Fighter among high temperature alloys!
Fighter among high temperature alloys! Detailed explanation of N07001 material properties, heat treatment and application scenarios
N07001 is a nickel-based high temperature alloy with excellent high temperature strength, creep resistance and oxidation resistance. It is mainly used in high temperature and high stress environments such as aerospace, gas turbines, jet engines and nuclear industry.
1. Basic information
| Item | Specification |
|---|---|
| Name | Waspaloy (Trade Name) |
| Type | Nickel-based precipitation-strengthened superalloy |
| UNS Number | N07001 |
| Standards | AMS 5706, AMS 5708, ASTM B637 |
| Key Characteristics | High-temperature strength, Creep resistance, Oxidation resistance, Precipitation-strengthened type |
2. Chemical composition (Typical %)
| Element | Composition Range |
|---|---|
| Ni (Nickel) | Balance (≈58%) |
| Cr (Chromium) | 18 - 21% |
| Co (Cobalt) | 12 - 15% |
| Mo (Molybdenum) | 3.5 - 5% |
| Al (Aluminum) | 1.2 - 1.6% |
| Ti (Titanium) | 2.75 - 3.25% |
| Fe (Iron) | ≤ 2.0% |
| C (Carbon) | 0.02 - 0.10% |
| B (Boron) | 0.003 - 0.01% |
| Zr (Zirconium) | 0.02 - 0.06% |
Strengthening mechanism: Mainly relying on γ′ (Ni₃(Al,Ti)) precipitation phase to strengthen the structure
3. Material properties
| Performance Metric | Description |
|---|---|
| High-Temperature Strength | Exceptional tensile/creep resistance up to 980°C |
| Oxidation Resistance | Protective oxidation resistance in air up to 1100°C |
| Creep Resistance | Maintains strength during long-term service at 700–870°C |
| Thermal Stability | Microstructural stability with minimal grain coarsening for prolonged high-temperature service |
| Corrosion Resistance | Resistance to hot corrosion in salt, combustion gases, and other aggressive high-temperature environments |
4. Typical mechanical properties (after aging treatment)
| Property | Value (Ambient Temperature) |
|---|---|
| Tensile Strength (MPa) | ≥ 1275 MPa |
| Yield Strength (MPa) | ≥ 980 MPa |
| Elongation (%) | ≥ 15% |
| Hardness | HRC 38 - 44 |
| Service Temperature | Continuous: 650–870°C Short-term exposure: >980°C |
5.Heat treatment process
N07001 improves strength through solution treatment + two-stage aging treatment:
Standard heat treatment process:
Solution treatment:
1080–1120°C × 2 hours, air cooling or rapid cooling
Aging treatment (two-stage):
First stage: 845°C × 4 hours, air cooling
Second stage: 760°C × 16 hours, air cooling
Aging treatment is the key process for strengthening N07001, which improves high-temperature performance by precipitating γ′ phase.
6. Main application areas
| Industry | Key Applications |
|---|---|
| Aerospace | Jet engine turbine discs, blades, combustors, turbine casings |
| Gas Turbines | High-pressure turbine components, turbine rings, burner assemblies |
| Nuclear Industry | High-temperature bolts, fasteners, structural support systems |
| Oil & Gas | High-temperature valves, corrosion-resistant connectors, downhole tool assemblies |
7. N07001 vs. other high temperature alloys
| Material | High-Temp Strength | Machinability Rating | Service Temp Range | Weldability | Key Characteristics |
|---|---|---|---|---|---|
| N07001 (Waspaloy) |
⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ (Difficult) |
650–980°C | Poor (requires preheat) |
Ideal for heavy-load components in extreme heat |
| Inconel 718 | ⭐⭐⭐⭐ | ⭐⭐⭐ | 650–720°C | Good | Well-balanced properties, cost-effective |
| Rene 41 | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | 700–980°C | Moderate | Similar to Waspaloy, marginally lower creep strength |
| Nimonic 90 | ⭐⭐⭐⭐ | ⭐⭐⭐ | 600–850°C | Fair | Optimal for moderate high-temperature oxidation resistance |
Waspaloy is superior to Inconel 718 in that its high temperature strength (especially 870~980°C) is stronger and more stable, but its machinability is worse and its weldability is not as good as 718.
8. Overview
Pros and Cons Table
|
Pros |
Cons |
|---|---|
|
Excellent high-temperature strength (turbo level) |
High processing difficulty, high tool wear |
|
Creep resistance and oxidation resistance |
Poor weldability, high requirements for welding process |
|
Suitable for extremely high-temperature and high-load components |
High material price |
N07001 is a high-strength alloy designed for high-temperature extreme conditions, especially suitable for high-temperature load components in aircraft engines and gas turbines. It can still maintain excellent structural stability and strength at 700~980°C.
