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

Birmabright is a trade name of the former Birmetals Co. (Birmabright works in Clapgate Lane, Quinton, Birmingham, UK) for various types of lightweight sheet metal in an alloy of aluminium and magnesium. The constituents are 7% magnesium, sometimes 1% manganese, and the remainder aluminium. The BB2 is one example, of which equivalent specifications...
Found on
http://en.wikipedia.org/wiki/Birmabright
No exact match found.