Boron carbide is smelted from boric acid and powdered carbon in electric furnace under high temperature. depending on hardness of 4950kgf/mm2, it is even harder than diamond and cubic boron nitride. because of their high strength, low density, corrosion resistant, high temperature resistant, low thermal conductivity, high modulus of elasticity ... Polishing boron carbide/ boron carbide powder price , find complete details about polishing boron carbide/ boron carbide powder price,hot sale grinding for stone cleaning black silicon carbide from abrasives supplier or manufacturer-jinan fuyuan grinding materials co., ltd. High quality boron carbide powder for hot sale , find complete details about high quality boron carbide powder for hot sale,high quality boron carbide,hot selling boron carbide powder,factory price boron carbide powder from supplier or manufacturer-henan ruiheng new material co., limited Note: we can supply different size products of boron carbide nano powder according to client's requirements. boron carbide powder is one of the most hardness materials in the world. its mohs hardness is 9.3. b4c is with the properties of low density, high strength, high temperature stability and chemical stability characteristics.