Alloy tubes are divided into structural seamless tubes and high-pressure heat-resistant alloy tubes. Mainly different from the production standard of alloy pipe and its industry, annealing and tempering of alloy pipe changes its mechanical properties and achieves the required processing conditions. Its performance is higher than that of ordinary seamless steel pipes, and its chemical composition contains more Cr, and it has high temperature resistance, low temperature resistance and corrosion resistance. There are no alloy components or very few alloy components in ordinary carbon seamless pipes. The mechanical properties of alloy pipes are varied and easy to adjust, so they are widely used in petroleum, aerospace, chemical, electric power, boiler, military and other industries.
The use and classification of alloy pipes
Alloy steel pipes are mainly used for high-pressure and high-temperature pipelines and equipment such as power plants, nuclear power, high-pressure boilers, high-temperature superheaters and reheaters.It is made of high-quality carbon steel, alloy structural steel and stainless heat-resistant steel, and is made by hot rolling (extrusion, expansion) or cold rolling (drawing). Alloy pipes include large-diameter alloy pipes, thick-walled alloy pipes, high-pressure alloy pipes, alloy flanges, alloy elbows, P91 alloy pipes and seamless steel pipes. In addition, special pipes for fertilizers are also very common.
Advantages of Alloy Tubes
1. The alloy tube has higher hardenability. Compared with the ordinary seamless tube, the depth of the hardened layer of the alloy tube is better. The workpiece is deformed and the cracking tendency is lower.
2. The strength and yield of the alloy are higher.
3. Good cold and hot pressure processing performance. Due to its good plasticity and low deformation resistance, it is not easy to produce cracks after pressure processing.
4. It can meet the requirements of special performance,It is often better in terms of oxidation resistance, corrosion resistance, heat resistance, low temperature resistance, wear resistance and special electromagnetic properties, which can meet the needs of special performance.
5. It has precise geometric dimensions, uniform lateral wall thickness, good steel pipe shape, small barrel roundness, reliable quality, small internal burrs, and smooth external surface.After heat treatment or protective atmosphere heat treatment, the steel pipe can achieve the effect of no oxygen on the surface, stable mechanical properties and uniform metallographic structure.Its production cost is much lower than that of similar seamless precision steel pipes, and it can be used in some equipment directly or after a small amount of processing, reducing equipment processing costs.
6. Using alloy steel pipe to make ring parts can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing time, such as rolling bearing rings, jack sets, etc.