Alloy 263,Haynes 263 Strip,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 Strip (UNS N07263)** **Overview** Alloy 263 (commercially known as Haynes 263 and standardized as UNS N07263) is a precipitation-hardenable nickel-cobalt-chromium superalloy. It is specifically engineered to deliver an exceptional balance of **high-temperature strength, outstanding oxidation resistance, and superb fabricability**. The **strip** form of Alloy 263 is characterized by its thin, precise, and uniform cross-section, making it the ideal material for intricate, high-performance components manufactured through stamping, photochemical etching, or deep drawing processes. Its excellent formability in the solution-annealed condition, followed by a simple aging treatment to achieve peak strength, makes it a highly efficient and reliable choice for demanding applications. --- #### **1. Chemical Composition** The composition is precisely controlled to optimize its performance as a strip product for forming and welding. | 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 | Imparts superior resistance to oxidation and hot corrosion. | | **Cobalt (Co)** | 19.0 - 21.0 | Solid solution strengthener; significantly enhances high-temperature strength. | | **Molybdenum (Mo)** | 5.6 - 6.1 | Provides solid solution strengthening and resistance to creep deformation. | | **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 the γ' phase. | | **Carbon (C)** | 0.04 - 0.08 | Forms carbides for grain boundary strength and stability. | | **Manganese (Mn)** | 0.60 max | Aids in manufacturability and controls sulfur. | | **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 for Strip)** | 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 x 10⁻⁶/°C (20 - 100°C) | | | 16.8 x 10⁻⁶/°C (20 - 800°C) | | **Electrical Resistivity** | 1.25 μΩ·m @ 20°C | | **Modulus of Elasticity** | 211 GPa (30.6 x 10⁶ psi) @ 20°C | --- #### **3. Key Characteristics of 263 Strip** * **Excellent Formability:** In the solution-annealed condition, the strip can be readily stamped, deep-drawn, and formed into complex shapes. * **Precipitation Hardenable:** Achieves its high strength through a straightforward two-step heat treatment (solution treat + age). * **High Strength-to-Weight Ratio:** Essential for weight-critical aerospace components. * **Superior Oxidation Resistance:** The high Chromium content provides a protective oxide scale, allowing prolonged use at temperatures up to 980°C (1800°F) in oxidizing environments. * **Good Weldability:** Can be welded using all common techniques, with post-weld heat treatment used to restore properties in the heat-affected zone. **Typical Mechanical Properties (Precipitation-Hardened Strip)** * **Tensile Strength:** > 1000 MPa (145 ksi) * **Yield Strength (0.2% Offset):** > 600 MPa (87 ksi) * **Elongation:** > 20% --- #### **4. Product Applications** The thin, uniform gauge and superior properties of Alloy 263 strip make it suitable for highly engineered, often complex components. * **Aerospace & Gas Turbine Engines:** * **Combustion Chamber Liners and Floatwalls** * **Turbine Seals and Shrouds** * **Stator Vane Assemblies** * **Afterburner Components** * **Exhaust Ducting** * **Power Generation:** * **Hot Gas Path Components** in land-based gas turbines. * **Specialty Electronics:** * **Test Sockets** and other high-temperature fixtures. * **General Engineering:** * **High-Temperature Springs, Diaphragms, and Bellows.** --- #### **5. International Standards** Alloy 263 strip is covered by several international specifications that define its 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 Plate, Sheet, and Strip | | **Aerospace (SAE/AMS)** | **AMS 5876** | Sheet, Strip, and Plate; Solution Annealed | | **European (EN)** | **EN 10302** | Creep resisting steel, nickel and cobalt alloys | | | **2.4650** | Material Number (Werkstoff Nr.) | | **British (BS)** | **BS HR 203** | Sheet and Strip | --- **Summary** **Alloy 263 Strip (Haynes 263, UNS N07263)** is a high-performance nickel-based superalloy in a form optimized for precision manufacturing. Its unique combination of ease of fabrication and the ability to develop high strength through heat treatment makes it the material of choice for critical, thin-gauge components in the hottest sections of jet engines and industrial gas turbines. Its compliance with stringent international standards guarantees consistent performance and reliability for the most demanding 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 2125 gallon liquid totes Special package is available on request.