Alloy tube (Alloy pipe) is a kind of seamless steel pipe, alloy pipe into the structure seamless pipe and high pressure heat-resistant alloy tube. The main difference between alloy pipe production standard and its industrial, quenched and annealed alloy tube to change its mechanical properties. Achieve the desired processing conditions. Its performance is changing the use of higher value than the average of seamless steel containing Cr alloy tube chemical composition more, high temperature, low temperature resistance, corrosion-resistant performance. Carbon seamless pipe without alloy composition or alloy composition little more extensive use of alloy pipe in the petroleum, aerospace, chemical, electric power, boiler, military and other industries because of the many changes of the mechanical properties of the alloy tube adjustment.