The alloy used in the Land Rover was Birmabright which is 7% magnesium, sometimes 1% manganese and aluminum.[1] Without the maganese this would be a series 5 a

The alloy used in the Land Rover was Birmabright which is 7% magnesium, sometimes 1% manganese and aluminum.[1] Without the maganese this would be a series 5 aluminum according to the alloy grade comparison I found.[2] 1. http://en.wikipedia.org/wiki/Birmabright#cite_note-Camm.2C_Birmabright-1 http://en.wikipedia.org/wiki/Birmabright#cite_note-Camm.2C_B... 2. http://www.practicalmachinist.com/vb/general/aluminium-alloy-grades-171343/ http://www.practicalmachinist.com/vb/general/aluminium-alloy...