Steel can be up to three times stronger than aluminium, although it is also heavier and therefore applications must be chosen carefully. Its strength, hardness and resistance to heat make it particularly suitable for use on the skin surface of the aircraft and in the landing gear where extremes of temperature and variation in load are common. The durability of steel is probably its most important characteristic, and thus the material is commonly used for hinges, cable and fasteners. Steel typically comprises around 11-13% of the materials used in an aircraft.
Aerospace-grade precipitation hardening stainless steel.
Aerospace-grade precipitation hardening stainless steel.
Martensitic stainless steel that is the aerospace standard similar to 431 stainless steel.
A precipitation hardenable chromium-nickel-molybdenum martensitic stainless grade.
Martensitic precipitation hardening stainless steel with 17% chromium and 4% nickel.
An austenitic 18/9 chromium-nickel stainless steelin the British Standard Aerospace series of alloys.
A martensitic precipitation hardening chromium-nickel-copper stainless steel.
A high strength low alloy steel.
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