Definition
A metal that contains no iron, or only trace amounts. Common nonferrous metals used in aircraft construction include aluminum, magnesium, copper, titanium, and their alloys.
Plain English
A metal that has no iron in it. Aluminum and titanium are good examples — both widely used in aircraft because they are strong without being heavy.
Context Anchor
Seen in aircraft maintenance, materials, corrosion, and structural repair discussions.
Derivation
From the Latin ferrum, meaning iron, plus the prefix non-, meaning not. So nonferrous literally means not containing iron.
Why Pilots Care
Nonferrous metals reduce aircraft weight and minimize corrosion risk compared with steel, directly affecting structural integrity and maintenance intervals.
Intuition Check
Do not assume nonferrous simply means “not magnetic.” Some iron-based metals are not strongly magnetic, and some nonferrous metals can react to magnets. The key point is whether the metal is based on iron.
Example Sentence 1
The aircraft's skin is made from a nonferrous metal — an aluminum alloy — to keep the structure light.
Example Sentence 2
Many engine parts are made from nonferrous metals because they withstand high temperatures while remaining lightweight.