superduplex en · ADJ
Etymology
From super- + duplex.
Meanings
-
(not-comparable) Of stainless steel: having a duplex structure (containing austenite and ferrite in roughly equal proportions) and also having unusually high hardness, strength or corrosion resistance.
Tungsten reinforces the effect of Mo, so that superduplex steel X2CrNiMoCuWN25-7-4 with 0.25% N, 0.8% W and 0.8% Cu reaches PREN > 40.
2008, Hans Berns, Werner Theisen, translated by Gillian Scheibelein, Ferrous Materials: Steel and Cast Iron, Berlin; London: Springer, →ISBN, page 324: