Wire rod production
Melted and continuously cast into copper wire rod, the feedstock for cable and winding wire drawing.
Electrolytic copper cathode manufactured in accordance with ASTM B115, with a minimum copper content of 99.994% and ultra-low impurity levels. Supplied as 100 × 100 cm sheets, 8 mm thick, in bundles of 17 sheets.

Electrolytic copper cathode is the refined sheet that feeds wire rod mills, conductor producers and alloy foundries. Atso Tek supplies it to ASTM B115 requirements with a minimum copper content of 99.994% and a published limit for each impurity, so your QC team can check the sheet against the specification before the first melt.
Copper is a minimum; every other element is a maximum, in parts per million. Manufactured in accordance with ASTM B115.
| Element | Symbol | Limit | Unit |
|---|---|---|---|
| Copper | Cu | ≥ 99.994 | % |
| Arsenic | As | < 1 | ppm |
| Antimony | Sb | < 1 | ppm |
| Iron | Fe | < 2 | ppm |
| Manganese | Mn | < 0.5 | ppm |
| Sulfur | S | < 15 | ppm |
| Oxygen | O | < 50 | ppm |
| Lead | Pb | < 5 | ppm |
| Zinc | Zn | < 3 | ppm |
| Cobalt | Co | < 2 | ppm |
| Nickel | Ni | < 1 | ppm |
| Cadmium | Cd | < 0.2 | ppm |
| Tellurium | Te | < 1.2 | ppm |
| Selenium | Se | < 0.4 | ppm |
| Tin | Sn | < 1 | ppm |
| Bismuth | Bi | < 1 | ppm |
| Silicon | Si | < 1 | ppm |
| Phosphorus | P | < 1 | ppm |
| Chromium | Cr | < 1 | ppm |
| Silver | Ag | < 10 | ppm |
Note: Source: Atso Tek technical data sheet, Electrolytic Copper Cathode (Cu 99.994% min).
Download technical data sheet (PDF)Suitable for wire rod production, electrical conductors, copper alloys, electronics and other high-purity industrial applications.
Melted and continuously cast into copper wire rod, the feedstock for cable and winding wire drawing.
Busbar, cable and winding wire, where conductivity depends on keeping impurities low.
A clean base metal for brass, bronze and other copper alloys, so the alloy chemistry stays predictable.
Feedstock for the high-purity copper products used across electronics manufacturing.
Every copper cathode shipment ships with the paperwork you need to clear customs and pass incoming inspection.
Standard specification for electrolytic copper cathode
Copper content and 19 impurity elements against published limits
Minimum 99.994% copper, manufactured in accordance with ASTM B115. Each impurity has its own published maximum, for example sulfur below 15 ppm, oxygen below 50 ppm, silver below 10 ppm and lead below 5 ppm. The full 20-element table is on this page and in the technical data sheet.
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