Semi-finished product
Round electrical copper wire, soft and hard
Round electrical copper wire of grades Cu-ETP and Cu-ETP1 manufactured by TCG. It is used to make the conductors of wires, cables, cords and other electrical products. It is made in two versions: MM (soft – annealed, with higher ductility) and MT (hard – as drawn, with higher strength). Designation breakdown: Cu-ETP – Electrolytic Tough Pitch copper (electrolytic copper), MM – soft copper, MT – hard copper.
Mechanical properties of copper wire per GOST 2112 for the two heat-treatment conditions.
| Type | Condition | ⌀ range, mm | Tensile strength, MPa | Elongation, % |
|---|---|---|---|---|
| MM | Soft, annealed | Over 0.190 to 0.580 | 200 | ≥ 20 |
| MM | Soft, annealed | Over 0.580 to 0.970 | 200 | ≥ 25 |
| MM | Soft, annealed | Over 0.970 to 3.00 | 200 | ≥ 28 |
| MM | Soft, annealed | Over 3.00 to 3.500 | 200 | ≥ 32 |
| MT | Hard, work-hardened | Over 0.970 to 3.00 | 422 | 1.0 |
| MT | Hard, work-hardened | Over 3.00 to 5.00 | 382 | 1.5 |
| MT | Hard, work-hardened | Over 5.00 | 373 | 2.0 |
Round electrical copper wire is a key semi-finished product for cable manufacturing. TCG produces it from its own KMO copper wire rod, made in an UPCAST melting furnace from M00k cathodes (99.99% purity). Quality is controlled at every stage – from copper melting to the finished wire.
Features:
It is used to make the conductors of wires, cables and cords and for other electrical purposes – both by TCG itself for its own cables and as a product supplied to other cable plants.
Raw material
KMO copper wire rod from M00k cathodes (99.99% Cu).
Wire drawing
Gradual reduction of the diameter on a wire-drawing machine through drawing dies. Final diameter from 0.15 to 7 mm.
Heat treatment (for MM)
Annealing in an inert gas atmosphere at 450-500°C. Restores ductility after drawing. The result is MM soft copper.
Without annealing (MT)
The wire remains in the work-hardened condition after drawing. The result is MT hard copper with higher mechanical strength but lower ductility.
Round copper wire cross-section – a solid circle of copper
Full quality certificate – supplied with every batch
Specify the cross-section and quantity and we will prepare a proposal within 1 business day.
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Send us a request and we will prepare a commercial proposal within 1 business day
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