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 | |||||||||
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
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