RENE 220 Centri-Vac Nickel Cobalt Based Alloy，1

### **Product Introduction: RENE 220 Centri-Vac Nickel-Based Superalloy** **Overview** RENE 220 is an advanced precipitation-hardenable nickel-based superalloy developed for extreme temperature applications in aerospace and power generation sectors. Utilizing the proprietary "Centri-Vac" manufacturing process that combines centrifugal casting with vacuum melting, this alloy achieves exceptional metallurgical integrity, superior mechanical properties, and enhanced performance characteristics. The alloy is specifically engineered to withstand the most demanding operating conditions in modern gas turbine engines, offering an optimal combination of high-temperature strength, creep resistance, and environmental stability. --- #### **Chemical Composition (Typical % by Weight)** | Element | Content (%) | Role & Benefit | |---------|-------------|---------------| | **Nickel (Ni)** | Balance | Forms austenitic matrix | | **Cobalt (Co)** | 11.0 - 13.0 | Enhances solid solution strengthening | | **Chromium (Cr)** | 11.0 - 12.5 | Provides oxidation and corrosion resistance | | **Molybdenum (Mo)** | 1.8 - 2.3 | Solid solution strengthener | | **Tungsten (W)** | 4.7 - 5.3 | Enhances high-temperature strength | | **Aluminum (Al)** | 3.2 - 3.7 | Primary γ' phase formation (Ni₃Al) | | **Titanium (Ti)** | 3.2 - 3.7 | Secondary γ' phase formation (Ni₃Ti) | | **Tantalum (Ta)** | 1.8 - 2.2 | Strengthens through carbide formation | | **Niobium (Nb)** | 0.8 - 1.2 | Enhances precipitation hardening | | **Hafnium (Hf)** | 0.8 - 1.2 | Improves grain boundary strength | | **Carbon (C)** | 0.08 - 0.13 | Forms strengthening carbides | | **Boron (B)** | 0.010 - 0.020 | Grain boundary reinforcement | *Note: "Centri-Vac" refers to specialized centrifugal casting and vacuum melting technology.* --- #### **Physical & Mechanical Properties** **Physical Properties:** - Density: 8.25 g/cm³ (0.298 lb/in³) - Melting Range: 1290-1355°C (2354-2471°F) - Thermal Expansion Coefficient: 13.8 μm/m·°C @ 20-600°C - Thermal Conductivity: 18.2 W/m·K @ 500°C - Specific Heat Capacity: 430 J/kg·K @ 20°C **Mechanical Properties (Heat Treated Condition):** - Tensile Strength: 1150 MPa (167 ksi) minimum - Yield Strength (0.2% Offset): 900 MPa (130 ksi) minimum - Elongation: 7% minimum - Reduction of Area: 10% minimum - Creep Rupture Life: >500 hours at 140 MPa/980°C --- #### **International Standards and Specifications** RENE 220 complies with stringent international and proprietary standards: - **AMS 5398:** Investment castings, vacuum melted - **GE S-900:** General Electric proprietary specification - **Pratt & Whitney CS-8000:** Advanced material standard - **Rolls-Royce RRS 900:** Premium grade specification - **ISO 4953:** Superalloy material standard - **OEM-specific Quality Assurance Standards** --- #### **Product Applications** **Aerospace Applications:** - High-pressure turbine blades and vanes - Turbine disks and rotating components - Combustion chamber liners - Afterburner components - Exhaust system structural parts **Industrial & Power Generation:** - Industrial gas turbine hot section components - Power generation turbine blades - Nuclear reactor core components - High-temperature fastening systems - Specialized high-temperature tooling --- #### **Key Advantages** 1. **Exceptional High-Temperature Capability**: Maintains mechanical integrity up to 1100°C (2012°F) 2. **Superior Creep Resistance**: Excellent long-term performance under sustained loading 3. **Enhanced Thermal Fatigue Resistance**: Withstands severe thermal cycling conditions 4. **Outstanding Oxidation Resistance**: Superior performance in oxidizing environments 5. **Optimized Microstructural Stability**: Maintains phase stability during extended exposure 6. **Excellent Castability**: Suitable for complex geometries and directional solidification 7. **Improved Damage Tolerance**: Enhanced resistance to crack propagation 8. **Stable Gamma Prime Distribution**: Maintains strengthening phase integrity --- **Conclusion** RENE 220 Centri-Vac alloy represents the cutting edge of nickel-based superalloy technology, specifically designed to meet the extreme demands of next-generation gas turbine applications. Its sophisticated chemical composition, featuring a balanced distribution of refractory elements and gamma prime formers, delivers unparalleled performance in the most challenging high-temperature environments. The Centri-Vac manufacturing process ensures exceptional metallurgical quality, directional solidification capability, and reliable performance, establishing RENE 220 as the material of choice for critical rotating components where operational safety, efficiency, and longevity are paramount. Governed by the most rigorous international and proprietary standards, this advanced superalloy continues to push the boundaries of high-temperature material performance.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3416 gallon liquid totes Special package is available on request.