ASTM A369 FP5 (UNS K41545) Ferritic Alloy Steel Pipe
ASTM A369 FP5 (UNS K41545) Ferritic Alloy Steel Pipe is a high-temperature grade designed for use in boilers, superheaters, heat exchangers, and high-pressure piping systems. Manufactured using a forged and bored process, FP5 pipes provide remarkable strength, excellent high-temperature resistance, and superior dimensional accuracy. With enhanced chromium and molybdenum content, FP5 offers improved oxidation resistance, creep strength, and long-term reliability for critical industrial applications.
Key Features
- High-temperature alloy steel for elevated service conditions
- Forged & Bored manufacturing ensures exceptional strength
- Excellent creep resistance and thermal stability
- Superior oxidation and corrosion resistance in hot environments
- Ideal for high-pressure and high-temperature service equipment
- Available in large OD and heavy-wall custom dimensions
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | A369 FP5 |
| ASME | SA369 FP5 |
| UNS | — |
| EN / DIN | — |
Available Sizes
- Outer Diameter: 2” to 24”
- Wall Thickness: SCH 20 to SCH XXS
- Custom heavy-wall & large diameter pipes available
ASTM A369 FP5 Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.15 max |
| Manganese (Mn) | 0.30 – 0.60 |
| Phosphorus (P) | 0.025 max |
| Sulfur (S) | 0.025 max |
| Silicon (Si) | 0.50 max |
| Chromium (Cr) | 4.00 – 6.00 |
| Molybdenum (Mo) | 0.45 – 0.65 |
Grade FP5 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 415 MPa (min) |
| Yield Strength | 205 MPa (min) |
| Elongation | 30% (min) |
| Hardness | — |
Grade FP5 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | ~1420–1450°C |
| Thermal Conductivity | 42–50 W/m·K |
| Modulus of Elasticity | 200 GPa |
Type of ASTM A369 FP5 Pipes
- Forged & Bored Alloy Steel Pipe
- Seamless Heavy-Wall Pipe
- High-Temperature Pressure Pipe
- Custom Machined Thick-Wall Pipe
Applications
- Boilers
- Superheaters
- Heat Exchangers
- High-Pressure Steam Lines
- Refinery & Petrochemical Piping
- Power Generation Units
- Chemical Processing Plants
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