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Semi-finished contact pre-materials can be manufactured from solid precious
metals, precious metal alloys, or precious metal containing composite materials.
liquid or vapor phase.
===3.2.1 Clad Semi-Finished Pre-Materials (Contact-Bimetals)===
Clad materials consist of two or more layers of different materials, the contact
material and the carrier, which are firmly bonded to each other. Depending on
strip edge.
===3.2.2 Brazed Semi-Finished Contact Materials (Toplay–Profiles)===
The toplay process starts with a flat or profile – shaped contact material strip
which is fed together with the wider non-precious carrier material and in most
from the standards DIN EN 1652 and DIN EN 1654 for Cu alloys.
===3.2.3 Seam–Welded Contact Strip Materials (FDR–Profiles)===
Seam–welding is the process by which the contact material in the form of a solid
wire, narrow clad strip, or profile is attached to the carrier strip by overlapping or
standards DIN EN 1652 and DIN EN 1654 for Cu alloys..
===3.2.4 Contact Profiles (Contact Weld Tapes)===
Contact profiles span a broad range of dimensions. Width and thickness are typically
between 0.8 – 8.0 mm and 0.2 – 3.0 mm resp. Special configurations, often defined
