Alloy 90,Nimonic 90 Foil,Shim,UNS N07090,E FORU

British Specs:BS HR2 Alloy 90 bar BS HR202 Alloy 90 sheet BS HR402 Alloy 90 tube BS HR501 Alloy 90 wire (springs) BS HR501 Alloy 90 wire (springs)，American Specs:AMS 5829 Welding Wire，German Specs:WS 2.4632

### Technical Datasheet: Alloy 90 / Nimonic 90 Foil & Shim (UNS N07090) --- #### **1. Introduction** **Alloy 90** (commercially known as **Nimonic 90** and standardized as **UNS N07090**) is a nickel-chromium-cobalt superalloy strengthened by age-hardening through titanium and aluminum additions. In **foil and shim** forms, this material delivers exceptional performance in precision applications requiring minimal thickness, superior oxidation resistance, and reliable performance at temperatures up to **920°C (1688°F)**. These ultra-thin product forms are essential for thermal management, sealing, and spacing applications in extreme environments where conventional materials would fail. --- #### **2. Chemical Composition (Weight %)** | Element | Content (%) | Role in the Alloy | |---------|-------------|-------------------| | **Nickel (Ni)** | Balance | Austenitic matrix, high-temperature stability | | **Chromium (Cr)** | 18.0–21.0 | Oxidation and corrosion resistance | | **Cobalt (Co)** | 15.0–21.0 | Solid solution strengthening | | **Titanium (Ti)** | 2.0–3.0 | Primary age-hardening element (γ' former) | | **Aluminum (Al)** | 1.0–2.0 | Secondary age-hardening element | | **Iron (Fe)** | ≤ 3.0 | Residual element | | **Carbon (C)** | ≤ 0.13 | Grain boundary strengthening | | **Silicon (Si)** | ≤ 1.0 | Oxidation resistance | | **Manganese (Mn)** | ≤ 1.0 | Deoxidation | | **Copper (Cu)** | ≤ 0.2 | Residual element | | **Zirconium (Zr)** | ≤ 0.15 | Creep property enhancement | | **Boron (B)** | ≤ 0.010 | Grain boundary strengthening | --- #### **3. Physical Properties** | Property | Value | Condition | |----------|-------|-----------| | **Density** | 8.19 g/cm³ (0.296 lb/in³) | At 20°C | | **Melting Range** | 1360–1385°C (2480–2525°F) | — | | **Thermal Expansion Coefficient** | 13.9 μm/m·°C | 20–100°C | | **Thermal Conductivity** | 11.7 W/m·K | At 20°C | | **Specific Heat** | 440 J/kg·K | At 20°C | | **Modulus of Elasticity** | 214 GPa (31.0 × 10⁶ psi) | At 20°C | | **Electrical Resistivity** | 1.24 μΩ·m | At 20°C | --- #### **4. Mechanical Properties (Varies by Temper)** **Foil Properties (Annealed Condition):** - **Thickness Range**: 0.025 mm to 0.15 mm (0.001" to 0.006") - **Tensile Strength**: 1000–1200 MPa (145–174 ksi) - **Yield Strength (0.2% Offset)**: 600–800 MPa (87–116 ksi) - **Elongation**: 25–35% - **Hardness**: 250–300 HV - **Surface Roughness (Ra)**: ≤ 0.3 μm **Shim Stock Properties (Hard Temper):** - **Thickness Range**: 0.05 mm to 1.0 mm (0.002" to 0.040") - **Tensile Strength**: 1300–1500 MPa (189–218 ksi) - **Yield Strength (0.2% Offset)**: 1100–1300 MPa (160–189 ksi) - **Elongation**: 10–18% - **Hardness**: 350–400 HV **Spring Temper Properties:** - **Tensile Strength**: 1500–1700 MPa (218–247 ksi) - **Yield Strength**: 1300–1500 MPa (189–218 ksi) - **Elongation**: 4–10% --- #### **5. Key Characteristics & Advantages** - **Ultra-Thin Capability**: Available in extremely thin gauges while maintaining integrity and handling strength - **Exceptional Flatness**: Precision rolled to maintain consistent thickness and superior surface quality - **High-Temperature Stability**: Maintains dimensional stability and mechanical properties under repeated thermal cycling - **Excellent Formability**: Can be stamped, blanked, and formed into complex shapes without cracking - **Superior Surface Quality**: Available with various surface finishes including matte, bright, and special coatings - **Consistent Performance**: Uniform properties throughout the coil or sheet length - **Exceptional Oxidation Resistance**: Chromium content provides outstanding protection in oxidizing atmospheres - **Precision Tolerances**: Maintains tight dimensional control for critical applications --- #### **6. Product Applications** **Aerospace & Defense:** - Turbine engine sealing shims and gaskets - Combustion chamber gaskets and seals - Heat shield layers and thermal barriers - Instrumentation mounting shims - Electrical connector shims - Radar and avionics thermal management **Electronics & Electrical:** - High-temperature electrical insulation - Power semiconductor mounting shims - Battery thermal management foils - Electronic connector components - RF shielding applications - Thermocouple compensation leads **Industrial Processing:** - High-temperature furnace gaskets - Thermal processing fixture shims - Heat treatment rack spacers - Vacuum furnace internal seals - Process equipment alignment shims - Temperature sensor mounting pads **Automotive & Energy:** - Turbocharger heat shields - Exhaust system gaskets and shims - Fuel cell components - High-temperature sensor mounts - Battery cooling system components **Specialized Applications:** - Glass manufacturing furnace seals - Semiconductor wafer processing fixtures - Medical device components - Research and laboratory equipment - Precision instrument components --- #### **7. International Standards** **ASTM Specifications:** - **ASTM B435**: Plate, Sheet, and Strip (covers foil and shim) - **ASTM B906**: Standard Specification for General Requirements for Flat-Rolled Nickel and Nickel Alloys - **ASTM E252**: Standard Test Method for Thickness of Foil, Sheet, and Strip by Mass Measurement **Aerospace Specifications:** - **AMS 5872**: Sheet, Strip, and Plate - **AMS 5512**: Sheet and Strip (similar high-temperature alloys) **International Equivalents:** - **ISO 6207**: Rolled nickel and nickel alloy plate, sheet and strip - **DIN 17750**: Nickel and nickel alloy foil and shim - **JIS H4551**: Nickel-chromium-cobalt alloy foil - **GB/T 15008**: Chinese national standard --- #### **8. Product Specifications & Tolerances** **Foil Specifications:** - **Thickness**: 0.025 mm to 0.15 mm (± 3%) - **Width**: 2 mm to 300 mm (± 0.05 mm) - **Standard coil lengths**: 100–500 meters - **Camber**: ≤ 0.5 mm per meter - **Flatness**: ≤ 1.0 mm per meter **Shim Stock Specifications:** - **Thickness**: 0.05 mm to 1.0 mm (± 2%) - **Standard sheet sizes**: 300 × 300 mm to 600 × 1200 mm - **Width tolerances**: ±0.1 mm - **Length tolerances**: ±0.2 mm - **Custom sizes and shapes available** **Available Conditions:** - **Annealed (soft)**: Maximum formability - **Quarter Hard**: Good formability with higher strength - **Half Hard**: Balance of strength and formability - **Full Hard**: High strength, limited formability - **Spring Temper**: Maximum strength and spring properties **Surface Finishes:** - **Matte finish**: Standard mill finish - **Bright annealed**: Smooth, reflective surface - **Special polished**: Ultra-smooth for specific applications - **Coated varieties**: Available with special coatings - **Passivated**: For improved corrosion resistance --- #### **9. Fabrication & Processing** **Stamping & Blanking:** - Suitable for high-speed progressive die stamping - Clean sheared edges with minimal burr - Good blanking characteristics in annealed condition - Recommended clearance: 3–5% of material thickness - Tool life: 75,000–150,000 hits with proper tooling **Forming Operations:** - **Bending**: Minimum bend radius = 0.6 × thickness (annealed) - **Deep Drawing**: Excellent capability with proper tool design - **Spinning**: Suitable for axisymmetric components - **Embossing**: Can be embossed with precise patterns - **Coining**: Suitable for precise dimensional control **Heat Treatment:** - **Solution Treatment**: 1080°C (1975°F), rapid cool - **Aging Treatment**: 700°C (1290°F) for 16 hours - **Bright Annealing**: In protective atmosphere - **Stress Relieving**: 650–750°C (1200–1380°F) **Joining Methods:** - **Resistance Welding**: Excellent capability - **Laser Welding**: Suitable for precision applications - **Electron Beam Welding**: For critical applications - **Brazing**: Compatible with high-temperature brazing alloys - **Adhesive Bonding**: Possible with high-temperature adhesives --- #### **10. Quality Assurance** **Dimensional Control:** - 100% thickness verification using laser gauges - Width and length certification - Flatness measurement using optical flatness testers - Surface quality inspection at 20× magnification - Camber and edge condition monitoring **Testing & Certification:** - **Mechanical Testing**: Tensile, hardness, elongation - **Metallurgical Testing**: Grain size, microstructure analysis - **Surface Quality**: Visual and microscopic examination - **Chemical Analysis**: Full composition verification - **Certification**: Mill test certificates per EN 10204 3.1/3.2 **Special Requirements:** - **Cleanliness**: Specific cleanliness levels available (Class 100–1000) - **Packaging**: Special packaging for sensitive applications - **Traceability**: Full material traceability maintained - **Custom Testing**: Available to customer specifications - **Statistical Process Control**: For production consistency --- **Disclaimer:** This technical data is for informational purposes only. Properties may vary based on manufacturing process, heat treatment, and specific product form. For critical applications, consult current manufacturer technical data sheets and relevant industry standards. Always verify material certification and testing requirements for specific service conditions.

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 2103 gallon liquid totes Special package is available on request.