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Duplex Wire

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
Si - 1.00
Mn - 2.00
P - 0.035
S - 0.015
Cr 21.00 23.00
Ni 4.50 6.50
Mo 2.50 3.50
N 0.10 0.22
ISO 15156-3
(NACE MR 0175)
W.Nr 1.4462
UNS S31803
2205
AWS 167
Greater corrosion resistance than stainless steel 300 series.
Greater pitting resistance and uniform corrosion resistance to stress corrosion cracking than stainless steel 300 series.
Good weldability.
Chemical processing.
Oil and gas refining.
Marine environments.
Pollution control equipment.
Density 7.8 g/cm³ 0.282 lb/in³
Melting Point 1470°C 2680°F
Coefficient of Expansion 13.7 μm/m °C (21 - 100°C) 7.610 x 10-6 in/in °F (70 - 212°F)
Modulus of Rigidity 76.9 kN/mm² 11154 ksi
Modulus of Elasticity 200 kN/mm² 29008 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
Solution Annealed 700 - 900 102 - 131 -200 to +300 -330 to +570
Spring Temper 1300 - 1900 189 - 276 -200 to +300 -330 to +570

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