Wuxi Nickel Alloy New Material Technology Co., Ltd
Wuxi Nickel Alloy New Material Technology Co., Ltd
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High-Temperature Performance of Nimonic 90 Rod in Aerospace Applications
Nimonic 90 rod is a high-performance nickel-chromium-cobalt alloy, specifically engineered for applications requiring exceptional strength and resistance to high-temperature oxidation and corrosion. Its unique composition and heat treatment capabilities make it ideal for demanding environments in various industries.
Nimonic 90 rod is a precipitation-hardenable alloy that maintains high strength up to approximately 950°C (1740°F) and offers excellent resistance to creep and oxidation at elevated temperatures. This alloy is widely used in applications such as turbine blades, discs, forgings, ring sections, and hot-working tools.
The chemical composition of Nimonic 90 rod is as follows:
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | balance | |
| Chromium (Cr) | 18.0 | 21.0 |
| Cobalt (Co) | 15.0 | 21.0 |
| Titanium (Ti) | 2.0 | 3.0 |
| Aluminum (Al) | 1.0 | 2.0 |
| Carbon (C) | 0.13 | |
| Silicon (Si) | 1.0 | |
| Manganese (Mn) | 1.0 | |
| Iron (Fe) | 1.5 | |
| Sulfur (S) | 0.015 | |
| Copper (Cu) | 0.2 | |
| Boron (B) | 0.02 | |
| Zirconium (Zr) | 0.15 | |
| Lead (Pb) | 0.002 |
The mechanical properties of Nimonic 90 rod, depending on heat treatment, are:
| Condition | Tensile Strength (MPa) |
|---|---|
| Annealed | 800–1000 |
| Annealed + Aged | 1200–1400 |
| Spring Temper | 1200–1500 |
| Spring Temper + Aged | 1500–1800 |
The physical properties of Nimonic 90 rod are:
| Property | Value |
|---|---|
| Density (g/cm³) | 8.18 |
| Melting Point (°C) | 1370 |
| Coefficient of Thermal Expansion (20–100°C) (µm/m·°C) | 12.7 |
| Modulus of Elasticity (GPa) | 220 |
| Thermal Conductivity (W/m·°C) | 11.47 |
Recommended heat treatments for Nimonic 90 rod are:
| Form | Solution Treatment (°C) | Aging Treatment (°C) | Time (hours) | Cooling |
|---|---|---|---|---|
| Forged Bar/Plate | 1080 | 700 | 16 | Air |
| Hot-Rolled Bar | 1080 | 700 | 16 | Air |
| Cold-Rolled Bar | 1080 | 700 | 16 | Air |
Nimonic 90 rod is utilized in various high-temperature applications, including:
Aerospace: Components such as turbine blades, discs, and high-temperature fasteners.
Power Generation: Turbine blades and high-temperature bolts.
Oil & Gas: Wellhead components and valve stems.
Automotive: Exhaust valves and turbocharger rotors.
Q: What is the maximum operating temperature for Nimonic 90 rod?
A: Nimonic 90 rod maintains its mechanical properties up to approximately 950°C (1740°F), making it suitable for high-temperature applications.
Q: How does Nimonic 90 rod perform in corrosive environments?
A: With its high chromium content, Nimonic 90 rod offers excellent resistance to high-temperature corrosion and oxidation, ensuring durability in aggressive environments.
Q: Can Nimonic 90 rod be welded?
A: Yes, Nimonic 90 rod can be welded using various methods, including shielded metal-arc welding, gas-tungsten arc welding, gas metal-arc welding, and submerged-arc welding. Post-weld heat treatment is recommended to restore mechanical properties.