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AS­TM A2­76 Grade S31000

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Description

1.4841 (X15CrNiSi25-21) is an austenitic heat-resisting stainless steel. It is noted for excellent resistance to scaling in continuous service up to 1150°C, and in intermittent heating/cooling conditions up to 1095°C. This grade is highly resistant to oxidising acids and most common corrosive agents, and in marine conditions it shows little evidence of chloride stress corrosion cracking, outperforming lower alloy grades such as 304 and 316. In particular it has good resistance to hot corrosion in many environments including molten salts. It shows the following features and properties:


  • Oxidation resistance to 1150°C
  • Excellent corrosion resistance
  • High strength
  • Strength and toughness at sub-zero temperatures
  • Related Standards

    Equivalent Materials

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    Properties

    General

    Density

    ρ

    7.9 - 8.2 g/cm³ at 20 °C

    Typical for Austenitic Stainless Steel

    Mechanical

    Elastic modulus

    E

    195 GPa at 20 °C

    Show Austenitic Stainless Steel materials with Elastic modulus of 195 GPa at 20 °C

    Typical for Austenitic Stainless Steel

    Elongation

    A

    40 % at 20 °C

    Show Austenitic Stainless Steel materials with Elongation of 40 % at 20 °C

    Poisson's ratio

    ν

    0.3 [-] at 20 °C

    Show Austenitic Stainless Steel materials with Poisson's ratio of 0.3 [-] at 20 °C

    Typical for Austenitic Stainless Steel

    Shear modulus

    G

    77 GPa at 20 °C

    Show Austenitic Stainless Steel materials with Shear modulus of 77 GPa at 20 °C

    Typical for Austenitic Stainless Steel

    Tensile strength

    Rm

    510 MPa at 20 °C

    Show Austenitic Stainless Steel materials with Tensile strength of 510 MPa at 20 °C

    Yield strength

    YS

    205 MPa at 20 °C

    Show Austenitic Stainless Steel materials with Yield strength of 205 MPa at 20 °C

    Thermal

    Coefficient of thermal expansion

    α

    1.7E-5 - 1.9E-5 1/K at 20 °C

    Typical for Austenitic Stainless Steel

    Melting point

    Tm

    1375 - 1450 °C

    Typical for Austenitic Stainless Steel

    Specific heat capacity

    cp

    440 J/(kg·K) at 20 °C

    Typical for Austenitic Stainless Steel

    Thermal conductivity

    λ

    11 - 21 W/(m·K) at 20 °C

    Typical for Austenitic Stainless Steel

    Electrical

    Electrical resistivity

    ρel

    8.5E-7 Ω·m at 20 °C

    Typical for Austenitic Stainless Steel

    Chemical properties

    Element

    Weight %

    Comment

    Fe

    -

    Balance

    Cr

    25 %

    Ni

    20 %

    Technological properties

    Application areas

    Aerospace: Aircraft and jet engine components;Chemical processing: Chemical plant and equipment, fasteners for elevated temperature work, mufflers, heat exchangers and components for high temperature sulphur-bearing environments;Other: Oven linings, boiler baffles, kilns, lead pots, radiant tubes, annealing covers, burners, combustion tubes, refractory anchor bolts, fire box sheets, furnace components and other high temperature containers

    Corrosion properties

    Excellent corrosion resistance

    This material data has been provided by Columbia Metals.

    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.