At Instinox, as Duplex tube fittings suppliers and exporters, our Duplex have up to twice the design strength of austenitic and ferritic stainless steels, this is because our Duplex are basically a mixture of approximately equal parts of ferrite and austenite.  All Duplex tube fittings at Instinox manufactured have a pristine resistance to stress corrosion cracking. Duplex have a significantly better toughness and ductility than ferritic grades, but on the flip side, they do not reach the high values of austenitic grades. Some of our recently developed grades of Duplex have nitrogen and manganese composed together to bring the nickel content to very low levels. This has an extremely beneficial effect on price stability. Duplex 2205 tube fittings have lower nickel and molybdenum contents than their austenitic counterparts of similar corrosion resistance. Because of this lower alloying content, Duplex Tube Fittings are one of the most cost-effective tube fittings in the market today. Instinox being Duplex Tube Fittings Supplier provides you with best quality & services