Definition
An alloy steel containing chromium and vanadium as its primary alloying elements, valued for its high strength, toughness, fatigue resistance, and ability to hold a hard, sharp edge after heat treatment. It is widely used in aircraft components and hand tools that must withstand repeated stress and shock loading.
Plain English
A type of steel mixed with small amounts of chromium and vanadium to make it stronger, tougher, and more resistant to wear than plain steel.
Context Anchor
Seen in aircraft maintenance and tool descriptions, especially where strong hand tools, springs, or metal parts must resist heavy use.
Derivation
Named for its two key alloying elements: chromium (from Greek 'chroma,' meaning color, named for the bright colors of its compounds) and vanadium (named after Vanadis, a Norse goddess, for the beautiful colors of its compounds). Adding these two metals to steel produces a material that is much stronger and more fatigue-resistant than carbon steel alone.
Why Pilots Care
Critical aircraft hardware such as engine bolts, landing gear springs, and certain structural fasteners are made from chrome vanadium steel because it resists fatigue failure under repeated loads. Substituting a lower-grade fastener in these locations can lead to in-service failure.
Intuition Check
Do not read “chrome” here as shiny decorative plating. Here it means chromium is part of the steel itself, changing the metal’s strength and wear resistance.
Example Sentence 1
The high-strength bolts holding the engine mount are made of chrome vanadium steel and must not be replaced with hardware-store equivalents.
Example Sentence 2
High-stress aircraft control linkages are frequently fabricated from chrome vanadium steel to withstand vibration and cyclic loads.