Sanmac 2205 is a machinability-improved version of the duplex (austenitic-ferritic) stainless steel Sandvik SAF 2205. The grade is characterized by:

• Excellent machinability

• High resistance to stress corrosion cracking (SCC) in chloride-bearing environments

• High resistance to stress corrosion cracking (SCC) in environments containing hydrogen sulphide

• High resistance to general corrosion, pitting and crevice corrosion

• High mechanical strength - roughly twice the proof strength of austenitic stainless steels

• Good hot-working properties

• High resistance to erosion corrosion and corrosion fatigue

• Physical properties that offer design advantages

• Good weldability

Applications
Due to its excellent corrosion properties, Sanmac 2205 is a highly suitable material for service in environments containing chlorides and hydrogen sulphide. The material is suitable for use in production tubing and flowlines for the extraction of oil and gas from sour wells, in refineries and in process solutions contaminated with chlorides. Sanmac 2205 is particularly suitable for heat exchangers where chloride-bearing water or brackish water is used as a cooling medium. The steel is also suitable for use in dilute sulphuric acid solutions and for the handling of organic acids, e.g. acetic acid and mixtures.