ASTM A369 FP2 Ferritic Alloy Steel Pipe (UNS K11547)
ASTM A369 FP2 Ferritic Alloy Steel Pipe (UNS K11547) is a high-temperature grade specifically engineered for boilers, superheaters, heat exchangers, and high-pressure piping systems. Manufactured through a forged and bored process, FP2 delivers superior mechanical strength, uniform wall thickness, and enhanced reliability in elevated-temperature conditions. Its balanced alloy composition provides excellent creep resistance, improved thermal stability, and reliable weldability, making it ideal for heavy-duty industrial service environments.
Key Features
- High-temperature ferritic alloy steel (UNS K11547)
- Superior strength due to forged & bored manufacturing
- Excellent creep resistance at elevated temperatures
- Strong weldability and dimensional accuracy
- Ideal for boilers, superheaters, and pressure piping
- Available in large diameters and heavy-wall configurations
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | A369 FP2 |
| ASME | SA369 FP2 |
| UNS | K11547 |
| EN | — |
| DIN | — |
Available Sizes
- Outer Diameter: 2” to 24”
- Wall Thickness: SCH 20 to SCH XXS
- Custom heavy wall & non-standard sizes available
ASTM A369 FP2 Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.15 – 0.30 |
| Manganese (Mn) | 0.30 – 0.60 |
| Silicon (Si) | 0.10 – 0.50 |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.035 max |
Grade FP2 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 415 MPa (min) |
| Yield Strength | 220 MPa (min) |
| Elongation | 30% (min) |
| Hardness | — |
Grade FP2 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | ~1425–1540°C |
| Thermal Conductivity | 48 W/m·K |
| Modulus of Elasticity | 200 GPa |
Types of Grade FP2 Pipes
- Forged & Bored Alloy Steel Pipe
- Seamless Pressure Pipe
- Heavy Wall Ferritic Alloy Pipe
- Custom Machined Pipe for High-Temp Service
Applications
- Boilers
- Superheaters
- Heat Exchangers
- Power Generation Systems
- Petroleum Refining Units
- Chemical & Petrochemical Plants
- High-Pressure Steam Lines
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