ASTM A335 Grade P9 Alloy Steel Seamless Tube For High Temperature Service
ASTM A335 Grade P9 Alloy Steel Seamless Tube , For High-Temperature Service
ASTM A335 Grade P9 Alloy Steel Seamless Tube is a high-quality alloy steel pipe designed for high-temperature applications. It is part of the ASTM A335 standard, which specifies seamless ferritic alloy-steel pipes intended for high-temperature service. Grade P9, specifically, is an alloy containing chromium and molybdenum, which provide excellent strength, oxidation resistance, and thermal stability.
Key Features:
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Material Composition:
- Chromium (Cr): Enhances oxidation and corrosion resistance.
- Molybdenum (Mo): Improves strength and temperature resistance.
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Properties:
- High-temperature strength and durability.
- Good resistance to oxidation, corrosion, and creep.
- Excellent weldability and machinability.
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Applications:
- Commonly used in power plants, refineries, and petrochemical industries.
- Ideal for high-pressure and high-temperature environments, such as boilers, heat exchangers, and superheaters.
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Standards and Specifications:
- Standard: ASTM A335
- Grade: P9
- Type: Seamless
- Dimensions: Available in various sizes and thicknesses as per customer requirements.
- Heat Treatment: Normalizing and tempering or other specified treatments for enhanced performance.
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Mechanical Properties:
- Tensile Strength: Minimum 415 MPa (60,200 psi).
- Yield Strength: Minimum 205 MPa (29,700 psi).
- Elongation: Varies depending on pipe dimensions but ensures flexibility under stress.
Chemical composition of Astm A335 Grade P9
| C, % | Mn, % | P, % | S, % | Si, % | Cr, % | Mo, % |
| 0.015 max | 0.30-0.60 | 0.025 max | 0.025 max | 0.50 max | 4.00-6.00 | 0.45-0.65 |
Mechanical properties of Astm A335 Grade P9
| Tensile Strength, MPa | Yield Strength, MPa | Elongation, % |
| 415 min | 205 min |
30 min |
Equivalent of Astm A335 Grade P9
| ASTM | ASME | JIS G 3458 | UNS | BS | ISO |
|---|---|---|---|---|---|
| A335 P9 | SA335 P9 | STPA 26 | S50400 | 3604 P1 629-470 | 2604 II TS38 |
Advantages:
- High performance in extreme temperature and pressure conditions.
- Long service life due to superior material properties.
- Complies with industry standards for reliability and safety.
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