UNS N06002 W.Nr. 2.4665 Nimonic 81 Rods High Temperature Alloy Creep Resistance
Nimonic 81 Rod: Engineered for Extreme Environments
Nimonic 81 rod is a high-performance nickel-chromium alloy designed for demanding applications requiring exceptional strength and corrosion resistance at elevated temperatures. With its precise composition and tailored heat treatments, Nimonic 81 rod offers reliable performance in challenging environments.
Product Overview: Nimonic 81 Rod
Nimonic 81 rod is a precipitation-hardenable nickel-chromium alloy strengthened by controlled additions of titanium and aluminum. This alloy exhibits excellent high-temperature strength and corrosion resistance, making it suitable for components exposed to aggressive environments. Its high chromium content enhances resistance to hot corrosion, while the precipitation-hardening elements contribute to its mechanical robustness.
Chemical Composition
| Element | Composition (% max unless stated) |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | 30.0 |
| Titanium (Ti) | 1.8 |
| Aluminum (Al) | 0.9 |
| Cobalt (Co) | 2.0 |
| Iron (Fe) | 1.0 |
| Molybdenum (Mo) | 0.30 |
| Copper (Cu) | 0.20 |
| Manganese (Mn) | 0.50 |
| Silicon (Si) | 0.50 |
| Carbon (C) | 0.05 |
| Sulfur (S) | 0.015 |
| Boron (B) | 0.003 |
| Zirconium (Zr) | 0.06 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Room Temp) | 1050 MPa |
| Yield Strength (0.2% offset) | 600 MPa |
| Elongation at Break | 40% |
| Hardness (Brinell) | 233 HBW |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.06 g/cm³ |
| Melting Range | 1305–1375°C |
| Thermal Conductivity | 10.9 W/m·K |
| Coefficient of Thermal Expansion (20–100°C) | 11.1 µm/m·°C |
| Specific Heat Capacity | 0.461 J/g·°C |
Heat Treatment Recommendations
| Form | Solution Treatment | Aging Treatment |
|---|---|---|
| Extruded/Forged Bar | 8h at 1100°C, AC or WQ | 16h at 700°C, AC |
| Hot-Rolled Plate/Sheet | 0.5h at 1100°C, AC or WQ | 16h at 700°C, AC |
| Cold-Rolled Sheet | 5–15 min at 1100°C, FBQ or WQ | 16h at 700°C, AC |
AC: Air Cooling, WQ: Water Quenching, FBQ: Fluidized Bed Quenching
Applications
Nimonic 81 rod is utilized in various high-temperature applications, including:
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Gas turbine components
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Piston engine exhaust valves
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Heat exchangers
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Chemical processing equipment
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Power generation systems
Frequently Asked Questions
Q: What standards apply to Nimonic 81 rod?
A: Nimonic 81 rod conforms to relevant ASTM standards for high-temperature nickel alloys.
Q: Can Nimonic 81 rod be welded?
A: Yes, welding should be performed in the solution-treated condition, followed by appropriate post-weld heat treatment.
Q: Is Nimonic 81 rod suitable for corrosive environments?
A: Yes, its high chromium content provides excellent resistance to hot corrosion, making it ideal for aggressive environments.
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