Alloy 903,Incoloy 903 Forgings,,E FORU

British Specs:，American Specs:，German Specs:

**Product Introduction: Alloy 903 / Incoloy 903 Forgings (UNS N19903)** **Overview** Incoloy 903 forgings represent the premium product form of this low thermal expansion superalloy, offering superior mechanical properties and structural integrity through controlled thermomechanical processing. The forging process enhances the alloy's inherent characteristics by refining the grain structure and improving directional strength properties, making it the preferred choice for the most demanding high-temperature applications where dimensional stability and reliability are paramount. **Key Characteristics** * **Optimized Grain Structure** through controlled forging process * **Enhanced Mechanical Properties** in specific orientations * **Superior Structural Integrity** with minimal internal defects * **Controlled Low Coefficient of Thermal Expansion** * **Excellent High-Temperature Strength** and creep resistance * **Age-Hardenable** for maximum performance --- **Chemical Composition (Weight %)** | Element | Content (%) | |---------|-------------| | Nickel (Ni) | 36.0 - 39.0 | | Iron (Fe) | Balance | | Cobalt (Co) | 14.0 - 17.0 | | Niobium (Nb) + Tantalum (Ta) | 2.90 - 3.50 | | Titanium (Ti) | 1.35 - 1.75 | | Aluminum (Al) | 0.70 - 1.15 | | Silicon (Si) | ≤ 0.30 | | Manganese (Mn) | ≤ 0.20 | | Carbon (C) | ≤ 0.05 | | Sulfur (S) | ≤ 0.015 | | Boron (B) | ≤ 0.012 | --- **Physical Properties** | Property | Value | |----------|-------| | Density | 8.25 g/cm³ (0.298 lb/in³) | | Melting Range | 1370-1425°C (2500-2600°F) | | Mean Coefficient of Thermal Expansion | 8.5 × 10⁻⁶/°C (20-400°C) | | Thermal Conductivity | 11.5 W/m·K (at 100°C) | | Specific Heat | 440 J/kg·K (at 20°C) | | Modulus of Elasticity | 148 GPa (21.5 × 10⁶ psi) | --- **Mechanical Properties (Age-Hardened Condition)** | Property | Value | |----------|-------------| | Tensile Strength | 1275-1450 MPa (185-210 ksi) | | Yield Strength (0.2% Offset) | 1035-1240 MPa (150-180 ksi) | | Elongation | 10-15% | | Reduction of Area | 15-25% | | Hardness | 37-43 HRC | --- **Product Applications** * **Aerospace Components**: Turbine shafts, engine mounts, landing gear components * **Power Generation**: Turbine disks, compressor wheels, rotor shafts * **Nuclear Industry**: Reactor core components, control rod mechanisms * **Automotive Systems**: Turbocharger turbines, high-temperature fasteners * **Industrial Equipment**: High-temperature valves, pump shafts, compressor parts * **Defense Applications**: Missile components, radar system parts * **Research Equipment**: High-stress cryogenic components --- **International Standards & Specifications** * **ASTM Standards**: - ASTM B637: Standard Specification for Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock for High-Temperature Service * **Aerospace Materials Specifications**: - AMS 5916: Ring, Sealing, Low Thermal Expansion, Vacuum Melted, Solution and Precipitation Heat Treated * **ASME Standards**: - ASME SB-637: Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock * **International Designations**: - UNS N19903 - W. Nr. 2.4717 * **Forging Types Available**: - **Open Die Forgings**: Custom shapes and large components - **Closed Die Forgings**: Precision near-net shapes - **Ring Rolled Forgings**: Circular and annular components - **Press Forgings**: High-volume production parts * **Quality Assurance Requirements**: - Ultrasonic testing per ASTM A388 - Macroetch examination - Grain flow verification - Heat treatment compliance certification - Full traceability documentation --- **Manufacturing Process** Incoloy 903 forgings are produced using carefully controlled processes: - **Billet Conditioning**: Premium quality vacuum melted stock - **Heating**: Precise temperature control during forging operations - **Forging Operations**: Controlled deformation to achieve optimal grain flow - **Heat Treatment**: Solution annealing followed by age hardening - **Quality Verification**: Comprehensive NDT and mechanical testing **Heat Treatment Cycle**: 1. Solution Anneal: 980°C ±15°C, rapid cool 2. Aging Treatment: 720°C for 8 hours, furnace cool to 620°C for 8 hours, air cool --- **Note**: Incoloy 903 forgings offer superior performance characteristics compared to cast or wrought products due to the refined microstructure achieved through controlled deformation processes. The forging orientation should be considered in design to maximize mechanical properties in critical stress directions. **Disclaimer**: The information provided is for reference purposes. Actual properties may vary based on forging size, shape, and specific heat treatment parameters. For critical applications, consult the forging manufacturer's technical data and conduct appropriate qualification testing.

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 3024 gallon liquid totes Special package is available on request.