Alloy 263,Nimonic 263 Wire,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 Wire (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 **wire** form, this material combines exceptional high-temperature strength with excellent fabricability, making it ideal for applications requiring continuous performance at temperatures up to **950°C (1742°F)**. The wire product offers excellent drawability, consistent dimensional control, and superior surface quality for both structural and functional applications in demanding thermal environments. --- #### **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 (Varies by Temper and Diameter)** **Annealed Condition:** - **Tensile Strength**: 800–1000 MPa (116–145 ksi) - **Yield Strength (0.2% Offset)**: 400–600 MPa (58–87 ksi) - **Elongation**: 35–50% - **Reduction of Area**: 40–55% - **Hardness**: 220–280 HV **Hard Drawn Condition:** - **Tensile Strength**: 1100–1300 MPa (160–189 ksi) - **Yield Strength (0.2% Offset)**: 900–1100 MPa (131–160 ksi) - **Elongation**: 15–25% - **Reduction of Area**: 25–40% - **Hardness**: 320–380 HV **Spring Temper:** - **Tensile Strength**: 1300–1500 MPa (189–218 ksi) - **Yield Strength (0.2% Offset)**: 1100–1300 MPa (160–189 ksi) - **Elongation**: 8–15% - **Hardness**: 380–440 HV **Elevated Temperature Performance:** - Maintains excellent mechanical properties up to 950°C (1742°F) - Superior creep resistance in wire form - Excellent thermal fatigue resistance --- #### **5. Key Characteristics & Advantages** - **Excellent Drawability**: Capable of being drawn to fine diameters while maintaining surface quality and mechanical integrity - **Superior High-Temperature Strength**: Maintains mechanical properties and resistance to sagging at elevated temperatures - **Outstanding Oxidation Resistance**: Forms protective, self-healing chromium oxide scale in high-temperature environments - **Consistent Dimensional Control**: Tight diameter tolerances and uniform mechanical properties throughout wire length - **Excellent Weldability**: Suitable for use as welding electrode and filler wire in high-temperature applications - **Good Spring Properties**: Maintains spring characteristics and load retention at high temperatures - **Age-Hardenable**: Can be precipitation hardened to achieve specific mechanical properties - **Excellent Surface Quality**: Smooth, defect-free surface suitable for critical applications --- #### **6. Product Applications** **Aerospace & Defense:** - Gas turbine engine safety wiring - Combustion chamber support wiring - High-temperature spring components - Afterburner ignition systems - Thermal protection system fasteners - Electrical and instrumentation wiring **Industrial Processing:** - Furnace heating element supports - Heat treatment fixture components - High-temperature spring assemblies - Thermal processing hangers and supports - Sintering furnace conveyor belts - Temperature sensor leads **Fastener & Spring Manufacturing:** - High-temperature fasteners and bolts - Spring components for elevated temperature service - Lock wire for high-temperature applications - Custom formed wire components - Retaining rings and clips **Welding & Fabrication:** - GTAW (TIG) welding wire - High-temperature repair and maintenance - Cladding and hardfacing applications - Fabrication of high-temperature assemblies - Repair of turbine components **Electrical & Electronics:** - High-temperature electrical leads - Thermocouple extension wires - Heating element wires - Electrical connector springs - Resistance welding electrodes --- #### **7. International Standards** **ASTM Specifications:** - **ASTM B637**: Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock - **ASTM B751**: General Requirements for Wire - **ASTM B730**: Standard Specification for Welding Wire **Aerospace Specifications:** - **AMS 5702**: Wire, Welding (Nickel Alloy, Corrosion and Heat-Resistant) - **AMS 5660**: Bars, Forgings, and Rings (base material reference) **International Equivalents:** - **ISO 6207**: Rolled nickel and nickel alloy wire - **DIN 17752**: Nickel-cobalt-chromium alloy wire - **JIS H4551**: Nickel-cobalt-chromium alloy wire - **GB/T 15008**: Chinese national standard **Industry Specifications:** - **AWS A5.14**: Specification for Nickel and Nickel-Alloy Bare Welding Electrodes and Rods - **MIL-W-87164**: Military specification for wire, nickel alloy --- #### **8. Wire Specifications & Availability** **Diameter Range:** - **Fine Wire**: 0.10 mm to 1.0 mm (± 0.003 mm) - **Medium Wire**: 1.0 mm to 5.0 mm (± 0.01 mm) - **Coarse Wire**: 5.0 mm to 12.0 mm (± 0.03 mm) - **Special diameters available on request** **Available Forms:** - **Spooled wire**: 1–500 kg spools - **Straight lengths**: 1–6 meters - **Cut pieces**: Custom lengths - **Shaped wire**: Square, rectangular, hexagonal - **Coiled wire**: For spring manufacturing **Surface Conditions:** - **Bright finished**: Clean, oxide-free surface - **Pickled and cleaned**: Chemical cleaning - **Oxidized**: Heat treated surface - **Plated varieties**: Available with special coatings - **Lubricated**: For drawing and forming **Temper Conditions:** - **Annealed**: Maximum ductility - **As-Drawn**: Various strength levels - **Stress-Relieved**: For spring applications - **Age-Hardened**: Maximum strength --- #### **9. Quality Assurance** **Dimensional Control:** - 100% diameter verification - Ovality and straightness checking - Surface quality inspection - Length measurement and certification **Testing & Certification:** - **Mechanical Testing**: Tensile, yield strength, elongation - **Metallurgical Testing**: Grain size, microstructure - **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 - **Packaging**: Special packaging for sensitive applications - **Traceability**: Full material traceability maintained - **Custom Testing**: Available to customer specifications --- #### **10. Fabrication & Processing** **Wire Drawing:** - Multiple pass drawing capability - Intermediate annealing as required - Precise diameter control - Excellent surface finish maintenance **Forming Operations:** - **Cold Forming**: Excellent capability in annealed condition - **Spring Coiling**: Suitable for high-temperature springs - **Wire EDM**: Compatible for precision components - **Heading**: For fastener manufacturing **Heat Treatment:** - **Solution Treatment**: 1150°C (2100°F), rapid cool - **Aging Treatment**: 800°C (1470°F) for 8 hours - **Stress Relieving**: 650–750°C (1200–1380°F) **Welding & Joining:** - **GTAW (TIG)**: Excellent weldability - **GMAW (MIG)**: Suitable for production welding - **Resistance Welding**: Good capability - **Brazing**: Compatible with high-temperature alloys --- **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 2117 gallon liquid totes Special package is available on request.