Vacuum reaction sintered silicon carbide exhibits fundamental properties and main characteristics such as high strength, high hardness, high wear resistance, high-temperature resistance, corrosion resistance, strong oxidation resistance, excellent thermal shock resistance, good thermal conductivity, resistance to rapid cooling and heating, and high-temperature creep resistance. It can be manufactured into square beams, roller tubes, rapid cooling air pipes, thermocouple protection tubes, temperature measurement tubes, burner nozzles, wear-resistant components, corrosion-resistant parts, sealing elements, and various special-shaped structural components.