Alloy pipe is a kind of seamless steel pipe. Alloy pipe is divided into structural seamless pipe and high-pressure heat-resistant alloy pipe. It is mainly different from the production standard and industry of alloy tubes. The mechanical properties of alloy tubes are changed by annealing and tempering. Achieve the required processing conditions. Its properties are higher than those of seamless steel tubes, which contain more Cr in the chemical composition of alloy tubes and have high temperature, low temperature and corrosion resistance. There is no alloy or very little alloy in seamless carbon pipe. The reason why alloy pipe is widely used in petroleum, aerospace, chemical industry, electric power, boiler, military industry and other industries is that the mechanical properties of alloy pipe are well adjusted due to the variety of mechanical properties.