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ASTM A335 P9 Seamless Alloy Steel Tube For Fired Heater
ASTM A335 P9 is a specification for seamless ferritic alloy-steel pipes intended for high-temperature service. The P9 designation indicates a specific grade within this specification, known for its strength and ability to withstand extreme conditions.
ASTM A335 P9 Seamless Alloy Steel Tube is a high-performance material designed for challenging applications involving high temperatures and pressures. Its robust chemical composition and mechanical properties make it suitable for power generation, petrochemical, oil and gas, and industrial boiler applications. The tube's ability to withstand oxidation and corrosion in extreme environments ensures longevity and efficiency, making it a preferred choice for high-temperature service.
Chemical Composition:
Grade | Cr | Mo | C | Mn | Si | P | S |
A335 P9 | 8.0-10.0% | 0.90-1.10% | 0.15% max | 0.30-0.60% | 0.25-1.00% | 0.025% max | 0.025% max |
Mechanical Properties:
Grade | Yield Strength | Tensile Strength | Elongation | Hardness |
A335 P9 | ≥ 205 MPa (30 ksi) | ≥ 415 MPa (60 ksi) | ≥ 30% in 50 mm | Varies depending on heat treatment |
Key Features:
Applications:
ASTM A335 P9 is extensively used in industries where high-temperature and high-pressure conditions are prevalent. Here are some detailed applications:
1. Power Generation
2. Petrochemical Industry
3. Oil and Gas Industry
4. Industrial Boilers