Copper

Copper in Drawn Bars and Sheets

The main characteristic of copper rod and sheet is their high electrical and thermal conductivity. The main use of these products is in the construction of switchgear, welding, EDM and heat exchange components. Copper rod production is carried out by a continuous casting or extrusion process, with subsequent drawing.

The latter process consists of passing the bars through a steel matrix of calibrated dimensions, so as to give the drawn copper bars a profile with a very narrow dimensional tolerance (see related tables in the technical catalogue).

The production of Copper sheets is carried out by a rolling process of sheets produced in continuous casting. Rolling consists of dragging the material through two rollers with parallel and counter-rotating axes; the space between the two rollers (canal) determines the thickness of the copper sheet.

Copper alloys and characteristics:
Copper used in the electromechanical and sheet metal industry is copper with a minimum purity of over 99.90% (except for special alloys). The two different types of copper used in these sectors are Cu-ETP and Cu-DHP.

The two alloys differ from each other in the presence of other components, in a maximum total percentage of 0.10%, which however, has a significant influence on the technological characteristics.

Copper Cu-ETP (Electrolytic Tough Pitch): this is the material used for the production of copper in bars and copper in sheets for use in the electromechanical sector. This copper is characterised by the presence of Oxygen (O) and the absence of Phosphorus (P), which gives it a high electrical conductivity. This copper is obtained by electrolytic refining and pine-trunk treatment (treatment performed on the liquid metal in order to reduce oxidation).

Copper Cu-DHP (Deoxidised High Residual Phosphorus): is used for the production of copper sheet and tubes. It is a totally oxygen (O)-free copper, in which a relatively high Phosphorus (P) content of between 0.015% and 0.04% is maintained (in order to stabilise and guarantee deoxidation).

The presence of Phosphorus reduces electrical conductivity but improves cold plastic deformability and increases brazing ability, making it particularly suitable for use in the sheet metal sector and in the production of pipes for plumbing systems.

We have a well-stocked warehouse of Copper in round, square, rectangular bars, copper sheets and tubes in various thicknesses, as shown below.

Copper E.T.P.99.9, available in the following sizes:
Round bars from Ø3mm to Ø250mm. in standard lengths of 4’200mm.
Square bars from ≠ 10 x 10 to ≠120 x 120mm. 4200mm.
Rectangular sharp-edged bars (r.0,1mm.) from ≠10 x 2mm to ≠200 x 70mm. 4’200mm.
Rectangular ‘Full Radius’ bars from ≠15 x 3mm to ≠200 x 10mm. 4’200mm.
Hard, half-hard and annealed sheets, available in thicknesses from ≠0.5 to ≠10mm. and dimensions 1’000×2’000mm.
Hard and annealed strip, available on request.
Copper D.H.P.99.9, available in the following dimensions:
Annealed plates with thicknesses from ≠0.5 mm. to ≠3 mm. and sizes 1’000 x 2’000 mm.
Hard plates with thicknesses from ≠0.3mm. to ≠10mm. and sizes 1’000 x 2’000mm.
Hard and annealed strip, available on request.
Annealed pipe in coils with wall thicknesses from ≠0.5mm. to ≠1mm.
Hard pipe in bars, only available on request.
Tellurium copper (Cu Te), available in round bars 3’000mm.
Beryllium Copper Type 1 (CuBe1) and Type 2 (CuBe2), available in round bars 3’000mm.
Chromium Zirconium Copper (CuCrZr), available in round bars 3’000mm.

All copper bars or sheets can be supplied cut to size (see technical catalogue section ‘Services’)

All copper sold by Commerciale Fond is produced by foundries with a certified ‘Quality System’ in compliance with UNI EN ISO 9001-2008.

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Copper

Copper in Drawn Bars and Sheets

We have a well-stocked warehouse of Copper in round, square, rectangular bars, copper sheets and tubes in various thicknesses, as shown below.

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