Alloy 90,Nimonic 90 Bar(Round bar, Flat bar),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 Bar (UNS N07090) **Round Bar & Flat Bar** --- #### **1. Introduction** **Alloy 90** (commercially known as **Nimonic 90**, UNS N07090) is a nickel-chromium-cobalt superalloy strengthened by age-hardening through titanium and aluminum additions. Available as **round bar** and **flat bar**, this material is engineered for high-temperature applications requiring exceptional creep resistance, oxidation resistance, and mechanical stability at temperatures up to **920°C (1688°F)**. These product forms are ideal for machining, forging, and fabricating structural components that must withstand severe thermal and mechanical stress conditions. --- #### **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 | --- #### **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 - **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) --- #### **5. Key Characteristics & Advantages** - **Age-Hardenable**: Achieves high strength through precipitation hardening (γ' phase) - **Excellent Creep Resistance**: Suitable for long-term service under sustained load at high temperatures - **Superior Oxidation Resistance**: Chromium content provides excellent protection in oxidizing atmospheres - **Good Machinability**: Can be precision machined in solution treated condition - **High Strength-to-Weight Ratio**: Excellent mechanical properties relative to density - **Thermal Stability**: Resists microstructural degradation during prolonged exposure - **Versatile Product Forms**: Available in round and flat bar configurations for diverse applications --- #### **6. Product Applications** **Round Bar Applications:** - Gas turbine engine blades and discs - Turbine rotor shafts and components - High-temperature fasteners and bolts - Valve stems and pump shafts - Nuclear reactor components **Flat Bar Applications:** - Turbine blade roots and attachments - Structural supports in high-temperature environments - Heat treatment fixture components - Bracket and mounting systems - Machinery components requiring flat stock **Industry Applications:** - **Aerospace**: Engine components, structural supports, fasteners - **Power Generation**: Turbine blades, discs, valve components - **Industrial**: Heat treatment fixtures, high-temperature machinery - **Automotive**: Turbocharger components, high-performance engine parts --- #### **7. International Standards** | Standard Organization | Standard Designation | Description | |----------------------|---------------------|-------------| | **ASTM International** | ASTM B637 | Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock | | **Aerospace (SAE)** | AMS 5660 | Bars, Forgings, and Rings | | **ASME** | SB-637 | Nickel Alloy Bars and Forgings (Pressure Vessel Code) | | **European Standards** | EN 10095 | Heat Resisting Steels and Nickel Alloys | | **ISO** | ISO 6207 | Wrought Nickel and Nickel Alloy Bar | | **Unified Numbering** | UNS N07090 | Material Designation | --- #### **8. Product Specifications & Availability** **Round Bar Specifications:** - **Diameter Range**: 5 mm to 300 mm (0.2" to 12") - **Length**: Standard 3–6 meters (10–20 feet) - **Tolerance**: ±0.1 mm to ±0.5 mm based on diameter - **Straightness**: ≤ 1 mm per meter **Flat Bar Specifications:** - **Thickness**: 5 mm to 100 mm (0.2" to 4") - **Width**: 20 mm to 300 mm (0.8" to 12") - **Length**: Standard 3–6 meters (10–20 feet) - **Flatness**: ≤ 0.5 mm per 100 mm width **Available Conditions:** - **Hot Finished**: Black/scale surface - **Cold Finished**: Turned or ground surface - **Solution Annealed**: Optimized for machining - **Surface Finish**: As-rolled, machined, or ground --- #### **9. Heat Treatment** **Standard Heat Treatment:** 1. **Solution Treatment**: 1080°C (1975°F) for 8 hours, air cool 2. **Aging Treatment**: 700°C (1290°F) for 16 hours, air cool **Special Considerations:** - Controlled atmosphere annealing available - Uniform heating throughout cross-section - Stress relief after machining operations --- #### **10. Fabrication & Machining** **Machining Guidelines:** - **Optimal Condition**: Solution annealed - **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 **Welding Procedures:** - **Preferred Method**: GTAW (TIG) - **Filler Metal**: AWS A5.14 ERNiCr-3 - **Preheat**: Generally not required - **Post-Weld Heat Treatment**: Solution annealing recommended **Forming Operations:** - **Hot Working**: 1050–1150°C (1920–2100°F) - **Cold Working**: Possible with intermediate annealing - **Bending**: Minimum radius = 2 × thickness (flat bar) --- #### **11. Quality Assurance** - Chemical analysis certification - Mechanical testing reports - Ultrasonic testing per ASTM A388 - Dimensional verification - Surface quality inspection - Full material traceability - Compliance with international standards --- **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 2094 gallon liquid totes Special package is available on request.