Form: This specification covers a premium aircraft-quality corrosion- ~ resistant steel in the form of bars@ wire@ forgings@ mechanical tubing@ flash welded rings@ and stock for forging@ flash welded rings@ or heading. Application: Primarily for parts requiring corrosion resistance and high strength up to 600??(315??. Certain processing procedures and service conditions may cause these products to become subject to stress-corrosion cracking; ARP 1110 recommends practices to minimize such conditions. For applications@ such as bolting@ where stress-corrosion is a possibility@ the product should be precipitation heat treated for not less ( than 4 hr at the highest temperature compatible with the strength requirements but in no case lower than 1025??(550??. Classification: Product covered by this specification is classified as S1 follows: Type I - Steel multiple melted using vacuum consumable electrode in the final melt. Type II - Steel multiple melted using electroslag process in the final melting. Unless a specific type is ordered@ either type may be supplied.