Duplex Steel UNS S31803 tubes combine higher mechanical strength with excellent corrosion resistance, therefore gaining significant attention from a variety of industries. This is of a class of duplex stainless steels that obtain this unique combination of austenite and ferrite in their microstructure. A special dual-phase composition alloy that imparts to the Duplex Steel UNS S31803 ... https://www.pratikpipefittings.com/duplex-steel-s31803-tubes-manufacturer-exporter-supplier-stockist.html