A

David

Darling

duralumin

Thirty-nine duralumin rings attached to lateral girders formed the lightweight but strong 803-foot-long framework of the Hindenburg

Thirty-nine duralumin rings attached to lateral girders formed the lightweight but strong 803-foot-long framework of the Hindenburg.


Duralumin is an alloy of aluminum with copper, magnesium, and manganese composed within the following limits: aluminum – over 90%; copper – about 4%; magnesium – 0.5% to 1.5%; manganese – less than 1%.