ASTM A369 FP92 Alloy Steel Pipe (UNS K92460)
ASTM A369 FP92 (UNS K92460) is a 9% Chromium – 0.5% Molybdenum – Tungsten – Vanadium – Niobium (9Cr-0.5Mo-1.8W-VNb) enhanced ferritic alloy steel, known for its superior creep strength, excellent oxidation resistance, and exceptional performance in ultra-supercritical temperature environments.
Produced through a forged and bored heavy-wall manufacturing process, FP92 is widely used in power generation, high-pressure steam piping, superheaters, reheaters, and petrochemical high-temperature service. FP92 is considered an upgraded version of FP91, offering higher temperature strength and longer service life.
Key Features
- Advanced 9Cr-0.5Mo-W-VNb alloy – UNS K92460
- Outstanding creep & high-temperature strength
- Superior oxidation, thermal fatigue & corrosion resistance
- Forged & bored heavy-wall pipes for critical pressure applications
- Ideal for supercritical & ultra-supercritical power plants
- Long-term performance in elevated temperature steam environments
Available Sizes
| Parameter | Range |
|---|---|
| Outside Diameter (OD) | 50 mm – 1200 mm |
| Wall Thickness (WT) | 5 mm – 150 mm (Heavy-wall) |
| Inside Diameter (ID) | As per customer requirement |
| Length | Up to 12 meters |
| Special Options | OD up to 1500 mm available |
Equivalent Grades
| Standard | Grade |
|---|---|
| ASTM | A369 FP92 |
| ASME | SA369 FP92 |
| UNS | K92460 |
| EN / DIN | Similar to X10CrWMoVNb9-2 (not exact) |
ASTM A369 FP92 Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.07 – 0.13 |
| Manganese (Mn) | 0.30 – 0.60 |
| Silicon (Si) | 0.20 – 0.50 |
| Phosphorus (P) | 0.020 max |
| Sulfur (S) | 0.010 max |
| Chromium (Cr) | 8.5 – 9.5 |
| Molybdenum (Mo) | 0.30 – 0.60 |
| Tungsten (W) | 1.50 – 2.00 |
| Vanadium (V) | 0.15 – 0.25 |
| Niobium (Nb) | 0.04 – 0.09 |
| Nitrogen (N) | 0.03 – 0.07 |
| Boron (B) | 0.001 – 0.006 |
Grade FP92 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 620 MPa (min) |
| Yield Strength | 440 MPa (min) |
| Elongation | 20% (min) |
| Hardness | 250 HBW (max) |
Grade FP92 Physical Properties
| Property | Value |
|---|---|
| Density | 7.78 g/cm³ |
| Thermal Conductivity | ~26 W/m·K |
| Modulus of Elasticity | ~210 GPa |
| Melting Point | ~1420–1500°C |
Type of Grade FP92 Pipes
- Forged & Bored Alloy Steel Pipe
- Heavy-Wall High-Temperature Piping
- Ultra-Supercritical Boiler Tubing
- Seamless 9Cr-W Alloy Power Plant Pipe
Applications
- Ultra-supercritical & supercritical power plants
- High-pressure steam lines
- Reheaters and superheaters
- Heat exchangers
- HRSG units
- Petrochemical high-temperature systems
- Refinery steam service
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