ASTM A790 UNS S31803, also known as Duplex 2205, is an excellent material for industries requiring high strength, durability, and resistance to corrosive environments. Its unique combination of austenitic and ferritic phases gives it superior corrosion resistance, especially in chloride-rich and sulfide environments. Although it is more expensive than some stainless steel alloys, its performance makes it a cost-effective solution in demanding applications.