Alloy 903,Incoloy 903 Strip,,E FORU

British Specs:，American Specs:，German Specs:

**Product Introduction: Alloy 903 / Incoloy 903 Strip (UNS N19903)** **Overview** Incoloy 903 strip is a low thermal expansion superalloy supplied in thin, precision-rolled strip form, specifically engineered for applications requiring exceptional dimensional stability under thermal cycling conditions. This nickel-iron-cobalt age-hardenable alloy maintains consistent dimensions across a wide temperature range while providing high strength and excellent fatigue resistance. The strip form offers superior surface quality and precise dimensional tolerances, making it ideal for manufacturing high-precision components where controlled thermal expansion is critical. **Key Characteristics** * **Controlled Low Coefficient of Thermal Expansion (CTE)** * **High Strength in Thin Sections** * **Excellent Fatigue and Creep Resistance** * **Superior Surface Finish and Dimensional Accuracy** * **Age-Hardenable for Enhanced Mechanical Properties** * **Excellent Formability and Stamping Characteristics** --- **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) | | Electrical Resistivity | 1.05 μΩ·m | | Modulus of Elasticity | 148 GPa (21.5 × 10⁶ psi) | --- **Mechanical Properties (Age-Hardened Condition)** | Property | Value | |----------|-------------| | Tensile Strength | 1240-1450 MPa (180-210 ksi) | | Yield Strength (0.2% Offset) | 1030-1240 MPa (150-180 ksi) | | Elongation | 10-15% | | Hardness | 38-44 HRC | --- **Product Applications** * **Aerospace Components**: Precision seals, spacer rings, and thin-walled engine components * **Electronic Industry**: Lead frames, connector components, and semiconductor packaging * **Precision Instruments**: Spring elements, sensing diaphragms, and optical mounting strips * **Automotive Systems**: Turbocharger seals and high-temperature sensor components * **Medical Devices**: Surgical instrument components and implantable device parts * **Telecommunications**: RF components and waveguide assemblies * **Research Equipment**: Cryogenic instrument components and vacuum system parts --- **International Standards & Specifications** * **ASTM Standards**: - ASTM B625: Standard Specification for UNS N08904, N08354, and N09904 Plate, Sheet, and Strip * **Aerospace Materials Specifications**: - AMS 5916: Ring, Sealing, Low Thermal Expansion, Vacuum Melted, Solution and Precipitation Heat Treated * **International Designations**: - UNS N19903 - W. Nr. 2.4717 * **Available Strip Specifications**: - **Thickness**: 0.05mm to 2.0mm - **Width**: 2mm to 600mm - **Tolerance**: ±0.005mm (thickness), ±0.1mm (width) - **Surface Finish**: Bright annealed, cold rolled, or polished - **Temper**: Solution annealed, 1/4 hard, 1/2 hard, full hard * **Heat Treatment**: - Solution Annealing: 980°C ±15°C, rapid cool - Aging Treatment: 720°C for 8 hours, furnace cool to 620°C for 8 hours, air cool --- **Note**: Incoloy 903 strip is typically supplied in the solution-annealed condition for optimum formability, allowing for deep drawing, stamping, and bending operations. The material can be supplied in various tempers to meet specific application requirements. Final age-hardening is performed after all fabrication operations to achieve maximum mechanical properties. Special attention to surface protection during processing is recommended to maintain the high-quality surface finish. **Disclaimer**: The information provided is for reference purposes. Properties may vary based on manufacturing process, heat treatment, and strip dimensions. For critical applications, always consult the manufacturer's technical data sheets and complete material certifications. Proper material selection should be verified through appropriate engineering analysis and 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 3022 gallon liquid totes Special package is available on request.