18Ni15Co6.7Mo2Ti: A High-Performance Alloy for Extreme Conditions
18Ni15Co6.7Mo2Ti is a high-performance alloy known for its excellent strength, toughness, and resistance to high-temperature oxidation and wear. This alloy is typically used in applications that require outstanding mechanical properties and thermal stability, making it ideal for aerospace and other high-stress environments.
Composition
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 18 |
| Cobalt (Co) | 15 |
| Molybdenum (Mo) | 6.7 |
| Titanium (Ti) | 2 |
| Iron (Fe) | Balance |
Key Features
High Strength and Toughness
The alloy’s combination of nickel and cobalt ensures high tensile strength and impact resistance, making it suitable for applications under high mechanical stress.
Excellent High-Temperature Resistance
Molybdenum and titanium enhance the alloy’s ability to resist oxidation and maintain structural integrity at elevated temperatures, making it ideal for high-temperature applications.
Corrosion Resistance
The alloy's resistance to both oxidation and corrosion extends its lifespan in harsh environments, especially in aerospace and industrial applications.
Improved Wear Resistance
The high molybdenum content contributes to excellent wear resistance, making this alloy suitable for components exposed to abrasive conditions.
Typical Applications
Aerospace
Turbine blades, engine components, and other high-stress parts requiring both strength and thermal stability.
High-Temperature Equipment
Furnace components, heat exchangers, and other equipment exposed to elevated temperatures and oxidative conditions.
Marine and Chemical Processing
Parts exposed to corrosive environments, such as pumps, valves, and reactor components.
Power Generation
Components in power plants, including steam turbines and heat exchangers, that operate under extreme conditions.
Specifications
| Property | Value |
|---|---|
| Density | ~8.1–8.3 g/cm³ |
| Tensile Strength | ~1100–1300 MPa |
| Yield Strength | ~900 MPa |
| Elongation | ~10–15% |
| Hardness (HRC) | ~35–40 |
Advantages
| Feature | Details |
|---|---|
| High strength and toughness | Ideal for demanding mechanical applications. |
| Excellent high-temperature resistance | Performs well in extreme thermal environments. |
| Corrosion resistance | Suitable for harsh and corrosive conditions. |
| Wear resistance | Ideal for components exposed to wear and abrasion. |
Limitations
| Constraint | Details |
|---|---|
| Machining difficulty | Due to its hardness, it may require specialized machining processes. |
| Cost | High-performance alloys can be more expensive than standard materials. |
FAQs
What industries use 18Ni15Co6.7Mo2Ti?
Industries such as aerospace, power generation, and marine benefit from the alloy's high strength, wear resistance, and thermal stability.
Can this alloy withstand high-temperature oxidation?
Yes, the addition of molybdenum and titanium provides excellent oxidation resistance, making it suitable for high-temperature applications.
Is this alloy suitable for chemical processing environments?
Yes, its corrosion resistance makes it a good choice for chemical processing applications, especially in reactors and pumps.
Conclusion
18Ni15Co6.7Mo2Ti is a high-performance alloy designed for applications that demand exceptional strength, wear resistance, and high-temperature stability. Its unique combination of nickel, cobalt, molybdenum, and titanium makes it ideal for aerospace, power generation, and marine applications where durability and performance under extreme conditions are critical.