also: ジェラルミン
duralumin
A strong, lightweight aluminum alloy used in aircraft, structural parts, and some consumer goods.
ジュラルミンは航空機の部品によく使われる。
Duralumin is often used for aircraft parts.
アルミニウム is the pure metal, while ジュラルミン is a stronger alloy made mainly of aluminum, copper, and magnesium.
super duralumin
Standard katakana spelling for this loanword.
Less common variant spelling.
From English 'duralumin', a trademarked aluminum alloy name.