A high-purity copper wire harness system carries current from the battery throughout a vehicle to equipment such as lights, central locking, onboard computers and satellite navigation systems. Electric motors, which are wound with high conductivity wire, are also used in many vehicles. The average car contains about 1 km of wire.
Yes, the mechanical properties are identical. Take care if you braze the tubes, use an oxidising flame.
Electroplated nickel silver.
No, it is recommended that they are solution treated at 850–920°C, then bent to shape and finally aged at 420 to 470°C.
CW707R (CZ 126).
Copper, like other metals, is made up of millions of tiny grains. In the case of copper that is to be worked, these range in size from 0.01 to 0.1mm. The grain size is particularly important where copper is to be fabricated by cold working – generally the smallest grain size that can be economically fabricated into a desired component is used.
Use an acidic dip such as a mixture of citric and phosphoric acids. This is quite gentle and with care easy to use.
These are the engineering standards prepared for material for use by the Ministry of Defence. They have replaced NES (Naval Engineering Standards), which in their turn replaced DGS (Directorate General Ships) standards.
Copper chromium (CC101) – conductivity is 80% IACS – strength good up to 400°C.
Copper sheet is available in pre-patinated form. As well as green, other attractive colours such as brown, gold and silver are available. See www.kme.com and www.aurubis.co.uk.
It reduces by about 3%.
Suggest DEF STAN 02-834, which is a naval grade of aluminium bronze with a low magnetic permeability. This meets MOD requirements.