Udimet 500 Nickel Alloy (UNS N07500)，1

### **Product Introduction: Udimet® 500 Nickel Alloy (UNS N07500)** **Udimet® 500** is a precipitation-hardenable nickel-chromium-cobalt superalloy renowned for its exceptional high-temperature strength, excellent creep resistance, and outstanding oxidation resistance. This premium superalloy combines superior mechanical properties with good fabricability, making it particularly suitable for critical components in gas turbine engines and other high-temperature applications where reliability and performance are paramount. The alloy's optimized composition enables it to maintain excellent mechanical properties at temperatures up to 980°C (1800°F), while its balanced chemistry provides robust resistance to oxidation and thermal fatigue in demanding service environments. --- ### **Chemical Composition** | Element | Content (%) | |---------|-------------| | **Nickel (Ni)** | 48.0 - 55.0 | | **Chromium (Cr)** | 17.0 - 20.0 | | **Cobalt (Co)** | 15.0 - 20.0 | | **Molybdenum (Mo)** | 4.0 - 5.0 | | **Titanium (Ti)** | 2.9 - 3.4 | | **Aluminum (Al)** | 2.5 - 3.3 | | **Iron (Fe)** | 4.0 max | | **Carbon (C)** | 0.08 - 0.15 | | **Boron (B)** | 0.003 - 0.008 | | **Zirconium (Zr)** | 0.02 - 0.10 | | **Manganese (Mn)** | 0.75 max | | **Silicon (Si)** | 0.75 max | | **Copper (Cu)** | 0.50 max | --- ### **Physical Properties** | Property | Value | |----------|-------| | **Density** | 8.08 g/cm³ | | **Melting Point** | 1260 - 1340 °C | | **Thermal Conductivity** | 12.5 W/m·K (at 20°C) | | **Electrical Resistivity** | 1.28 μΩ·m | | **Modulus of Elasticity** | 221 GPa | | **Coefficient of Thermal Expansion** | 13.8 μm/m·°C (20-800°C) | | **Specific Heat Capacity** | 460 J/kg·K | | **Magnetic Response** | Essentially non-magnetic | --- ### **Mechanical Properties** **Solution Annealed Condition:** - **Tensile Strength:** 965 - 1170 MPa - **Yield Strength (0.2% Offset):** 620 - 830 MPa - **Elongation:** 20 - 30% - **Hardness:** 28 - 38 HRC **Aged Condition:** - **Tensile Strength:** 1310 - 1515 MPa - **Yield Strength (0.2% Offset):** 965 - 1170 MPa - **Elongation:** 12 - 20% - **Hardness:** 38 - 46 HRC **High-Temperature Performance:** - **Creep Rupture Strength (815°C/100h):** 240 MPa - **Stress Rupture Life (870°C/170 MPa):** >100 hours - **Excellent thermal fatigue resistance** --- ### **Heat Treatment** **Standard Heat Treatment:** - **Solution Treatment:** 1080 - 1120°C (1975 - 2050°F), 4 hours, air cool or faster - **Aging Treatment:** 845 - 870°C (1550 - 1600°F), 24 hours, air cool + 760°C (1400°F), 16 hours, air cool **Alternative Treatments:** - Double aging treatments for optimized properties - Stress relief treatments for complex components --- ### **Key Characteristics & Advantages** 1. **Exceptional High-Temperature Strength** - Superior creep and stress rupture properties - Excellent thermal fatigue resistance - Maintains mechanical integrity up to 980°C 2. **Advanced Precipitation Hardening** - Gamma prime (γ') strengthening phase - Controlled precipitation kinetics - Stable microstructure during long-term exposure 3. **Superior Environmental Resistance** - Excellent oxidation resistance up to 1100°C - Good resistance to hot corrosion - Stable protective oxide layer formation 4. **Good Fabricability** - Can be forged and hot worked - Suitable for conventional machining processes - Can be welded using appropriate techniques --- ### **Product Applications** **Aerospace Industry:** - Gas turbine blades and vanes - Turbine disks and rotors - Combustion chamber components - Afterburner parts **Power Generation:** - Industrial gas turbine components - Turbine wheels and disks - Power plant turbine parts - High-temperature fasteners **Industrial Applications:** - High-temperature tooling - Nuclear reactor components - Chemical processing equipment - Specialized fasteners and bolting --- ### **International Standards** | Standard Type | Standard Number | Description | |---------------|-----------------|-------------| | **UNS** | N07500 | Unified Numbering System | | **AMS** | 5706 | Bar, Forgings, and Rings | | **ASTM** | B637 | Rod, Bar, and Forgings | | **ASME** | SB-637 | Code Cases | | **DIN** | 2.4980 | Material Number | --- ### **Summary** **Udimet® 500 (UNS N07500)** represents a premium-grade precipitation-hardenable nickel-chromium-cobalt superalloy that delivers exceptional high-temperature performance for the most demanding aerospace and industrial applications. Its optimized composition provides an outstanding balance of high-temperature strength, creep resistance, and oxidation resistance, making it particularly valuable for critical rotating components in gas turbine engines and power generation equipment. The alloy's ability to maintain mechanical properties at temperatures up to 980°C, combined with its stable microstructure and reliable long-term performance, establishes it as a trusted material solution for applications where failure is not an option. Certification to major international standards including AMS 5706, ASTM B637, and ASME SB-637 ensures consistent quality and reliability, providing engineers with a proven material for advancing technology in high-temperature engineering applications where performance, durability, and safety are critical requirements.

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 3358 gallon liquid totes Special package is available on request.