Form This specification covers a corrosion-resistant steel in the form of investment castings. Application These castings have been used typically for parts requiring good corrosion resistance and strength up to 600 ??(316 ??@ but usage is not limited to such applications (See 8.4). Certain processing procedures and service conditions may cause these castings to become subject to stress-corrosion cracking; ARP1110 recommends practices to minimize such conditions.