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4J36 Invar Wire For Thermostatic Applications Fe-Ni Alloy Wire With Controlled Thermal Expansion

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xThermal Expansion (20–100°C) | ~1.0–1.5 × 10⁻⁶ /°C | Density | 8.1 G/cm³ |
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Resistivity | 0.78 μΩ·m | Tensile Strength | ≥ 450 MPa |
Magnetic Properties | Soft Magnetic, Stable Under Thermal Cycling | Diameter | 0.02 Mm – 3.0 Mm |
Highlight | Bright 4J36 Invar Wire,4J36 Invar Wire For Thermostatic,Bright nickel alloy wire |
4J36 Invar Wire for Thermostatic Applications | Fe-Ni Alloy Wire with Controlled Thermal Expansion
Product Overview
4J36 alloy wire, commonly known as Invar 36 wire, is a precision Fe-Ni alloy with an extremely low coefficient of thermal expansion (CTE). It contains approximately 36% nickel and is widely used in applications requiring dimensional stability across temperature changes, such as precision instruments, aerospace components, and electronic devices.
Material Composition
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Nickel (Ni): ~36%
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Iron (Fe): Balance
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Others: Trace amounts of Mn, Si, C, etc.
Thermal Expansion (20–100°C): ~1.0–1.5 × 10⁻⁶ /°C
Density: ~8.1 g/cm³
Resistivity: ~0.78 μΩ·m
Tensile Strength: ≥ 450 MPa
Magnetic Properties: Soft magnetic, stable under thermal cycling
Available Sizes
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Diameter: 0.02 mm – 3.0 mm
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Length: coil, spool, or cut-to-length as needed
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Surface: Bright, smooth, oxide-free
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Condition: Annealed or cold drawn
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Custom dimensions accepted
Key Features
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Extremely low thermal expansion
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Excellent dimensional stability
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Easy to weld and process
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High purity and oxidation resistance
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Vacuum compatible for sealed applications
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Custom packaging available
Applications
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Aerospace and satellite components
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Bimetallic thermostats and precision instruments
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Optical mounts and sensor elements
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Electronic device sealing and packaging
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Laser and infrared systems
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Measuring tools and calibration equipment
Packaging & Shipping
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Vacuum packaging, spools, or anti-rust film
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Air, sea, or express delivery available
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Lead time: 7–15 working days