# Nickel Wire

*Ni200 / Ni201 / N6 - Annealed temper*

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

| Parameter | Value |
|---|---|
| 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% |

## Technical specifications

## 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.