Research on the properties of P92 heat-resistant seamless steel pipe produced by hot rolling
P92 seamless steel pipe Manufacturing Process:
The P92 hot-rolled seamless steel pipe is manufactured using hot rolling processing, comprehensive rolling and thermal expansion technology. A steel ingot is heated to a certain temperature and then passed through a breakdown mill, where the billet is rolled into a tube. The heated billet is then pushed through a pierced roller to be extruded and shaped into a steel pipe. Depending on the end-use and design specs, various detail processes may be employed such as cold-drawing and straightening, honing and polishing, pickling and passivation, etc.
P92 seamless steel pipe Chemical Composition
P92 heat-resistant seamless steel pipe has a high alloying content of chromium (Cr: >13%) and molybdenum (Mo: >0.50%). The chemical composition of P92 hot-rolled seamless steel pipe is as follows: carbon (C: 0.07- 0.14%), manganese (Mn: 0.35- 0.60%), silicon (Si: 0.15- 0.35%), phosphorus (P: < 0.035%), sulfur (S: < 0.035%), chromium (Cr: >13%) and molybdenum (Mo: >0.50%).
P92 seamless steel pipe Properties:
P92 heat-resistant seamless steel pipe offers superior strength and creep properties relative to other type of steel pipes. It has excellent heat-resistant and anti-oxidation properties. It is resistant to sulphuric acid, hydrogen sulphide and other corrosive materials, which makes it suitable for applications in the energy, petrochemical and steel industry.
The P92 hot-rolled seamless steel pipe has high tensile strength and yield strength, good formability and weldability, good machinability and high fracture toughness. The thermal expansion coefficient of P92 seamless steel pipe is low, resulting in low thermal stress and reduced risk of cracking. Furthermore, it has excellent resistance to thermal fatigue, making it ideal for repeated high temperature use. Moreover, its high chromium and molybdenum content provides enhanced corrosion resistance and improved thermal stability.
P92 hot-rolled seamless steel pipe Applications:
P92 hot-rolled seamless steel pipe is suitable for a variety of applications such as power plants, boilers, petrochemical and steel industry. The superior mechanical properties make it ideal for use in components subject to high temperatures, such as exhaust systems, superheaters and reheaters, steam pipes and headers, turbine powerhouses and pipes in diesel engines. Additionally, due to its excellent thermal resistance and corrosion resistance properties, P92 seamless steel pipe is commonly used in chemical process piping, in petrochemical plants, and in process piping in stationary power plants.
In conclusion, P92 heat-resistant seamless steel pipe is a type of alloy steel pipe manufactured using hot rolling processing. It has superior strength and creep properties and offers excellent heat resistance, oxidization resistance and corrosion resistance. The low thermal expansion coefficient makes it suitable for high temperature applications. Its high chromium and molybdenum content gives it superior anti-corrosive properties. It is commonly used in power plants, petrochemical plants and other industrial environments.
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