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Ultra-Fine N4 0.03mm Pure Nickel Filament for Sensor Elements
Explore ultra-fine 0.03mm (30 micron) N4 pure nickel wire and filament with ≥99.9% purity. Optimized for precision temperature sensors, magnetic probes, and vacuum electronic components. Global factory-direct supply, custom spooling, and ISO-certified quality.
- Overview
- Specifications
- Technical Parameters and Material Properties
- Applications
- FAQ
- Recommended Products
Product Brief Introduction
Engineered specifically for high-reliability sensor manufacturing
this 0.03mm (30 μm) N4 pure nickel filament delivers exceptional metallurgical purity (≥99.9% Ni), tight dimensional tolerance, and superior electrical-thermal stability. Manufactured under strict vacuum melting and precision diamond drawing processes, it provides consistent Temperature Coefficient of Resistance (TCR), high oxidation resistance up to 600°C, and uniform tensile strength for critical sensor core elements, micro-heaters, and precision electronic instrumentation.
Product Overview
High-purity N4 nickel filament (equivalent to commercial pure nickel grade Ni200 / UNS N02200) in ultra-fine 0.03mm diameter represents an essential functional material in modern sensing and micro-electromechanical systems (MEMS). At 30 microns, sensor designers require zero surface defects, uniform electrical resistivity, and stable physical properties to guarantee linear signal output across demanding thermal and chemical environments.
DLX Alloy produces high-grade N4 nickel wire utilizing high-purity electrolytic nickel cathode raw materials, vacuum induction melting (VIM), continuous micro-drawing, and protective atmosphere bright annealing. The resulting filament exhibits an ultra-clean bright surface, consistent mechanical ductility (elongation ≥15%), and stable electrical resistivity (~0.096 μΩ·m at 20°C). Whether utilized in resistance temperature detectors (RTD), thermal mass flow meters, hydrogen sensing probes, or vacuum tube grid structures, our N4 0.03mm pure nickel filament ensures repeatable batch-to-batch performance and long service life.
Key Features and Technical Specifications
- High Chemical Purity: Total Nickel plus Cobalt content ≥99.9% with strictly controlled trace carbon, sulfur, and iron impurities to prevent grain boundary embrittlement and electrical drift.
- Ultra-Fine Dimensional Uniformity: Precision diamond die drawing maintains 0.03mm diameter with ±0.001mm tolerance and excellent roundness for automated micro-winding and spot welding.
- Linear Temperature Coefficient of Resistance: Stable TCR curve (~0.0067/°C between 0°C and 100°C) provides predictable resistance change for precision thermal instrumentation.
- Smooth Surface Finish: Annealed in pure hydrogen or cracked ammonia atmosphere to eliminate surface oxide scale, micro-cracks, and drawing lubricant residue.
- Excellent Micro-Weldability and Solderability: Compatible with laser micro-welding, ultrasonic bonding, and lead attachment techniques used in sensor packaging.
Technical Parameters and Material Properties
| Parameter Category | Technical Specification | Standard Reference / Test Condition |
|---|---|---|
| Material Grade | N4 (Pure Nickel / UNS N02200 equivalent) | GB/T 21653-2008 / Industrial Quality Standard |
| Nickel Content (Ni + Co) | ≥99.90% | Chemical Spectroscopy |
| Wire Diameter | 0.030 mm (30 μm / 0.0012 inch) | Optical Micrometer (Tolerance ±0.001 mm) |
| Density | 8.89 g/cm³ | Room Temperature (20°C) |
| Melting Point | 1435 - 1446 °C | Solidus / Liquidus Point |
| Curie Temperature | 358 °C | Ferromagnetic Transition |
| Electrical Resistivity | ~0.096 μΩ·m (9.6 μΩ·cm) | At 20°C |
| Temperature Coefficient of Resistance (TCR) | 6.0 - 6.7 × 10⁻³/°C | Range 0°C to 100°C |
| Delivery State | Bright Annealed (Soft / M Temper) | Hydrogen Atmosphere Furnace |
| Tensile Strength (Rm) | ≥420 MPa | GB/T 21653-2008 Mechanical Test |
| Elongation (A100) | ≥15% | Standard Gauge Length |
| Annealed Hardness | 90 - 120 HB | Baseline Standard |
| Spool Packaging | DIN100, DIN125, or custom micro-spools | Anti-static vacuum sealed with desiccant |
| Minimum Order Quantity (MOQ) | 5 kg (Standard) / 0.5 kg (Sample qualification) | Factory Direct |
| Production Capacity | 1,200 metric tons / month (Alloy portfolio) | ISO 9001 / IATF 16949 Certified Facility |
Industrial Sensor and Electronic Applications
- Precision RTD Temperature Sensing: Core sensing coil wire for thin-film and wire-wound resistance thermometers operating from -50°C to +300°C.
- Thermal Gas and Flow Sensors: Hot-wire anemometers, micro-calorimetric gas detectors, and thermal conductivity analyzers requiring rapid thermal response and high corrosion resistance.
- Micro-Heating Elements and Igniters: Low-power miniature heating filaments in medical analytical devices, vaporizers, and laboratory analytical equipment.
- Magnetic Field and Current Probes: Sensitive core coils utilizing nickel's ferromagnetic transition and high saturation magnetization.
- Vacuum Electronic and Optical Devices: Grids, filament supports, and lead wires in vacuum tubes, analytical mass spectrometers, and cathode-ray assemblies.
- Semiconductor and MEMS Interconnects: Ultra-fine bonding wire and lead frames requiring oxidation resistance and low contact resistance.
Frequently Asked Questions
Q1: Why is N4 grade pure nickel preferred over lower purity nickel for sensor core elements?
A1: Sensor applications rely on exact and reproducible electrical resistance curves. N4 grade pure nickel maintains ≥99.9% nickel purity with minimal interstitial impurities (such as carbon, sulfur, and silicon). These controlled purity levels eliminate baseline electrical noise, prevent resistance drift over thermal cycles, and provide a stable, linear Temperature Coefficient of Resistance (TCR).
Q2: What diameter tolerances and spool options are provided for 0.03mm ultra-fine nickel filament?
A2: Our 0.03mm (30 μm) N4 nickel filament is produced with a standard tolerance of ±0.001mm. It is wound with uniform tension on precision spools (such as DIN100 or DIN125) under cleanroom conditions, ensuring smooth payoff during high-speed automated micro-winding without wire snagging, kink formation, or tension breakage.
Q3: What is the delivery temper and mechanical performance of this 0.03mm nickel wire?
A3: The standard delivery condition is bright annealed (M temper), yielding a tensile strength of ≥420 MPa in accordance with GB/T 21653-2008 specifications, with an elongation of ≥15%. This provides the optimal balance of ductility and mechanical integrity for winding small-radius sensor coils and micro-spot welding.
Q4: How does N4 pure nickel perform in corrosive or high-temperature sensor operating environments?
A4: N4 pure nickel forms a tenacious, protective nickel oxide (NiO) surface layer at elevated temperatures, providing oxidation resistance up to 600°C in continuous operation. Furthermore, it demonstrates outstanding resistance to dry gases, reducing atmospheres, and caustic alkalis, making it suitable for industrial gas sensing and chemical process monitoring.
Q5: What are the sample policy, minimum order quantities, and custom packaging capabilities?
A5: For engineering testing and prototype validation, trial sample spools of 0.5 kg are available. Standard production batch MOQ is 5 kg. Custom spool specifications, anti-static vacuum packaging, and dedicated batch mill test certificates (MTC per EN 10204 3.1) with chemical and mechanical test data are provided with each shipment.
