ČSN 423001 (Cu-ETP) is an electrolytic copper with very high purity and excellent electrical and thermal conductivity. It contains a minimal amount of oxygen (approx. 0.02–0.04%), which ensures good mechanical properties and high conductivity, but limits its weldability. It is one of the most used types of copper in electrical engineering and energy.
Alternative designations : E-Cu58, CW004A (EN), Electrolytic Tough Pitch Copper
Type : Technically pure copper (electrolytic, drawn)
Features:
Very high electrical conductivity (≥ 58 MS/m, ~100% IACS)
High thermal conductivity
Good ductility and formability
Good corrosion resistance in common environments
Poor weldability due to oxygen content (hydrogen disease of copper)
Heat treatment:
Available soft (annealed) or semi-hard/hard (formed)
Annealing option to restore ductility: 200–400 °C
Cu-ETP / ČSN 423001
Electrolytic copper
Chemical composition (approximate) :
Copper: ≥ 99.90%
O: 0.02–0.04% (dissolved oxygen)
Use:
Electrodes for electrical discharge machining
Electrical wires, cables, coil and transformer windings
Busbars, terminals, contacts and connectors
Thermally conductive components (coolers, exchangers)
Structural components requiring high conductivity
Round bars, rolled, annealed
3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 |
20 | 25 | 30 | 35 | 40 | 50 | 60 | 70 | 80 | 90 |
100 | 110 | 120 | |||||||
Flat bars, rolled, annealed
10 | 16 | 20 | 25 | 32 | |||||||
Rolled, annealed sheets
10 | 15 | 20 | 25 | 30 | 40 | 50 | 60 | 70 | 80 |
100 | |||||||||