CuW70 · 70% Tungsten
W/Cu 70/30 Electrode Wheels
Higher conductivity for heavy-current welding
Tungsten 70% ±2%, balance copper · No MOQ · Lead time 10–14 days
Overview
Made by infiltration, finished by machining
When your seam-welding schedule demands more current, the 70/30 grade moves heat faster: roughly 25% higher electrical conductivity than 75/25, at the cost of some erosion life. Many customers stock both grades and switch by weld schedule.
Same production route — infiltration, sintering, finish machining — and the same tolerance package: OD 0/+0.5 mm, bore H7, runout 0.02 mm. Supplied with a batch traceability record on request.
Material values shown are typical for the grade. Per-batch composition, density and hardness reports are provided on request — see quality control.
| Composition | W 70% ±2%, Cu balance (CuW70) |
| Density | ≈ 14.5 g/cm³ (typical) |
| Hardness | ≈ 175 HB (typical) |
| Electrical conductivity | ≈ 42% IACS (typical) |
| Max dimensions | OD 400 mm × thickness 100 mm |
| Tolerances | OD 0/+0.5 mm · thickness ±0.1 mm · bore H7 · runout 0.02 mm |
| Edge profiles | Flat · single/double bevel · R profile · knurled |
| Lead time | 10–14 days standard · 20–25 days custom |
| MOQ | None for standard sizes |
Typical applications
- Heavy-current seam welding
- Welding of coated and high-resistivity steels
- Projection welding fixtures
- General resistance-welding consumables
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Best seller CuW75 · 75% Tungsten
W/Cu 75/25 Electrode Wheels
The workhorse alloy for seam-welding wheels
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Stock shapes CuW75 / CuW70
Electrode Rods & Blocks
Stock shapes machined from infiltration bar
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To drawing CuW75 / CuW70
Threaded Electrodes
Precision-threaded welding consumables
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Need W/Cu 70/30 on a drawing?
Send alloy, dimensions and quantity — quote back within 24 hours.