Aich's metal
/ˈeɪks ˌmɛt(ə)l/(also Aich metal) Now disused
noun
A hard alloy of copper, zinc, and iron, used (especially formerly) in gun-making and marine engineering.
- Aich's metal is typically 60% copper, 38.2% zinc and 1.8% iron..
Origin
Mid 19th century; earliest use found in Chemical News. From the genitive of the name of Johann Aich, Austrian naval officer, who invented the alloy, for which a British patent was subsequently issued (3 Feb. 1860) + metal, after German Aichmetall. In some forms from the name of Johann Aich + metal.