Ni200 / Ni201 / N6 - Annealed temper
Nickel Wire
0.025mm finest draw — 17 reduction passes from 8mm rod through tungsten carbide dies, laser micrometer on every pass. ±0.003mm tolerance on wire ≤0.1mm. The Ni200 vs Ni201 decision matters more than anything else in your lead wire spec. Ni200 (0.15% C max): fine below 80°C, where carbide precipitation stays undetectable for 40,000+ hours. Use it for bus-bar connections that never touch electrolyte. Ni201 (0.02% C max): mandatory for any wire immersed in KOH above 80°C. The carbon difference determines whether your leads last 40,000 or 60,000+ hours — we've sectioned failed Ni200 leads from a 42,000h teardown and mapped grain-boundary corrosion networks under SEM. Ni201 doesn't have the carbon to fuel that reaction. Temper: annealed (≥30% elongation), quarter-hard, hard-drawn. Surface: bright annealed, oxidized (~8% cheaper), or as-drawn. 3kg spools to 250kg drums. ASTM B162, EN 10204 3.1 cert shipped with every order.
Technical specifications
Rev. 2026-Q3 - lot-certified per ASTM E8 and EN 10204 3.1
| Alloy grades | Ni200 (UNS N02200), Ni201 (UNS N02201), N6 (Chinese GB) |
|---|---|
| Applicable standards | ASTM B162, ASTM B160, GB/T 5235 |
| Diameter range | 0.025 - 8.0 (custom diameters within range) mm |
| Tolerance - fine wire | Plus/minus 0.003 (diameter ≤0.1 mm) mm |
| Tolerance - standard | Plus/minus 0.01 (diameter ≤1.0 mm) mm |
| Temper | Annealed (min 30% elongation) / 1/4-hard / hard-drawn |
| Tensile strength | 380 - 690 MPa (annealed temper) |
| Elongation | Min 30% (annealed) - suitable for forming, crimping, welding |
| Conductivity | 14 - 18 % IACS (International Annealed Copper Standard) |
| Surface finish | Bright annealed, oxidized, or as-drawn |
| Packaging | Spools, coils, bobbins, or drum-pack per customer requirement |
| Ni200 composition | Ni min 99.5%, C max 0.15%, Fe max 0.40% |
| Ni201 composition | Ni min 99.0%, C max 0.02%, Fe max 0.40% |
Related products
Need Ni200 vs Ni201 selection guidance?
The 0.13% carbon difference between Ni200 and Ni201 is the critical variable for electrolyzer lead wire lifetime. Our technical bulletin includes grain-boundary carbide precipitation data and application-specific grade recommendations for your operating temperature and KOH concentration.
What is Nickel Wire?
Nickel wire is a pure-nickel drawn conductor used as the current collector lead wire that connects electrode elements to the busbar in alkaline electrolyzer and chlor-alkali cells. RAS draws it from 8 mm rod through tungsten carbide dies over 17 reduction passes, with a laser micrometer on every pass, down to 0.025 mm at ±0.003 mm tolerance. Ni201 grade (0.02% C max, annealed, min 30% elongation) is mandatory for any wire immersed in KOH above 80°C, where lead lifetime exceeds 60,000 hours; Ni200 serves ambient busbar connections.
Key facts
Diameter range
0.025-8.0 mm, custom diameters within range
Tolerance
±0.003 mm fine wire (≤0.1 mm), ±0.01 mm standard
Conductivity
14-18% IACS
Packaging
3 kg spools to 250 kg drums, coils, bobbins
Related products & resources
Selection guide
The table below compares the options most often quoted for nickel wire enquiries.
| Grade | Composition | Typical service |
|---|---|---|
| Ni200 (UNS N02200) | Ni min 99.5%, C max 0.15%, Fe max 0.40% | Ambient busbar connections; duty below 80°C |
| Ni201 (UNS N02201) | Ni min 99.0%, C max 0.02%, Fe max 0.40% | KOH-immersed lead wire above 80°C |
| N6 (Chinese GB) | Min 99.5% Ni+Co per GB/T 5235 | PRC supply chain equivalent |
How to request a quote
- Step 1
Send your specification — product family, grade (Ni200/Ni201/N6), mesh count or packing density, wire diameter, quantity and certification standard.
- Step 2
Our applications team reviews the requirement and replies within one business day — within 24 hours on working days — with availability, lead time and pricing.
- Step 3
Confirm the proforma invoice; a sample Mill Test Certificate (EN 10204 3.1) is included with the quote, and a free 100×100 mm sample is available for standard mesh specifications.
- Step 4
Production, inspection and shipment proceed with the full documentation package — 100% of shipments include the lot-specific MTC.
Certification & traceability
Manufacturing is ISO 9001:2015 certified, and 100% of shipments include an EN 10204 3.1 Mill Test Certificate — OES chemistry, laser micrometer wire trace, optical mesh count and ASTM E8 tensile results — with a traceable heat number on every roll. Technical enquiries receive a substantive reply from a named materials engineer within one business day (within 24 hours on working days), and a sample MTC is included with every quote so your quality team can verify the documentation format up front.
Standards & references
ASTM International · International Organization for Standardization
Page last updated: 2026-09-28
Frequently Asked Questions (FAQ)
Which nickel wire grade should I use for electrolyzer lead wires?
Ni201 annealed (minimum 30% elongation) is mandatory for any wire immersed in KOH above 80°C - its 0.02% C max prevents grain-boundary carbide precipitation and intergranular corrosion. Ni200 is acceptable for bus-bar connections that never touch electrolyte.
What diameters and tolerances can you draw nickel wire to?
0.025-8.0 mm, drawn from 8 mm rod through tungsten carbide dies with a laser micrometer on every pass. Tolerance is ±0.003 mm on wire up to 0.1 mm diameter and ±0.01 mm up to 1.0 mm.
What temper and surface finish options are available?
Annealed (minimum 30% elongation, suitable for forming, crimping and welding), quarter-hard, or hard-drawn. Surface finishes: bright annealed, oxidized (about 8% cheaper), or as-drawn.
How is nickel wire packaged and certified?
3 kg spools up to 250 kg drums, plus coils and bobbins per customer requirement. Every order ships with an EN 10204 3.1 certificate per ASTM B162, with tensile lot-certified per ASTM E8.