
1) Aluminium-magnesium alloy
Found on
https://www.crosswordclues.com/clue/hydronalium

Hydronalium is a family of aluminium-magnesium alloys. It is an alloy predominantly of aluminium, with between 1%-12% of magnesium as the primary alloying ingredient. It also includes a secondary addition of manganese, usually between 0.4%-1%. The Hydronalium alloys originated in Germany in the 1930s and are best known, at least by that name, in E...
Found on
http://en.wikipedia.org/wiki/Hydronalium
No exact match found.