Duplex Steel 2205 is the most widely used duplex (ferrite/austenitic) stainless steel grade. It finds applications due to both excellent corrosion resistance and high strength. The standard S31803 composition has over the years been refined by many steel suppliers, and the resulting restricted composition range was endorsed as UNS S32205 in 1996. S32205 gives better guaranteed corrosion resistance, but much of the S31803 currently produced also complies with S32205. Excellent general corrosion resistance; superior to Grade 316 in most environments. Excellent resistance to localized corrosion including inter granular, pitting and crevice corrosion; the CPT of Duplex Steel 2205 is generally at least 35°C. The grade is also resistant to chloride stress corrosion cracking (SCC) at temperatures of up to about 150°C. The ductility of 2205 is less than that of an austenitic grade, so severe forming operations, such as cold heading, are not generally possible. If severe cold working is required it is recommended that intermediate annealing be carried out.