1. Key Properties:
Chromium-Molybdenum Alloy Steel: C22/ASTM A335 P22 is a chromium-molybdenum steel alloy, known for its excellent high-temperature strength and resistance to oxidation and corrosion.
High-Temperature Strength: The alloy maintains its mechanical properties at elevated temperatures, making it ideal for use in high-temperature environments such as power plants and chemical industries.
Creep and Fatigue Resistance: P22 offers superior creep resistance and fatigue strength, ensuring durability in applications exposed to prolonged stress and high temperatures.
Weldability: The material has good weldability but may require preheating and post-weld heat treatment to prevent cracking and ensure long-term performance.
Corrosion Resistance: P22 provides strong resistance to oxidation and corrosion, especially in steam and other aggressive environments, ensuring the longevity of components in harsh industrial conditions.
2. Applications/Industries:
Power Generation: C22/ASTM A335 P22 is widely used in power plants, especially for manufacturing boiler tubes, superheaters, reheaters, steam pipelines, and other components exposed to high heat and pressure.
Petrochemical: The steel is used for high-temperature applications in petrochemical plants, including heat exchangers, reactors, and pipelines.
Oil & Gas: P22 is ideal for piping systems and pressure vessels in the oil and gas industry that require high strength and resistance to high temperatures.
Chemical Processing: It is used in chemical processing equipment, including reactors and heat exchangers, that need to withstand thermal stresses, oxidation, and corrosive environments.
Heavy Machinery: C22/ASTM A335 P22 is used in heavy machinery for parts that experience high heat and mechanical stress, ensuring reliability in demanding operating conditions.
3. Certifications/Standards:
ASTM A335: C22/ASTM A335 P22 is produced according to ASTM A335, a standard for seamless ferritic alloy-steel pipes intended for high-temperature service, ensuring compliance with the necessary mechanical and chemical properties.
ISO 9001: The material is manufactured in accordance with ISO 9001 standards, ensuring reliable quality management processes and consistent product quality.
4. Chemical Composition:
Carbon (C): 0.10% – 0.15%
Manganese (Mn): 0.30% – 0.60%
Chromium (Cr): 1.90% – 2.60%
Molybdenum (Mo): 0.90% – 1.10%
Silicon (Si): 0.50% max
Phosphorus (P): 0.025% max
Sulfur (S): 0.010% max
Iron (Fe): Balance
5. Technical Specifications:
Yield Strength:
C22/ASTM A335 P22: 205 MPa (minimum)
Tensile Strength:
C22/ASTM A335 P22: 415 MPa (minimum)
Hardness:
C22/ASTM A335 P22: Typically ranges between 170–210 HB (Brinell hardness), depending on heat treatment.