BJS Company Ltd
Copper Datasheet
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Cu 63.54

Colour

Pink
Coefficient of Linear Expansion @ 298.15K 17 x 10-6 K-1
Density 8.94 gcm-3
Electrical Resistivity @ 298.15K 1.712 x 10-8 W m
Heat Capacity 0.385 J g-1 K-1
Melting Point 1083 oC
Tensile Strength, annealed 206.8 Mpa
Thermal Conductivity @ 298.2K 401 W cm-1 K-1

Copper is the most extensively used metal in electrodeposition with an estimated world-wide consumption of 85,000 tonnes per annum of which 80,000 tonnes is electroformed foil consumed in the manufacture of printed circuit board laminate.

Copper is described as a soft, pink, ductile metal with high thermal and electrical conductivity. It has limited use as a decorative coating but is widely used as a base coat for further plating finishes e.g. chromium plated zinc based die castings and as an electronic screening material.

The original electroforms produced between 1840 and 1900 were mainly artifacts and printing plates (known as "electrotypes"). The artifacts were generally reproductions for museum and notable collections in a bid to preserve the designs for posterity and as educational tools. Although a limited number of copper electroforms are still produced today for the same reasons, the predominant use of copper electroforms is in the manufacture of a wide range of industrial products including spark erosion electrodes, wave guides and cavities for microwave devices as well as tools for producing protective gloves and musical instrument components.

The range of applications is increasing rapidly, particularly for short and medium production runs, due to the major advantage of low tooling costs.

BJS COMPANY LTD
65 BIDEFORD AVENUE 
PERIVALE GREENFORD
MIDDLESEX UB6 7PP ENGLAND

Telephone +44 (0)20 8810 5779  
Fax +44 (0)20 8810 5883