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Super Duplex
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Super Duplex

Available in any of the 'profile options'

Duplex stainless steels are magnetic and are far more corrosion resistant than more commonly used stainless grades, ie 302 and 316.

Chemical Composition Specifications Designations Key Features Typical Applications
Element Min % Max %
C 0.03
Mn 1.2
Si 0.80
S 0.015
P 0.035
Cr 24.0 26.0
Ni 6.0 8.0
Mo 3.0 4.5
N 0.24 0.35
Cu 0.5
Fe bal
ISO 15156-3
(NACE MR 0175)
W.Nr. 1.4410
UNS S32750
2507
AWS 169
Excellent resistance to stress corrosion cracking in chloride-bearing environments
Excellent resistance to pitting and crevice corrosion
High resistance to general corrosion
Oil and gas exploration
Marine applications
Density 7.8 g/cm³ 0.28 lb/in³
Melting Point 1350°C 2460°F
Coefficient of Expansion 13.5 μm/m °C (25 – 100°C) 7.5 x 10-6 in/in °F (70 – 200°F)
Modulus of Rigidity 77 kN/mm² 11000 ksi
Modulus of Elasticity 200 kN/mm² 29000 ksi
Heat Treatment of Finished Parts
Condition as supplied by Alloy Wire Type Temperature Time (Hr) Cooling
°C °F
Annealed or Spring Temper Stress Relieve 250 480 1 Air
Properties
Condition Approx. tensile strength Approx. operating temperature
N/mm² ksi °C °F
Annealed 700 – 900 102 – 131 -200 to +300 -330 to +570
Spring Temper 1300 – 1900 189 – 276 -200 to +300 -330 to +570

The above tensile strength ranges are typical. If you require different please ask.

 

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