Alloy 263,Nimonic 263 Sheet,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 Sheet (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 **sheet** form, this material combines exceptional high-temperature strength with excellent formability, making it ideal for lightweight structural components, liners, and formed parts that must operate reliably at temperatures up to **950°C (1742°F)**. The sheet product offers superior oxidation resistance and thermal fatigue resistance for demanding aerospace and industrial applications. --- #### **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 (Solution Treated & Aged)** **Room Temperature Properties:** - **Tensile Strength**: 950–1150 MPa (138–167 ksi) - **Yield Strength (0.2% Offset)**: 550–750 MPa (80–109 ksi) - **Elongation**: 35–50% - **Hardness**: 240–310 HB - **r-value (Plastic Strain Ratio)**: 0.9–1.1 **Elevated Temperature Performance:** - **650°C (1200°F)**: Tensile Strength ≈ 750 MPa (109 ksi) - **750°C (1380°F)**: Tensile Strength ≈ 500 MPa (73 ksi) - **850°C (1560°F)**: Tensile Strength ≈ 300 MPa (44 ksi) **Formability Parameters:** - **Minimum Bend Radius**: 1.2 × thickness (90° bend) - **Erichen Cupping Value**: 10–12 mm - **Limiting Drawing Ratio**: 2.0–2.2 --- #### **5. Key Characteristics & Advantages** - **Excellent High-Temperature Strength**: Maintains mechanical properties under thermal stress up to 950°C - **Superior Fabricability**: Excellent formability and weldability compared to similar superalloys - **Outstanding Thermal Fatigue Resistance**: Withstands cyclic temperature variations - **Lightweight Structural Capability**: Thin sheet forms provide high strength-to-weight ratio - **Good Weldability**: Can be welded without post-weld heat treatment - **Excellent Oxidation Resistance**: Chromium content provides protection in oxidizing atmospheres - **Age-Hardenable**: Can be heat treated to achieve optimal mechanical properties - **Consistent Thickness Control**: Precision rolled for uniform mechanical properties --- #### **6. Product Applications** **Aerospace & Defense:** - Gas turbine combustion liners and chambers - Afterburner components and heat shields - Exhaust system shrouds and seals - Aircraft firewall structures - Rocket motor components **Power Generation:** - Gas turbine combustion chambers - Transition ducts and seals - Heat shield panels - Exhaust system components - Turbine casing liners **Industrial Processing:** - Furnace liners and radiant panels - Heat treatment fixture components - Process chamber internal panels - High-temperature ducting systems - Thermal reactor components **Other Applications:** - Test and research equipment - Semiconductor processing components - Specialized high-temperature structures --- #### **7. International Standards** | Standard Organization | Standard Designation | Description | |----------------------|---------------------|-------------| | **ASTM International** | ASTM B435 | Plate, Sheet, and Strip | | **ASTM International** | ASTM B906 | General Requirements for Flat-Rolled Nickel Alloys | | **ASME** | SB-435 | Plate, Sheet, and Strip (Pressure Vessel Code) | | **Aerospace (SAE)** | AMS 5872 | Sheet, Strip, and Plate | | **European Standards** | EN 10095 | Heat Resisting Steels and Nickel Alloys | | **ISO** | ISO 6207 | Rolled Nickel and Nickel Alloy Sheet | --- #### **8. Sheet Specifications & Availability** **Thickness Ranges:** - **Ultra-Thin Sheet**: 0.3 mm to 0.8 mm (0.012" to 0.032") - **Standard Sheet**: 0.8 mm to 3.0 mm (0.032" to 0.125") - **Heavy Sheet**: 3.0 mm to 6.0 mm (0.125" to 0.250") **Standard Sizes:** - **Widths**: 600 mm to 1500 mm (24" to 60") - **Lengths**: 1500 mm to 3000 mm (60" to 120") - **Custom Sizes**: Available to customer requirements **Surface Conditions:** - **No. 1 Finish**: Hot rolled, annealed, and descaled - **No. 2D Finish**: Cold rolled, dull finish - **No. 2B Finish**: Cold rolled, bright finish - **BA Finish**: Bright annealed - **Polished Finish**: Special polished surfaces **Tolerances:** - **Thickness**: ±5% standard, ±3% precision - **Width**: ±1 mm standard - **Length**: ±2 mm standard - **Flatness**: ≤ 3 mm per meter --- #### **9. Heat Treatment** **Standard Sheet Heat Treatment:** 1. **Solution Treatment**: 1150°C (2100°F) for 15–30 minutes, rapid cool 2. **Aging Treatment**: 800°C (1470°F) for 8 hours, air cool **Special Considerations:** - Protective atmosphere annealing for bright surfaces - Tension leveling for superior flatness - Controlled cooling to prevent distortion --- #### **10. Fabrication & Processing** **Forming Operations:** - **Deep Drawing**: Good capability with proper tool design - **Stretch Forming**: Suitable for complex contours - **Spinning**: Ideal for axisymmetric components - **Press Brake Forming**: Minimum bend radius = 1.2 × thickness - **Rubber Pad Forming**: Suitable for shallow forms **Welding Procedures:** - **GTAW (TIG)**: Preferred for precision work - **GMAW (MIG)**: Suitable for production welding - **Resistance Welding**: Spot and seam welding possible - **Laser Welding**: For high-precision applications - **Filler Metal**: AWS A5.14 ERNiCrCoMo-1 **Machining Guidelines:** - **Shearing**: Clean edges with minimal burr - **Punching**: Suitable for hole creation - **Laser Cutting**: Excellent results with proper parameters - **Waterjet Cutting**: Ideal for complex shapes --- #### **11. Quality Assurance** **Testing & Inspection:** - **Dimensional Verification**: 100% thickness measurement - **Surface Quality**: Visual and microscopic examination - **Mechanical Testing**: Tensile, hardness, bend testing - **Metallurgical Testing**: Grain size, microstructure analysis - **Flatness Measurement**: Laser scanning for critical applications **Certification:** - Mill test certificates per EN 10204 3.1/3.2 - Chemical analysis reports - Mechanical test reports - Surface quality certification - Full material traceability --- **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 2111 gallon liquid totes Special package is available on request.