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S31803 / COLDUPLEX Duplex Stainless Steel

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Description

1.4462 (X2CrNiMoN22-5-3) is the basic grade of duplex stainless steel based on a 22% chromium and 5% nickel content. It is suitable for applications which involve high mechanical stresses and severe corrosion conditions, particularly where there is frequent contact with high levels of chlorides, carbon dioxide and hydrogen sulphide as may be encountered in the gas, petrochemical and offshore industries. Columbia Metals stocks S31803 in the solution treated and quenched condition. It shows the following features and properties:


  • High strength levels
  • Very good resistance to pitting and crevice corrosion
  • High resistance to stress corrosion cracking, fatigue and erosion
  • Excellent resistance to chloride stress corrosion cracking
  • Good workability and weldability
  • Related Standards

    Equivalent Materials

    This material data has been provided by Matmatch.

    "Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
    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

    PropertyTemperatureValue

    Density

    23.0 °C

    7.8 g/cm³

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    Mechanical

    PropertyTemperatureValueComment

    Elastic modulus

    23.0 °C

    199 GPa

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    Elongation

    23.0 °C

    25 %

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    Hardness, Brinell

    23.0 °C

    270 [-]

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    max.

    Poisson's ratio

    23.0 °C

    0.32 [-]

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    Shear modulus

    23.0 °C

    75 GPa

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    Tensile strength

    23.0 °C

    620 MPa

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    Yield strength Rp0.2

    23.0 °C

    448 MPa

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    Thermal

    PropertyTemperatureValueComment

    Coefficient of thermal expansion

    23.0 °C

    1.11E-5 1/K

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    for 20-100°C

    Specific heat capacity

    23.0 °C

    425 J/(kg·K)

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    Thermal conductivity

    23.0 °C

    14 W/(m·K)

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    for 20-300°C

    Electrical

    PropertyTemperatureValue

    Electrical resistivity

    23.0 °C

    8E-7 Ω·m

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    Magnetic

    PropertyTemperatureValue

    Relative magnetic permeability

    23.0 °C

    33 [-]

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    Chemical properties

    PropertyValueComment

    Carbon

    0.03 %

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    max.

    Chromium

    21 - 23 %

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    Iron

    Balance

    Manganese

    2 %

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    max.

    Molybdenum

    2.5 - 3.5 %

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    Nickel

    4.5 - 6.5 %

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    Nitrogen

    0.08 - 0.2 %

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    Phosphorus

    0.02 %

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    max.

    Silicon

    1 %

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    max.

    Sulfur

    0.02 %

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    max.

    Technological properties

    Property
    Application areas

    Offshore & marine: Offshore pipework, components for gas, oil and process cooling plants, wellhead and subsea wellhead fittings, desalination plant, seawater cooled heat exchangers and high strength fasteners;Chemical processing: Chemical tanks, flue gas filters, acetic acid distillation parts and heat exchangers

    Corrosion properties

    Very good corrosion resistance

    General machinability

    Good workability