Alloy 263,Nimonic 263 Forgings,UNS N07263,E FORU

British Specs:BS HR10 BS HR206 BS HR404，American Specs:AMS 5872 Sheet Strip and Plate AMS 5886 Bar and Forgings，German Specs:WS 2.4650

### Technical Datasheet: Alloy 263 / Nimonic 263 Forgings (UNS N07263) --- #### **1. Introduction** **Alloy 263** (commercially known as **Nimonic 263** and standardized as **UNS N07263**) is a nickel-cobalt-chromium superalloy strengthened by precipitation hardening with additions of titanium and aluminum. In **forgings** form, this material achieves superior mechanical properties through controlled deformation processes that refine the microstructure, enhance grain flow, and improve directional strength characteristics. Alloy 263 forgings deliver optimal performance in critical applications requiring exceptional high-temperature strength, oxidation resistance, and structural reliability at temperatures up to **950°C (1742°F)**. --- #### **2. Chemical Composition (Weight %)** | Element | Content (%) | Role in the Alloy | |---------|-------------|-------------------| | **Nickel (Ni)** | Balance | Austenitic matrix, high-temperature stability | | **Chromium (Cr)** | 19.0–21.0 | Oxidation and corrosion resistance | | **Cobalt (Co)** | 19.0–21.0 | Solid solution strengthening | | **Molybdenum (Mo)** | 5.6–6.1 | Solid solution strengthening | | **Titanium (Ti)** | 1.9–2.4 | Primary age-hardening element (γ' former) | | **Aluminum (Al)** | 0.3–0.6 | Secondary age-hardening element | | **Carbon (C)** | 0.04–0.08 | Grain boundary strengthening | | **Iron (Fe)** | ≤ 0.7 | Residual element | | **Silicon (Si)** | ≤ 0.4 | Oxidation resistance | | **Manganese (Mn)** | ≤ 0.6 | Deoxidation | | **Copper (Cu)** | ≤ 0.2 | Residual element | | **Boron (B)** | ≤ 0.005 | Grain boundary strengthening | --- #### **3. Physical Properties** | Property | Value | Condition | |----------|-------|-----------| | **Density** | 8.36 g/cm³ (0.302 lb/in³) | At 20°C | | **Melting Range** | 1330–1360°C (2426–2480°F) | — | | **Thermal Expansion Coefficient** | 14.4 μm/m·°C | 20–100°C | | **Thermal Conductivity** | 11.2 W/m·K | At 20°C | | **Specific Heat** | 431 J/kg·K | At 20°C | | **Modulus of Elasticity** | 218 GPa (31.6 × 10⁶ psi) | At 20°C | | **Electrical Resistivity** | 1.26 μΩ·m | At 20°C | --- #### **4. Mechanical Properties (Forged & Heat Treated)** **Room Temperature Properties:** - **Tensile Strength**: 1000–1200 MPa (145–174 ksi) - **Yield Strength (0.2% Offset)**: 600–800 MPa (87–116 ksi) - **Elongation**: 25–40% - **Reduction of Area**: 30–45% - **Hardness**: 270–330 HB - **Impact Strength**: 50–70 J **Elevated Temperature Performance:** - **650°C (1200°F)**: Tensile Strength ≈ 800 MPa (116 ksi) - **750°C (1380°F)**: Tensile Strength ≈ 550 MPa (80 ksi) - **850°C (1560°F)**: Tensile Strength ≈ 350 MPa (51 ksi) **Creep Rupture Strength (1000 hours):** - **750°C (1380°F)**: ≈ 170 MPa (25 ksi) - **850°C (1560°F)**: ≈ 70 MPa (10 ksi) - **950°C (1742°F)**: ≈ 30 MPa (4 ksi) --- #### **5. Key Characteristics & Advantages** - **Optimized Grain Structure**: Forging process refines grain size and improves mechanical properties - **Superior Directional Properties**: Controlled grain flow pattern enhances strength and fatigue resistance - **Enhanced Density**: Forging eliminates porosity and internal defects common in cast products - **Improved Impact Resistance**: Fine-grained structure provides better toughness and impact strength - **Excellent High-Temperature Capability**: Maintains structural integrity under extreme thermal and mechanical stress - **Superior Thermal Fatigue Resistance**: Withstands repeated thermal cycling without cracking - **Good Weldability**: Can be welded without post-weld heat treatment --- #### **6. Product Applications** **Aerospace & Defense:** - Gas turbine engine discs and hubs - Turbine blades and vanes - Compressor discs and shafts - Combustion chamber components - Afterburner parts - Rocket motor components **Power Generation:** - Gas turbine rotor components - Turbine wheels and shafts - High-temperature valve bodies - Compressor discs - Turbine casings **Industrial Processing:** - High-temperature valve stems and bodies - Furnace roller shafts and supports - Heat treatment fixture components - Process reactor internals - Extrusion dies and components **Other Applications:** - Turbocharger wheels and shafts - High-performance engine components - Test and research equipment - Specialized high-temperature machinery --- #### **7. International Standards** | Standard Organization | Standard Designation | Description | |----------------------|---------------------|-------------| | **ASTM International** | ASTM B564 | Standard Specification for Nickel Alloy Forgings | | **ASTM International** | ASTM B637 | Precipitation-Hardening Nickel Alloy Forgings | | **Aerospace (SAE)** | AMS 5660 | Bars, Forgings, and Rings | | **ASME** | SB-564 | Nickel Alloy Forgings (Pressure Vessel Code) | | **European Standards** | EN 10204 | Metallic Products - Types of Inspection Documents | | **ISO** | ISO 9725 | Nickel alloy forgings for general purposes | --- #### **8. Forging Capabilities & Specifications** **Forging Methods:** - **Open Die Forgings**: Large components up to 5000 kg - **Closed Die Forgings**: Complex shapes with minimal machining allowance - **Ring Rolled Forgings**: Seamless rings up to 3000 mm diameter - **Precision Forgings**: Near-net shape components **Size Ranges:** - **Weight Range**: 1 kg to 5000 kg - **Maximum Dimensions**: 3000 mm diameter × 6000 mm length - **Ring Forgings**: Up to 3000 mm OD × 1500 mm ID × 500 mm height **Quality Classes:** - **Commercial Grade**: General industrial applications - **Aerospace Grade**: Stringent quality requirements - **Nuclear Grade**: Ultra-high quality standards --- #### **9. Heat Treatment** **Standard Forging Heat Treatment:** 1. **Solution Treatment**: 1150°C (2100°F) for 2–8 hours (depending on section size), air cool 2. **Aging Treatment**: 800°C (1470°F) for 8 hours, air cool **Special Heat Treatments:** - **Homogenization**: For large cross-sections - **Stabilization Treatment**: For dimensional stability - **Controlled Cooling**: To prevent distortion and cracking --- #### **10. Quality Assurance & Testing** **Non-Destructive Testing:** - **Ultrasonic Testing**: Per ASTM A388 - **Liquid Penetrant Inspection**: Per ASTM E165 - **Radiographic Examination**: Per ASTM E94 - **Magnetic Particle Testing**: Where applicable **Destructive Testing:** - **Tensile Testing**: At room and elevated temperatures - **Impact Testing**: Charpy V-notch - **Hardness Testing**: Multiple locations - **Macroetch Testing**: Per ASTM E340 - **Microstructural Examination**: Grain size and structure **Certification & Documentation:** - **Chemical Analysis Certification**: Full composition report - **Mechanical Test Reports**: Tensile and impact data - **Heat Treatment Records**: Time-temperature charts - **Non-Destructive Testing Reports**: UT, PT, RT results - **Full Traceability**: From melt to final product --- #### **11. Machining & Fabrication** **Machining Guidelines:** - **Optimal Condition**: Solution treated condition - **Tooling**: Carbide tools with positive rake angles - **Cutting Speed**: 15–25 m/min for turning operations - **Feed Rate**: 0.15–0.35 mm/rev - **Coolant**: Required for heavy machining operations **Welding Considerations:** - **Weldability**: Good with proper procedures - **Preferred Method**: GTAW (TIG) - **Filler Metal**: AWS A5.14 ERNiCrCoMo-1 - **Preheat & Post-Weld Heat Treatment**: Generally not required **Quality Control:** - **First Article Inspection**: For new components - **Statistical Process Control**: For production runs - **Final Inspection**: Before shipment - **Customer Witnessed Testing**: Available upon request --- **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 2114 gallon liquid totes Special package is available on request.