Alloy 263,Haynes 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

### **Product Data Sheet: Alloy 263 / Haynes 263 Wire (UNS N07263)** **Overview** **Alloy 263** (commercially known as **Haynes 263** and standardized as **UNS N07263**) is a precipitation-hardenable nickel-cobalt-chromium superalloy specifically engineered for high-temperature service. It delivers an exceptional balance of **high-temperature strength, excellent oxidation resistance, and good fabricability**. In the form of **wire**, Alloy 263 is used for applications requiring continuous precision form and consistent performance at elevated temperatures. The wire product form enables the production of critical components through various manufacturing processes including welding, weaving, and machining, making it essential for high-temperature aerospace and industrial applications. --- #### **1. Chemical Composition** The composition is precisely controlled to maintain consistent performance in wire form. | Element | Content (%) (Typical) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | Balance | Forms the austenitic matrix, providing base corrosion resistance and toughness | | **Chromium (Cr)** | 19.0 - 21.0 | Provides excellent oxidation and hot corrosion resistance | | **Cobalt (Co)** | 19.0 - 21.0 | Solid solution strengthener; enhances high-temperature strength | | **Molybdenum (Mo)** | 5.6 - 6.1 | Provides solid solution strengthening and creep resistance | | **Titanium (Ti)** | 1.9 - 2.4 | Primary precipitation hardener (forms γ' phase, Ni₃(Ti,Al)) | | **Aluminum (Al)** | 0.3 - 0.6 | Secondary precipitation hardener; contributes to γ' phase formation | | **Carbon (C)** | 0.04 - 0.08 | Forms carbides for grain boundary strength and stability | | **Manganese (Mn)** | 0.60 max | Aids in manufacturability during wire drawing | | **Silicon (Si)** | 0.40 max | Enhances oxidation resistance | | **Iron (Fe)** | 0.70 max | Residual element, kept low to maintain alloy integrity | | **Boron (B)** | 0.005 max | Strengthens grain boundaries to improve creep life | | **Zirconium (Zr)** | 0.06 max | Trace addition to enhance creep rupture properties | --- #### **2. Physical Properties (Typical)** | Property | Value / Condition | | :--- | :--- | | **Density** | 8.36 g/cm³ (0.302 lb/in³) | | **Melting Range** | 1330 - 1360 °C (2425 - 2480 °F) | | **Specific Heat** | 420 J/kg·K (0.10 Btu/lb·°F) @ 20°C | | **Thermal Conductivity** | 11.6 W/m·K (80.4 Btu·in/hr·ft²·°F) @ 20°C | | **Mean Coefficient of Thermal Expansion** | 12.6 × 10⁻⁶/°C (20 - 100°C) | | | 16.8 × 10⁻⁶/°C (20 - 800°C) | | **Electrical Resistivity** | 1.25 μΩ·m @ 20°C | | **Modulus of Elasticity** | 211 GPa (30.6 × 10⁶ psi) @ 20°C | --- #### **3. Key Characteristics & Mechanical Properties** Alloy 263 wire is typically supplied in the solution-annealed condition for optimal formability, with the ability to be precipitation hardened for high-strength applications. * **Excellent High-Temperature Strength:** Maintains mechanical integrity and creep resistance at temperatures up to 800°C (1470°F) * **Superior Oxidation Resistance:** Chromium content provides protective oxide scale for prolonged service in oxidizing environments up to 980°C (1800°F) * **Good Weldability:** Suitable for use as welding wire for joining similar and dissimilar high-temperature alloys * **Consistent Dimensional Control:** Precision-drawn to tight diameter tolerances * **Surface Quality:** Available with various surface finishes to meet specific application requirements **Typical Mechanical Properties (Solution Annealed Condition)** * **Tensile Strength:** 690 - 860 MPa (100 - 125 ksi) * **Yield Strength (0.2% Offset):** 275 - 415 MPa (40 - 60 ksi) * **Elongation:** 30 - 45% --- #### **4. Product Applications** Alloy 263 wire serves critical functions in high-temperature systems across various industries. * **Welding Applications:** * **Gas Tungsten Arc Welding (GTAW/TIG)** wire for joining Alloy 263 components * **Repair and maintenance welding** of gas turbine components * **Cladding and hardfacing** applications * **Aerospace & Gas Turbine Engines:** * **Turbine blade retention wires** * **High-temperature springs and fasteners** * **Seaming and stitching wires** for combustion liners * **Sensor and thermocouple lead wires** * **Industrial Processing:** * **Heat treatment basket weaving** * **Furnace components and fixtures** * **High-temperature filter media** --- #### **5. International Standards** Alloy 263 wire conforms to various international specifications governing chemical, mechanical, and dimensional requirements. | Standard Type | Standard Number | Title / Specification | | :--- | :--- | :--- | | **Unified Numbering System (UNS)** | **N07263** | All product forms | | **ASTM International** | **ASTM B906** | Standard Specification for General Requirements for Flat-Rolled Nickel and Cobalt Alloys | | **AWS** | **AWS A5.14** | Specification for Nickel and Nickel-Alloy Bare Welding Electrodes and Rods | | **Aerospace (SAE/AMS)** | **AMS 5803** | Wire, Welding; 52Ni - 19Cr - 19Co - 5.2Mo - 2.1Ti - 0.45Al (Alloy 263) | | **European (EN)** | **EN 10302** | Creep resisting steel, nickel and cobalt alloys | | | **2.4650** | Material Number (Werkstoff Nr.) | --- **Summary** **Alloy 263 Wire (Haynes 263, UNS N07263)** provides a versatile product form that maintains the alloy's characteristic high-temperature strength, oxidation resistance, and fabricability in a continuous, precision-drawn format. Its applications span from welding consumables to critical engine components, making it an essential material for high-temperature engineering solutions. Compliance with international standards such as AMS 5803 and AWS A5.14 ensures consistent quality and performance for the most demanding aerospace, power generation, and industrial applications.

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 2130 gallon liquid totes Special package is available on request.