Global Steel is a name synonymous with excellence in the steel market as a producer, supplier, stockist, and exporter of superior Duplex S31803 flanges. Duplex S31803 flanges are made of high-grade Duplex Stainless Steel S31803, which is essentially the combination of the desirable qualities of austenitic as well as ferritic stainless steel. https://www.globalsteelindustries.com/duplex-s31803-flanges-manufacturers-suppliers-stockists-exporters.html