Alloy 263,Nimonic 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

### Technical Datasheet: Alloy 263 / Nimonic 263 Plate (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 **plate** form, this material provides exceptional structural capability for applications requiring superior high-temperature strength, excellent fabricability, and outstanding thermal fatigue resistance at temperatures up to **950°C (1742°F)**. The plate product is ideal for fabricating large components that must withstand severe thermal stress and corrosive conditions in aerospace, power generation, 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**: 30–45% - **Hardness**: 250–320 HB - **Impact Strength**: 45–65 J **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) **Creep Rupture Strength (1000 hours):** - **750°C (1380°F)**: ≈ 150 MPa (22 ksi) - **850°C (1560°F)**: ≈ 60 MPa (9 ksi) --- #### **5. Key Characteristics & Advantages** - **Excellent High-Temperature Strength**: Maintains structural integrity under severe thermal and mechanical stress - **Superior Fabricability**: Excellent hot and cold workability compared to similar superalloys - **Outstanding Thermal Fatigue Resistance**: Withstands cyclic temperature variations - **Good Weldability**: Can be welded without post-weld heat treatment using conventional methods - **Excellent Oxidation Resistance**: Chromium content provides protection in oxidizing atmospheres - **Age-Hardenable**: Can be heat treated to optimize mechanical properties - **Good Machinability**: Can be precision machined in solution treated condition - **Structural Reliability**: Plate form provides uniform properties throughout thickness --- #### **6. Product Applications** **Aerospace & Defense:** - Gas turbine combustion chambers - Afterburner components and heat shields - Exhaust system components - Structural support plates in high-temperature zones - Missile and rocket components **Power Generation:** - Gas turbine combustion liners - Heat shield plates - Transition duct components - Turbine structural supports - High-temperature casing sections **Industrial Processing:** - Heat treatment furnace components - Hot work tooling plates - High-temperature fixture plates - Process reactor internals - Thermal processing equipment **Other Applications:** - Test and research facility components - Semiconductor processing equipment - Specialized high-temperature structures --- #### **7. International Standards** | Standard Organization | Standard Designation | Description | |----------------------|---------------------|-------------| | **ASTM International** | ASTM B435 | Nickel Alloy 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 Plate | --- #### **8. Plate Specifications & Availability** **Thickness Ranges:** - **Sheet**: 0.5 mm to 5 mm (0.02" to 0.2") - **Plate**: 5 mm to 100 mm (0.2" to 4") - **Heavy Plate**: 100 mm to 200 mm (4" to 8") **Standard Sizes:** - **Widths**: Up to 2000 mm (78") - **Lengths**: Up to 6000 mm (236") - **Custom Sizes**: Available to customer requirements **Surface Conditions:** - Hot rolled, annealed, and descaled - Cold rolled, annealed, and pickled - Ground or machined surfaces - Special surface finishes on request **Tolerances:** - **Thickness**: ±5% standard, ±3% precision - **Flatness**: ≤ 5 mm per meter - **Length/Width**: ±5 mm standard --- #### **9. Heat Treatment** **Standard Plate Heat Treatment:** 1. **Solution Treatment**: 1150°C (2100°F) for 2 hours, air cool 2. **Aging Treatment**: 800°C (1470°F) for 8 hours, air cool **Special Considerations:** - Uniform heating throughout plate thickness - Controlled cooling to prevent distortion - Stress relief after machining operations --- #### **10. Fabrication & Machining** **Machining Guidelines:** - **Optimal Condition**: Solution treated condition - **Tooling**: Carbide tools with positive rake angles - **Cutting Speed**: 15–25 m/min for milling operations - **Feed Rate**: 0.15–0.35 mm/tooth - **Coolant**: Required for heavy machining **Welding Procedures:** - **Preferred Method**: GTAW (TIG) - **Filler Metal**: AWS A5.14 ERNiCrCoMo-1 - **Preheat**: Generally not required - **Post-Weld Heat Treatment**: Generally not required **Forming Operations:** - **Hot Forming**: 1050–1150°C (1920–2100°F) - **Cold Forming**: Possible with adequate radii - **Press Brake Forming**: Suitable for thinner plates - **Roll Forming**: For cylindrical components --- #### **11. Quality Assurance** **Testing & Inspection:** - Ultrasonic testing per ASTM A578 - Liquid penetrant testing per ASTM E165 - Dimensional verification - Surface quality inspection - Flatness measurement **Certification:** - Chemical analysis certification - Mechanical testing reports - Non-destructive testing reports - Heat treatment records - 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 2110 gallon liquid totes Special package is available on request.