Pure copper electrodes used to be the standard in resistance welding.

They still are — in shops that haven't done the math yet.

Here's the problem with pure copper electrodes:

They soften under heat. Fast. After just a few thousand welds, the tip deforms, contact area grows, current density drops, and weld quality becomes inconsistent. You're either stopping to re-dress the tip, or scrapping parts.

C18150 Chrome Zirconium Copper fixes all of this.

The numbers tell the story:

Conductivity: ~85% IACS — nearly as conductive as pure copper 

Hardness: HRB 70–80 (vs ~40 for pure copper) 

Softening Temperature: 500°C+ (pure copper softens around 200°C) 

Electrode Life: 3–5× longer between dressing cycles

That gap in softening temperature is the key. In resistance spot welding, the electrode tip reaches 300–400°C on every cycle. Pure copper gives up at that temperature. C18150 doesn't even flinch.

The result: more consistent welds, less downtime, lower cost per weld over the electrode's full life.

Beyond welding, C18150 also shows up in: → Injection mold cores (fast heat transfer + no deformation) → High-current electrical contacts → Spot welding guns for automotive body shops

If you're still specifying pure copper for your welding electrodes, the upgrade math is simple — and it works in your favor every time.

We supply C18150 Chrome Zirconium Copper in rod, plate, and custom-cut forms. Factory direct, ASTM compliant, global shipping.

Are you using CuCrZr alloys in your welding or mold applications? What's your biggest challenge with electrode life?