Maass Global Group


Duplex / Super Duplex

  • ASME / ASTMGerman Grade No.ASTM / UNS
  • A182-F51/F601.4462S31803/S32205
  • A182-F531.4410S32750
  • A182-F551.4501S32760
  • A182-F44/6Mo1.4547S31254
  • AL-6XN N08367

Duplex grades have a ferritic-austenitic microstructure, with a phase balance of approximately 50% ferrite and 50% austenite. Duplex grades combine many of the beneficial properties of ferritic and austenitic stainless steels. The duplex microstructure contributes to the high strength and high resistance to stress corrosion cracking.

Other characteristic properties of duplex grades include good abrasion and erosion resistance, good fatigue resistance, high-energy absorption and low thermal expansion.