Because the environment of aerospace and aviation is harsh, and the external medium is even more corrosive, stainless steel materials are widely used in aerospace and aviation industries.

The vast majority of aircraft parts are made of stainless steel. 

In the aerospace industry, austenitic stainless steel 06Cr18Ni9, 12Cr17Ni7, 06Cr18NillNb, 06Cr18Nilon, 06Cr21Ni6Mn9N, etc. 

can be used for large liquid launch vehicles, high-strength low-temperature pressure vessels and low-pressure fluid vessels; in the aviation industry, hardened stainless steel is widely used in the mechanical system of aircraft Such as 04Cr13N18M02AI, 05Cr15Ni5CuNb, 05Cr17Ni4Cu4Nb, AM350, A-286, etc., XB-70 large aircraft wing trusses use 05Cr15Ni5CuNb steel. 

Austenitic stainless steels such as 20Cr13Mn9Ni4 and 06Cr19NilONbN can be used in aero-engine exhaust manifolds, branch pipes, and hot air pipes of turbo compressors. 

Duplex stainless steel instead of 12Cr18Ni9Ti austenitic stainless steel.