Alloy 90,Nimonic 90 Rod,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 Rod (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 additions of titanium and aluminum. In **rod** form, this material provides exceptional high-temperature strength, excellent creep resistance, and outstanding oxidation resistance at temperatures up to **920°C (1688°F)**. The rod product is specifically designed for machining critical components that must maintain mechanical integrity under severe thermal and mechanical stress conditions in aerospace, power generation, 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 (γ' former) | | **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% - **Reduction of Area**: 25–35% - **Hardness**: 320–380 HB - **Impact Strength**: 25–40 J **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) **Creep Rupture Strength (1000 hours):** - **750°C (1380°F)**: ≈ 200 MPa (29 ksi) - **850°C (1560°F)**: ≈ 80 MPa (12 ksi) - **920°C (1688°F)**: ≈ 35 MPa (5 ksi) --- #### **5. Key Characteristics & Advantages** - **Age-Hardenable**: Achieves high strength through precipitation hardening (γ' phase) - **Excellent Creep Resistance**: Maintains load-bearing capability under sustained stress at high temperatures - **Superior Oxidation Resistance**: Chromium content provides excellent protection against oxidizing environments - **Good Machinability**: Can be machined to precise tolerances in solution treated condition - **High Strength-to-Weight Ratio**: Excellent mechanical properties relative to density - **Thermal Stability**: Resists microstructural degradation during prolonged high-temperature exposure - **Consistent Quality**: Rod form ensures uniform microstructure and mechanical properties throughout length --- #### **6. Product Applications** **Aerospace & Defense:** - Gas turbine engine blades and vanes - Turbine discs and rotor components - Combustion chamber parts - Afterburner components - Engine mounting bolts and fasteners **Industrial Gas Turbines:** - Turbine blades - Rotor shafts - High-temperature fasteners - Sealing components - Compressor parts **Power Generation:** - Steam turbine blades - High-temperature bolting - Valve stems and components - Nuclear reactor components **Automotive & Racing:** - Turbocharger shafts - High-performance engine valves - Exhaust system components - Racing engine components **Other Applications:** - Heat treatment fixture components - Chemical processing equipment - High-temperature springs - Specialized fasteners --- #### **7. International Standards** **ASTM Specifications:** - **ASTM B637**: Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock **Aerospace Specifications:** - **AMS 5660**: Bars, Forgings, and Rings (Solution Heat Treated and Aged) - **AMS 5702**: Wire, Welding **European Standards:** - **EN 10095**: Heat resisting steels and nickel alloys - **BS HR 502**: Nickel-chromium-cobalt-titanium-aluminum alloy - **DIN 17742**: Wrought nickel and nickel alloys **International Equivalents:** | Country/Region | Standard | Equivalent Designation | |----------------|----------|------------------------| | **UNS** | N07090 | Material Designation | | **ISO** | ISO 6207 | NiCr20Co18Ti | | **Germany** | DIN 17742 | NiCr20Co18Ti | | **Japan** | JIS H4551 | NCF 90 | | **China** | GB/T 15008 | GH4090 | --- #### **8. Rod Specifications & Availability** **Diameter Range:** - **Small Diameter**: 3 mm to 20 mm (0.125" to 0.75") - **Medium Diameter**: 20 mm to 100 mm (0.75" to 4") - **Large Diameter**: 100 mm to 300 mm (4" to 12") **Lengths:** - **Standard Lengths**: 3–6 meters (10–20 feet) - **Cut-to-Length**: Available per customer requirements - **Random Lengths**: For large diameter rods **Surface Finish:** - **Hot Finished**: Black/scale surface - **Turned**: Smooth machined surface - **Ground**: Precision ground finish - **Polished**: Special finish available **Tolerances:** - **Diameter Tolerance**: h11 for standard, h9 for precision - **Straightness**: 1 mm per meter maximum - **Out-of-Round**: ≤ 0.5% of diameter --- #### **9. Heat Treatment** **Standard Heat Treatment for Rods:** 1. **Solution Treatment**: 1080°C (1975°F) for 8 hours, air cool 2. **Aging Treatment**: 700°C (1290°F) for 16 hours, air cool **Alternative Treatments:** - Modified solution temperatures for specific applications - Double aging for optimized creep resistance - Stress relief treatments for machined components --- #### **10. Fabrication & Machining** **Machining Guidelines:** - **Optimal Condition**: Solution treated condition - **Tooling**: Carbide tools with positive rake angles - **Cutting Speed**: 10–20 m/min for turning operations - **Feed Rate**: 0.1–0.3 mm/rev - **Coolant**: Required for heavy machining operations **Welding Procedures:** - **Preferred Method**: GTAW (TIG) - **Filler Metal**: AWS A5.14 ERNiCr-3 - **Preheat**: Generally not required - **Post-Weld Heat Treatment**: Solution annealing recommended **Quality Control:** - Ultrasonic testing per ASTM A388 - Liquid penetrant inspection per ASTM E165 - Dimensional verification - Surface quality inspection --- #### **11. Quality Assurance** - Chemical analysis certification - Mechanical testing reports - Non-destructive testing reports - Heat treatment records - Full traceability with heat numbers - Compliance with customer specifications --- **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 2093 gallon liquid totes Special package is available on request.