Magnimat
Magnimat is the brand name of an alloy or a metal composite system that has been manufactured by ThyssenKrupp VDM GmbH , a subsidiary of ThyssenKrupp AG , since 1969 .
Magnimat is a three-layer material. A copper-nickel alloy consisting of 75% copper and 25% nickel is roll-clad onto a nickel core from both sides . The name is derived from magnetic material . Variants are identified by a number (e.g. Magnimat 7 ), which indicates the percentage of the nickel core in the total mass of the coin.
This material is mainly used in the manufacture of coins . Modern machines usually not only check the authenticity of a coin on the basis of its size and weight, but also use the magnetic properties as a criterion.
The alloy has been used so far z. B. with the euro coins , the German 2 and 5 DM pieces and as the center of the Austrian bimetallic 50 Schilling coins. After the silver price had risen sharply in 1978 due to the silver speculation by the Hunt brothers , the 5 DM commemorative coins were converted from a 625/1000 silver alloy to Magnimat. The Otto Hahn coin was followed by 14 further Magnimat 5 DM commemorative coins by 1986.