We’re exhibiting: Valve World Expo, Düsseldorf, Germany. 29th November – 1st December. Hall 1 Booth #C17. Learn more.

List of Alloys & profiles

List of Alloys & profiles

Alloy Wire International

Datasheet: Super Duplex

Super Duplex

Duplex stainless steels are magnetic and are far more corrosion resistant than more commonly used stainless grades, i.e. 302 and 316. Super Duplex combines aspects of both austenitic and ferritic grades, and is known for its excellent corrosion resistance and high strength.

Super Duplex is also known as Alloy 32750 and SAF 2507.

Available in all profile options

Super Duplex - Alloy Wire International 1

Key Features

Super Duplex offers the following key features:

Excellent resistance to stress corrosion cracking in chloride-bearing environments.
Excellent resistance to pitting and crevice corrosion.
High resistance to general corrosion.

Typical Applications

Super Duplex is known to be suitable for the following applications:

Oil and gas exploration
Marine applications


Designations

W.Nr. 1.4410
UNS S32750
2507
AWS 169

Specifications

ISO 15156-3
(NACE MR 0175)

Chemical Composition

The chemical composition of Super Duplex is indicated in the table below:

ElementMin %Max %
C0.03
Mn1.2
Si0.80
S0.015
P0.035
Cr24.026.0
Ni6.08.0
Mo3.04.5
N0.240.35
Cu0.5
Febal

Alloy Details

Super Duplex density, melting point, coefficient of expansion, modulus of rigidity, and elasticity is indicated in the table below:

DensityMelting PointCoefficient of ExpansionModulus of RigidityModulus of Elasticity
7.8 g/cm³1350°C13.5 μm/m °C (25 – 100 °C)77 kN/mm²200 kN/mm²
0.28 lb/in³2460°F7.5 x 10-6 in/in °F (70 – 200 °F)11000 ksi29000 ksi

Heat treatment of finished parts

The typical heat treatment of Super Duplex:

Condition as supplied by AWITypeTemperatureTimeCooling
Annealed or Spring TemperStress Relieve250 °C (480 °F)1 HrAir

Properties

The typical mechanical properties of Super Duplex:

Annealed
Approx. tensile strength<1100 N/mm²<159 ksi
Approx. operating temperature-200 to +300 °C-330 to +570 °F
Spring Temper
Approx. tensile strength1300 – 1900 N/mm²189 – 276 ksi
Approx. operating temperature-200 to +300 °C-330 to +570 °F

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