Alloy Steel Grade F22 is a 2.25% chromium, 1% molybdenum alloy steel engineered for high-temperature and high-pressure service. It offers excellent creep resistance, good toughness, and strong resistance to hydrogen damage. Grade F22 is extensively used in power plants, refineries, and petrochemical units for components such as headers, piping, valves, and pressure vessels exposed to severe operating conditions.
MECHANICAL PROPERTIES OF ALLOY STEEL F22 ROUND BAR
Grade
Tensile Strength (MPa) min
0.2% Yield Strength (MPa) min
Elongation (% in 50mm) min
Rockwell B (HRB) max
Brinell (HB) max
F22
415
205
20
—
170 max
💡 Practical Difference in Use
Use Alloy Steel Grade F22 Round Bars when: high-temperature strength, excellent creep resistance, and resistance to hydrogen attack are required. Alloy Steel F22 is a 2.25% chromium–1% molybdenum alloy steel designed for severe pressure and temperature service in power and petrochemical industries.
→ Example: high-pressure steam piping, boiler headers, pressure vessels, refinery reactors, and heat exchangers.
Bright Finished / Machined Alloy Steel F22 Round Bars when: tight dimensional tolerances, smooth surface finish, and precision machining are critical for high-pressure components. Bright bars improve machinability and ensure consistent mechanical performance.
→ Example: valve bodies, studs, bolts, flanges, shafts, and precision-machined pressure parts.
Applications of Alloy Steel Grade F22 Round Bars
Alloy Steel F22 round bars are extensively used in high-temperature and high-pressure environments requiring long-term reliability.
Power Generation: Boilers, headers, steam piping.
Oil & Gas & Refineries: High-pressure piping, reactors.
Petrochemical Plants: Heat exchangers and pressure vessels.
When to Choose Alloy Steel Grade F22 Round Bars?
Selection depends on pressure severity, operating temperature, hydrogen resistance requirements, and service life expectations.
Choose Alloy Steel F22 Round Bars when:
High pressure and elevated temperature service is required
Excellent creep and rupture strength is needed
Resistance to hydrogen attack is critical
Components operate under severe thermal and pressure stress
