1. Key Properties:
Chromium-Molybdenum-Vanadium Alloy Steel: A335 P92 is a high-performance alloy steel that is specifically designed for high-temperature and high-pressure applications. It contains chromium, molybdenum, and vanadium, which enhance its strength, toughness, and resistance to thermal degradation.
High-Temperature Strength: A335 P92 maintains its strength and integrity at elevated temperatures, making it ideal for use in steam, gas, and hot fluid environments, where materials are exposed to high heat.
Creep Resistance: This material is known for its excellent resistance to creep deformation at high temperatures, which is essential in power plants and similar applications where long-term mechanical stress is applied.
Good Weldability: A335 P92 is weldable under controlled conditions, though preheating and post-weld heat treatment may be required to avoid the formation of brittle structures.
Corrosion Resistance: A335 P92 offers good corrosion resistance in high-temperature applications, but additional coatings or treatments may be needed in particularly aggressive environments.
Fatigue and Thermal Cycling Resistance: The alloy’s composition allows it to resist thermal cycling and fatigue in environments subject to frequent temperature fluctuations.
2. Applications/Industries:
Power Generation: A335 P92 is widely used in the power generation industry for components such as boiler tubes, superheaters, reheaters, and steam pipelines, where resistance to high temperature, pressure, and creep is required.
Petrochemical: This steel is used in the petrochemical industry for pipelines and pressure vessels that operate in high-temperature environments.
Oil & Gas: It is used for critical piping and equipment in the oil and gas industry, including those subjected to high pressures and elevated temperatures.
Chemical Processing: A335 P92 is used for reactors, heat exchangers, and other high-temperature equipment in the chemical processing industry.
Heavy Machinery: In some heavy machinery applications, particularly those involving high-stress and temperature conditions, A335 P92 is used for structural components that need to withstand thermal expansion and long-term wear.
3. Certifications/Standards:
ASTM A335: A335 P92 is covered by the ASTM A335 standard, which specifies seamless ferritic alloy-steel pipes for high-temperature service. This standard ensures that the pipe meets the necessary mechanical and chemical properties for use in elevated temperature applications.
ISO 9001: The material is manufactured according to ISO 9001 standards for quality management, ensuring consistent product quality and reliability in industrial applications.
4. Chemical Composition:
Carbon (C): 0.05% – 0.12%
Manganese (Mn): 0.30% – 0.60%
Chromium (Cr): 8.50% – 9.50%
Molybdenum (Mo): 0.85% – 1.05%
Vanadium (V): 0.18% – 0.25%
Silicon (Si): 0.30% max
Phosphorus (P): 0.020% max
Sulfur (S): 0.010% max
Nickel (Ni): 0.30% max
Iron (Fe): Balance
5. Technical Specifications:
Yield Strength:
A335 P92: 415–585 MPa (depending on heat treatment and thickness)
Tensile Strength:
A335 P92: 585–725 MPa
Hardness:
A335 P92: Typically ranges from 170–220 HB (Brinell hardness) depending on the heat treatment.