, potash, rock salt and other are rocks. Also suitable for medium hard sandstone, limestone, and alternating hard and soft rock. A refractory metal carbide hard metal compound and a binder made of a process by powder metallurgy alloys. Carbide with high hardness, wear resistance, strength and toughness, heat resistance, corrosion resistance and a series of excellent performance, especially its high hardness and wear resistance, even at 500 ℃ temperature also remained unchanged , at 1000 ℃ still very high hardness.