Alloy 903,Incoloy 903 Wire,,E FORU

British Specs:，American Specs:，German Specs:

**Product Introduction: Alloy 903 / Incoloy 903 Wire (UNS N19903)** **Overview** Incoloy 903 wire is a premium low thermal expansion superalloy product form that combines the alloy's exceptional dimensional stability with the versatility of wire configuration. This age-hardenable nickel-iron-cobalt alloy wire maintains consistent performance under thermal cycling conditions from cryogenic temperatures up to 500°C (930°F), making it ideal for specialized applications requiring precise dimensional control, high strength, and excellent fatigue resistance in wire form. **Key Characteristics** * **Controlled Low Thermal Expansion Coefficient** * **High Strength in Wire Form** * **Excellent Fatigue and Creep Resistance** * **Good Weldability and Formability** * **Age-Hardenable for Enhanced Properties** * **Maintains Dimensional Stability Under Thermal Cycling** --- **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** | Condition | Tensile Strength | Yield Strength | Elongation | |-----------|------------------|----------------|------------| | Annealed | 690-860 MPa | 480-620 MPa | 20-30% | | Age-Hardened | 1240-1380 MPa | 1030-1170 MPa | 12-18% | --- **Product Applications** * **Aerospace Components** * Wire forms for turbine seal systems * Fastener wire for high-temperature applications * Spring elements for engine controls * Welding wire for component repair * **Industrial Applications** * High-temperature spring manufacturing * Wire mesh for thermal processing * Fastener production for critical applications * Instrumentation and sensing elements * **Nuclear Industry** * Core component fasteners * Instrumentation wire * Specialized spring applications * **Precision Engineering** * Resistance welding electrodes * Thermo-mechanical measurement devices * Specialized electrical components --- **International Standards & Specifications** **ASTM Standards:** - ASTM B166: Standard Specification for Nickel-Chromium-Iron Alloys Rod, Bar, and Wire - ASTM B637: Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock **Aerospace Standards (AMS):** - AMS 5714: Nickel Alloy, Corrosion and Heat Resistant, Wire **International Designations:** - UNS N19903 - W. Nr. 2.4717 **Quality Standards:** - EN 10204 3.1/3.2 Certification - Dimensional compliance with customer specifications --- **Available Forms & Specifications** **Wire Diameter Range:** - Fine Wire: 0.1mm - 1.0mm - Intermediate: 1.0mm - 5.0mm - Heavy Wire: 5.0mm - 12.0mm **Surface Conditions:** - Bright finished - Pickled and cleaned - Special coated (upon request) **Packaging:** - Spools (5kg to 50kg) - Coils (custom sizes) - Straight lengths (up to 4 meters) **Temper Conditions:** - Annealed (soft) - Age-hardened - Custom tempers available --- **Processing & Fabrication** **Heat Treatment:** - Solution Annealing: 980°C ±15°C, rapid cool - Aging Treatment: 720°C/8hr + 620°C/8hr, air cool **Welding Characteristics:** - Suitable for TIG and MIG welding - Matching filler wire available - Post-weld heat treatment recommended **Forming Notes:** - Good cold forming properties in annealed condition - Springback characteristics suitable for spring manufacturing - Can be drawn to fine diameters with proper processing --- **Note**: Incoloy 903 wire is particularly valued for applications requiring both high strength and controlled thermal expansion. The wire can be supplied in various conditions to suit specific manufacturing requirements, with final age-hardening typically performed after fabrication to achieve optimal mechanical properties. **Disclaimer**: The information provided is for reference purposes. Properties may vary based on manufacturing process, heat treatment, and wire diameter. For critical applications, always consult the manufacturer's technical data sheets and conduct appropriate qualification testing. Proper handling and storage are recommended to maintain wire quality.

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 3027 gallon liquid totes Special package is available on request.