Form: This specification covers a corrosion-resistant steel in the form of investment castings. Application: Primarily for parts requiring good corrosion resistance and strength up to 600? F (315? C). Certain processing procedures and service conditions may cause these castings to become subject to stress-corrosion cracking; ARP 1110 recommends practices to minimize such conditions on wrought products. Where stress-corrosion is considered to be a factor@ precipitation heat treatment should be performed at temperatures not lower than 1000? F (540? C).