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S32760 / SEACOL-760 Duplex Stainless Steel

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Description

1.4501 (X2CrNiMoCuWN25-7-4) is a grade of super-duplex based on 25% chromium, 7% nickel with an addition of tungsten which enhances the pitting index (PREN) even further above the 40 minimum and also contributes to alloy strength. This high resistance to pitting is combined with a high tensile strength and higher resistance to stress corrosion cracking at moderate temperatures to that of conventional austenitic stainless steels. A small addition of copper (lower than in S32550/AMAZON 256) enhances its general corrosion resistance. It shows the following features and properties:


  • Very high strength
  • Very high resistance to pitting
  • Very good corrosion resistance
  • High resistance to erosion and abrasion in flowing systems
  • High resistance to stress corrosion cracking, fatigue and erosion
  • Related Standards

    Equivalent Materials

    This material data has been provided by Matmatch.

    All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
    Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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    Properties

    General

    PropertyValueTemperature

    Density

    7.8 g/cm³

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    23.0 °C

    Mechanical

    PropertyValueTemperatureComment

    Elastic modulus

    199 GPa

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    23.0 °C

    Elongation

    25 %

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    23.0 °C

    Hardness, Brinell

    270 [-]

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    23.0 °C

    max.

    Poisson's ratio

    0.32 [-]

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    23.0 °C

    Shear modulus

    75 GPa

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    23.0 °C

    Tensile strength

    750 MPa

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    23.0 °C

    Yield strength Rp0.2

    550 MPa

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    23.0 °C

    Thermal

    PropertyValueTemperatureComment

    Coefficient of thermal expansion

    1.11E-5 1/K

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    23.0 °C

    for 20-100°C

    Specific heat capacity

    425 J/(kg·K)

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    23.0 °C

    Thermal conductivity

    14 W/(m·K)

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    23.0 °C

    for 20-300°C

    Electrical

    PropertyValueTemperature

    Electrical resistivity

    8E-7 Ω·m

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    23.0 °C

    Magnetic

    PropertyValueTemperature

    Relative magnetic permeability

    33 [-]

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    23.0 °C

    Chemical properties

    Property

    Carbon

    0.03 %

    max.

    Chromium

    24 - 26 %

    Copper

    0.5 - 1 %

    Iron

    Balance

    Manganese

    1 %

    max.

    Molybdenum

    3 - 4 %

    Nickel

    6 - 8 %

    Nitrogen

    0.2 - 0.3 %

    Phosphorus

    0.03 %

    max.

    Silicon

    1 %

    max.

    Sulfur

    0.01 %

    max.

    Tungsten

    0.5 - 1 %

    Technological properties

    Property
    Application areas

    Offshore & marine: Offshore platforms, components for gas, oil and process cooling plants, instrumentation, wellhead and subsea wellhead fittings, desalination plants, seawater cooled heat exchangers, cargo heating systems, marine shafts (for boats etc) and high strength fasteners;Chemical processing: Equipment handling organic or dilute sulphuric acid, process solutions contaminated with chlorides, refinery equipment, desulphurising and distillation units, sewage plant components, fire extinguishing systems, general processing and mixing plant

    Corrosion properties

    Very good corrosion resistance