This specification covers a premium aircraft-quality, corrosion and heat resistant steel in the form of bars, wire, forgings, mechanical tubing, flash welded rings, and stock for forging or flash welded rings.

These products have been used typically for pressure vessels or structural parts requiring uniformly high room-temperature tensile properties with oxidation resistance up to 1000 \mDF (538 \mDC), where control of ferrite is necessary, but usage is not limited to such applications.

Certain design and processing procedures may cause these products to become susceptible to stress-corrosion cracking; ARP1110 recommends practices to minimize such conditions.