Duplex and Super Duplex Pipe
DP
DUPLEX & SUPER DUPLEX STEEL PIPE
Since the microstructures of duplex stainless steels are about 50% austenite and 50% ferrite, duplex
products have the physical attributes of both ferritic and austenitic grades. Duplex stainless steels offer
better resistance to localised corrosion and ar
e resistant to cracking produced by chloride stress corrosion
in austenitic grades. This stainless steel family has about twice the yield strength of their austenitic
counterparts, allowing us to create thinner gauge tubing. For high precision tubes, highe
r hardness values
provide improved wear resistance.
Heat exchanger tubes, umbilical, structural tanks, pulp and paper production equipment, pipes and fittings,
and seawater handling systems are examples of typical applications for this alloy group.
Super
Duplex is more corrosion resistant than regular duplex grades. S32750 has a mixed microstructure
of austenite and ferrite (50/50), which improves strength over ferritic and austenitic steel grades. The key
distinction is that Super Duplex has more molybden
um and chromium than ordinary duplex grades, giving
it more corrosion resistance.
ASTM A790 & ASME SA790
1/4′′ THROUGH 24′′
10S, 20, 40S, 40, 60, 80, 100, 120, 140, 160, STD, XS, XXS
S31803, S32205, S32750, S32760