Alloy 263,Haynes 263 Foil,Shim,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 Foil & Shim (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**. In the form of **Foil and Shim**, Alloy 263 is precision-rolled to extremely thin gauges, typically ranging from 0.25 mm (0.010 inches) down to as thin as 0.025 mm (0.001 inches) or less for foil. This product form is designed for applications where minimal thickness, precise tolerances, and exceptional performance in extreme thermal environments are critical. The alloy's excellent formability in the solution-annealed state allows it to be easily stamped, formed, or wrapped, while subsequent aging can develop high strength. --- #### **1. Chemical Composition** The composition is precisely controlled to ensure consistent performance in thin sections. | 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 during hot working. | | **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. | | **Zirconium (Zr)** | 0.06 max | Trace addition to enhance creep 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 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 Foil & Shim** * **Extreme Thinness & Precision:** Foil is typically supplied under 0.1 mm (0.004"), while shims are supplied in precise thicknesses for dimensional correction, often with a protective coating. * **Excellent Formability:** In the solution-annealed condition, the foil can be easily stamped, punched, or formed into complex seals and gaskets. * **High-Temperature Strength:** Maintains mechanical integrity and resists sagging or creep under load at temperatures up to 800°C (1470°F) and beyond. * **Superior Oxidation Resistance:** The high Chromium content provides a protective, self-healing oxide scale, making it ideal for continuous use in oxidizing atmospheres up to 980°C (1800°F). * **Controlled Thermal Expansion:** Its predictable coefficient of thermal expansion is critical for designing seals and gaps in high-temperature assemblies. --- #### **4. Product Applications** Alloy 263 foil and shim are used in highly engineered, space-constrained, high-temperature environments. * **Aerospace & Gas Turbine Engines:** * **Combustion Seal Segments** and **Turbine Hub Seals** * **Interstage Seals** and **Wear Strips** * **Thermal Barrier Spacers** and **Heat Shields** * **Gaskets** for high-temperature exhaust and casing joints * **Power Generation:** * **Sealing and Shimming** in hot gas paths of land-based gas turbines. * **Vacuum & Heat Treating Furnaces:** * **Thermal Shields** and **Radiation Baffles** * **Electronics:** * **High-Temperature Heater Plates** and **Support Strips** for semiconductor processing. --- #### **5. International Standards** Alloy 263 foil and shim are often supplied to generic material specifications, with thickness and tolerance requirements defined by customer drawings. | 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 *(The primary specification governing foil/shim)* | | **Aerospace (SAE/AMS)** | **AMS 5876** | Sheet, Strip, and Plate; Solution Annealed (Covers the base material from which foil is produced) | | **European (EN)** | **EN 10302** | Creep resisting steel, nickel and cobalt alloys | | | **2.4650** | Material Number (Werkstoff Nr.) | | **Dimensional Standards** | Customer Drawings | Foil and shim are typically custom-ordered to specific thickness, width, and tolerance requirements. | --- **Summary** **Alloy 263 Foil and Shim (Haynes 263, UNS N07263)** represent the ultimate product form of this superalloy for extreme temperature sealing and spacing applications. Its ability to be processed to ultra-thin gauges while retaining the core properties of high strength, exceptional oxidation resistance, and good formability makes it an indispensable material for closing critical gaps and managing heat in the most challenging environments, particularly in the hot sections of jet engines and industrial turbines. Compliance with ASTM and AMS standards ensures the material meets the rigorous quality demands of these industries.

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 2129 gallon liquid totes Special package is available on request.