Alloy 263,Haynes 263 Plate,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 Introduction: Alloy 263 / Haynes 263 Plate / UNS N07263** **Alloy 263** (commercially known as **Haynes 263** and standardized as **UNS N07263**) is a precipitation-hardenable nickel-chromium-cobalt superalloy renowned for its exceptional high-temperature strength, outstanding fabricability, and superior oxidation resistance. As a **plate** product, it is the premier choice for manufacturing large, high-integrity structures and components in the aerospace and power generation industries where high strength-to-weight ratio and resistance to extreme thermal environments are critical. Haynes 263 plate offers an excellent combination of high creep strength, good fatigue resistance, and superior weldability. It is typically supplied in the solution-annealed condition, which provides optimal formability for pressing and machining, and can be precipitation-hardened to achieve maximum strength properties for final application. --- ### **1. Chemical Composition** The composition is precisely balanced to create a strong, stable microstructure through gamma-prime [Ni₃(Al, Ti)] precipitation. | Element | Content (%) (Typical) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | Balance | Austenitic matrix; provides base corrosion resistance and toughness. | | **Chromium (Cr)** | 19.0 - 21.0 | Imparts exceptional oxidation and hot corrosion resistance. | | **Cobalt (Co)** | 19.0 - 21.0 | Solid solution strengthener; boosts high-temperature strength. | | **Molybdenum (Mo)**| 5.6 - 6.1 | Provides solid solution strengthening, particularly at intermediate temperatures. | | **Titanium (Ti)** | 1.9 - 2.4 | Primary gamma-prime former (Ni₃Ti) for precipitation hardening. | | **Aluminum (Al)** | 0.3 - 0.6 | Gamma-prime former (Ni₃Al); aids oxidation resistance. | | **Carbon (C)** | 0.04 - 0.08 | Forms carbides for grain boundary strength and creep resistance. | | **Boron (B)** | 0.005 max | Enhances creep ductility and grain boundary strength. | | **Manganese (Mn)**| 0.60 max | Aids in deoxidation during melting. | | **Silicon (Si)** | 0.40 max | Aids in deoxidation during melting. | | **Iron (Fe)** | 0.70 max | Residual element. | | **Copper (Cu)** | 0.20 max | Residual element; kept low to prevent hot shortness. | --- ### **2. Physical Properties** | Property | Value / Condition | | :--- | :--- | | **Density** | 8.36 g/cm³ (0.302 lb/in³) | | **Melting Range** | 1330 - 1360 °C (2425 - 2480 °F) | | **Specific Heat** | 455 J/kg·K (0.109 Btu/lb·°F) @ 20°C | | **Thermal Conductivity**| 11.7 W/m·K (81.0 Btu·in/hr·ft²·°F) @ 20°C | | **Mean Coefficient of Thermal Expansion** | 12.6 μm/m·°C (20-100°C)
16.8 μm/m·°C (20-800°C) | | **Modulus of Elasticity (Tensile)** | 211 GPa (30.6 x 10⁶ psi) @ 20°C | --- ### **3. Mechanical Properties (Typical for Plate Product)** Plate is typically supplied in the solution-annealed condition (Condition A) for fabrication and can be aged (Condition C) for maximum strength. **Room Temperature Tensile Properties (After Full Heat Treatment):** * **Ultimate Tensile Strength:** 950 - 1100 MPa (138 - 160 ksi) * **Yield Strength (0.2% Offset):** 550 - 700 MPa (80 - 102 ksi) * **Elongation:** 25 - 35% **High-Temperature Performance:** Alloy 263 plate retains excellent tensile, creep, and stress-rupture strength up to approximately **850°C (1560°F)**, making it suitable for structural applications at extreme temperatures. --- ### **4. Product Applications (Specific to Plate Forms)** Alloy 263 plate is specified for large, high-integrity structures and components requiring strength at temperature. * **Aerospace & Jet Engines:** * **Combustion Chambers & Liners:** Fabricated from plate by rolling and welding. * **Afterburner Components:** Structural parts requiring high strength at very high temperatures. * **Exhaust Nozzles and Ducts:** Large components fabricated from plate material. * **Turbine Casings and Shrouds:** Structural rings and segments machined from plate. * **Heat Shields:** Protective barriers against high-temperature exhaust. * **Power Generation (Industrial Gas Turbines):** * **Transition Ducts:** Direct hot gas from combustor to turbine section. * **Combustion Casings:** Large-diameter structures housing the combustion system. * **Hot Gas Path Components:** Various structural supports and liners. --- ### **5. International Standards for Plate Products** Alloy 263 plate conforms to various international standards governing sheet and plate forms. | Standard Type | Standard Number & Description | | :--- | :--- | | **Unified Numbering System (UNS)** | **UNS N07263** | | **Aerospace Material Specification (AMS)** | **AMS 5872**: Sheet, Strip, and Plate | | **American Society for Testing and Materials (ASTM)** | **ASTM B906**: Standard Specification for General Requirements for Flat-Rolled Nickel and Nickel Alloys | | **European (EN)** | **EN 10302**: Nickel and Cobalt Alloys
**2.4634** (Material Number) | | **German (DIN/Werkstoff)** | **Werkstoff Nr. 2.4650** | | **ISO** | **ISO 9724**: Nickel-cobalt-chromium-molybdenum alloy | --- ### **Summary** **Alloy 263 (UNS N07263) Plate** is a high-performance nickel-based superalloy plate product designed for the most demanding high-temperature structural applications. Its exceptional balance of elevated temperature strength, oxidation resistance, and fabricability (including weldability and formability) makes it a critical material solution for aerospace combustion systems, exhaust structures, and power generation turbine components. The plate form enables the manufacture of large, complex components that must maintain structural integrity under severe thermal and mechanical stress.

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 2123 gallon liquid totes Special package is available on request.