Alloy 90,Nimonic 90 Sheet,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 Sheet (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 **sheet** form, this material combines exceptional high-temperature strength with excellent formability, making it ideal for lightweight structural components, liners, and formed parts that must operate reliably at temperatures up to **920°C (1688°F)**. The sheet product offers superior oxidation resistance and creep strength for demanding aerospace and industrial applications. --- #### **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 (Solution Treated & Aged)** **Room Temperature Properties:** - **Tensile Strength**: 1200–1400 MPa (174–203 ksi) - **Yield Strength (0.2% Offset)**: 800–950 MPa (116–138 ksi) - **Elongation**: 20–30% - **Hardness**: 320–380 HB - **r-value (Plastic Strain Ratio)**: 0.8–1.0 **Elevated Temperature Performance:** - **650°C (1200°F)**: Tensile Strength ≈ 950 MPa (138 ksi) - **750°C (1380°F)**: Tensile Strength ≈ 700 MPa (102 ksi) - **850°C (1560°F)**: Tensile Strength ≈ 400 MPa (58 ksi) **Formability Parameters:** - **Minimum Bend Radius**: 1.5 × thickness (90° bend) - **Erichen Cupping Value**: 9–11 mm - **Limiting Drawing Ratio**: 1.8–2.0 --- #### **5. Key Characteristics & Advantages** - **Excellent High-Temperature Strength**: Maintains mechanical properties under thermal stress up to 920°C - **Superior Creep Resistance**: Outstanding performance under sustained load at elevated temperatures - **Good Formability**: Can be deep drawn, spun, and stamped into complex shapes - **Lightweight Structural Capability**: Thin sheet forms provide high strength-to-weight ratio - **Excellent Oxidation Resistance**: Chromium content provides protection in oxidizing atmospheres - **Age-Hardenable**: Can be heat treated to achieve optimal mechanical properties - **Thermal Stability**: Resists dimensional changes during thermal cycling - **Consistent Thickness Control**: Precision rolled for uniform mechanical properties --- #### **6. Product Applications** **Aerospace & Defense:** - Gas turbine engine combustion liners - Afterburner components and heat shields - Exhaust system shrouds and seals - Aircraft firewall structures - Rocket motor components **Power Generation:** - Gas turbine heat shield panels - Combustion chamber liners - Exhaust ducting components - Heat exchanger parts - Boiler internal liners **Industrial Processing:** - Furnace liners and radiant panels - Heat treatment fixture components - Brazing and sintering trays - Process chamber internal panels - High-temperature duct liners **Other Applications:** - Glass manufacturing furnace components - Ceramic kiln furniture - Semiconductor processing equipment - Automotive exhaust system components --- #### **7. International Standards** | Standard Organization | Standard Designation | Description | |----------------------|---------------------|-------------| | **ASTM International** | ASTM B435 | Plate, Sheet, and Strip | | **ASTM International** | ASTM B906 | General Requirements for Flat-Rolled Nickel Alloys | | **ASME** | SB-435 | Plate, Sheet, and Strip (Pressure Vessel Code) | | **Aerospace (SAE)** | AMS 5872 | Sheet, Strip, and Plate | | **European Standards** | EN 10095 | Heat Resisting Steels and Nickel Alloys | | **ISO** | ISO 6207 | Rolled Nickel and Nickel Alloy Sheet | --- #### **8. Sheet Specifications & Availability** **Thickness Ranges:** - **Ultra-Thin Sheet**: 0.3 mm to 0.8 mm (0.012" to 0.032") - **Standard Sheet**: 0.8 mm to 3.0 mm (0.032" to 0.125") - **Heavy Sheet**: 3.0 mm to 6.0 mm (0.125" to 0.250") **Standard Sizes:** - **Widths**: 600 mm to 1500 mm (24" to 60") - **Lengths**: 1500 mm to 3000 mm (60" to 120") - **Custom Sizes**: Available to customer requirements **Surface Conditions:** - **No. 1 Finish**: Hot rolled, annealed, and descaled - **No. 2D Finish**: Cold rolled, dull finish - **No. 2B Finish**: Cold rolled, bright finish - **BA Finish**: Bright annealed - **Polished Finish**: Special polished surfaces **Tolerances:** - **Thickness**: ±5% standard, ±3% precision - **Width**: ±1 mm standard - **Length**: ±2 mm standard - **Flatness**: ≤ 3 mm per meter --- #### **9. Heat Treatment** **Standard Sheet Heat Treatment:** 1. **Solution Treatment**: 1080°C (1975°F) for 15–30 minutes, rapid cool 2. **Aging Treatment**: 700°C (1290°F) for 16 hours, air cool **Special Considerations:** - Protective atmosphere annealing for bright surfaces - Tension leveling for superior flatness - Controlled cooling to prevent distortion --- #### **10. Fabrication & Processing** **Forming Operations:** - **Deep Drawing**: Good capability with proper tool design - **Stretch Forming**: Suitable for complex contours - **Spinning**: Ideal for axisymmetric components - **Press Brake Forming**: Minimum bend radius = 1.5 × thickness - **Rubber Pad Forming**: Suitable for shallow forms **Welding Procedures:** - **GTAW (TIG)**: Preferred for precision work - **GMAW (MIG)**: Suitable for production welding - **Resistance Welding**: Spot and seam welding possible - **Laser Welding**: For high-precision applications - **Filler Metal**: AWS A5.14 ERNiCr-3 **Machining Guidelines:** - **Shearing**: Clean edges with minimal burr - **Punching**: Suitable for hole creation - **Laser Cutting**: Excellent results with proper parameters - **Waterjet Cutting**: Ideal for complex shapes --- #### **11. Quality Assurance** **Testing & Inspection:** - **Dimensional Verification**: 100% thickness measurement - **Surface Quality**: Visual and microscopic examination - **Mechanical Testing**: Tensile, hardness, bend testing - **Metallurgical Testing**: Grain size, microstructure analysis - **Flatness Measurement**: Laser scanning for critical applications **Certification:** - Mill test certificates per EN 10204 3.1/3.2 - Chemical analysis reports - Mechanical test reports - Surface quality certification - Full material traceability --- **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 2098 gallon liquid totes Special package is available on request.