High Purity Nickel Wire (Ni200 / Ni201 / N4 / N6)

Product Introduction

Nickel Spooled Wire is available in purities from 99% (2N) to 99.99% (4N) in annealed, stress-relieved, as-drawn, and hard tempers, combining the metal’s good corrosion resistance, magnetic properties, and mechanical versatility in a continuous coil format suited to automated processing and high-volume component manufacture. Nickel is ferromagnetic below its Curie temperature of 358 °C — the highest Curie point of any commercially pure metallic element — and its face-centered cubic structure gives it good ductility and cold-drawing performance across the full purity range. In the annealed and stress-relieved conditions it is well suited to wound resistance heating elements, filter mesh, and electroformed components; as-drawn and hard tempers provide the spring-back and mechanical stiffness needed for precision coil springs, cathode heaters in vacuum tubes, and shaped electrode wire. Its good resistance to corrosion by caustic alkalis makes it a reliable material for chemical processing components in alkaline environments, and its electrochemical stability supports use in battery electrode fabrication and electroplating anodes.

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Specifications

Material Grades：N4, N6, Ni200 (UNS N02200), Ni201 (UNS N02201)

Purity：99.0% - 99.99% (High purity reduces resistance fluctuation)

Diameter Range：0.01mm - 10mm (Custom ultra-fine and standard sizes available)

Tempers/Conditions：Hard, Half-hard, Soft (Annealed)

Forms：Spool wire, Straight wire, Coil wire, Cut lengths

Manufacturing Standards：GB/T 5235-2021, ASTM B160 / B162 / B366

Physical & Chemical Properties

Density：8.9 g/cm³

Melting Point：1455 °C

Electrical Conductivity：14.3 × 10⁶ S/m

Thermal Conductivity：91 W/m·K

Key Features：High temperature strength, low electrical resistivity, excellent ductility, good weldability, and stable linear expansion coefficient.

Grade Selection Guide

N4 / Ni200：Carbon content ≤ 0.15%. Good mechanical strength and heat resistance. Suitable for vacuum devices and strong alkali filter nets. Warning: Do not use in the 315°C - 600°C range to avoid high-temperature graphitization and embrittlement.

N6 / Ni201：Low carbon content ≤ 0.02%. Superior corrosion resistance in strong alkalis, neutral, and weak acidic media. Recommended for high-temperature applications above 300°C and chemical equipment manufacturing.

Applications

Vacuum & Electronic Devices：Electron gun electrodes, heating elements, evaporation sources, anodes, spacers, and electrode brackets.

Chemical & Metallurgy：Filter nets for chlor-alkali industry, electrolytic electrodes, and corrosion-resistant equipment.

Lighting Industry：Lead wires and lamp foot pins for incandescent bulbs.

New Energy & Batteries：Battery tab connections (Ni-MH/Ni-Cd), sealing parts for battery poles.

Aerospace & Instruments：Thermocouple protective sleeves, precision instrument springs, and high-temperature anti-oxidation gaskets.

Manufacturing & Quality Control

Production Process：Vacuum Induction Melting / Electron Beam Melting → Hot Rolling/Forging → Cold Drawing → Annealing → Surface Cleaning/Polishing.

Surface Finish：Silver-gray, Bright, Oxide-free.

Quality Assurance：ISO9001 certified. Every batch is accompanied by a Mill Test Certificate (MTC) verifying purity and dimensional tolerances. RoHS & REACH compliant.

Packaging & Delivery

Packaging：Vacuum-sealed and anti-oxidation packaging. Shipped on plastic/wooden spools or in wooden cases to prevent moisture and physical damage.

Lead Time：Standard sizes in stock; Custom orders typically take 3-7 days or 2-3 weeks depending on specifications.

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