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Sanicro 61: High-Temperature Nickel-Chromium Alloy for Corrosion Resistance

Sanicro® 61 is a nickel-chromium alloy characterized by:


  • Good strength at high temperatures
  • Excellent resistance to high temperature corrosion, particularly in oxidizing conditions


    • The alloy is suitable for a wide range of applications where resistance to both heat and corrosion is a requirement.


    Datasheet URL:

    Sanicro® 61


    Datasheet updated 2020-05-13 08:48 (supersedes all previous editions)

    Properties

    General

    PropertyTemperatureValue

    Density

    23.0 °C

    8.1 g/cm³

    Mechanical

    PropertyTemperatureValueComment

    Elastic modulus

    20.0 °C

    207 GPa

    Annealed condition

    100.0 °C

    202 GPa

    Annealed condition

    200.0 °C

    197 GPa

    Annealed condition

    300.0 °C

    191 GPa

    Annealed condition

    400.0 °C

    185 GPa

    Annealed condition

    500.0 °C

    178 GPa

    Annealed condition

    600.0 °C

    170 GPa

    Annealed condition

    700.0 °C

    161 GPa

    Annealed condition

    800.0 °C

    150 GPa

    Annealed condition

    900.0 °C

    138 GPa

    Annealed condition

    1000.0 °C

    125 GPa

    Annealed condition

    Elongation A2

    23.0 °C

    30 %

    min.

    Tensile strength

    23.0 °C

    550 - 760 MPa

    Yield strength Rp0.2

    23.0 °C

    205 MPa

    min.

    Thermal

    PropertyTemperatureValueComment

    Coefficient of thermal expansion

    100.0 °C

    1.38E-5 1/K

    for 30°C to the mentioned temperature

    200.0 °C

    1.44E-5 1/K

    for 30°C to the mentioned temperature

    300.0 °C

    1.46E-5 1/K

    for 30°C to the mentioned temperature

    400.0 °C

    1.48E-5 1/K

    for 30°C to the mentioned temperature

    500.0 °C

    1.52E-5 1/K

    for 30°C to the mentioned temperature

    600.0 °C

    1.56E-5 1/K

    for 30°C to the mentioned temperature

    700.0 °C

    1.61E-5 1/K

    for 30°C to the mentioned temperature

    800.0 °C

    1.67E-5 1/K

    for 30°C to the mentioned temperature

    900.0 °C

    1.72E-5 1/K

    for 30°C to the mentioned temperature

    1000.0 °C

    1.78E-5 1/K

    for 30°C to the mentioned temperature

    Specific heat capacity

    20.0 °C

    448 J/(kg·K)

    100.0 °C

    469 J/(kg·K)

    200.0 °C

    498 J/(kg·K)

    300.0 °C

    523 J/(kg·K)

    400.0 °C

    548 J/(kg·K)

    500.0 °C

    578 J/(kg·K)

    600.0 °C

    603 J/(kg·K)

    700.0 °C

    632 J/(kg·K)

    800.0 °C

    657 J/(kg·K)

    900.0 °C

    686 J/(kg·K)

    1000.0 °C

    712 J/(kg·K)

    Thermal conductivity

    20.0 °C

    11.2 W/(m·K)

    100.0 °C

    12.7 W/(m·K)

    200.0 °C

    14.3 W/(m·K)

    300.0 °C

    16 W/(m·K)

    400.0 °C

    17.7 W/(m·K)

    500.0 °C

    19.5 W/(m·K)

    600.0 °C

    21 W/(m·K)

    700.0 °C

    22.8 W/(m·K)

    800.0 °C

    24.4 W/(m·K)

    900.0 °C

    26.1 W/(m·K)

    1000.0 °C

    27.8 W/(m·K)

    Electrical

    PropertyTemperatureValue

    Electrical resistivity

    20.0 °C

    1.18E-6 Ω·m

    100.0 °C

    1.19E-6 Ω·m

    200.0 °C

    1.21E-6 Ω·m

    300.0 °C

    1.22E-6 Ω·m

    400.0 °C

    1.23E-6 Ω·m

    500.0 °C

    1.24E-6 Ω·m

    600.0 °C

    1.25E-6 Ω·m

    700.0 °C

    1.25E-6 Ω·m

    800.0 °C

    1.25E-6 Ω·m

    900.0 °C

    1.26E-6 Ω·m

    1000.0 °C

    1.26E-6 Ω·m

    Chemical properties

    PropertyValueComment

    Aluminium

    1.3 %

    Carbon

    0.03 %

    Chromium

    23 %

    Iron

    Balance

    Manganese

    0.6 %

    Nickel

    60 %

    Phosphorus

    0.03 %

    max.

    Silicon

    0.3 %

    Sulfur

    0.015 %

    max.

    Technological properties

    Property
    Application areas

    Sanicro® 61 is a general-purpose, highly corrosion resistant alloy suitable for a wide range of high temperature applications such as:

  • Muffle tubing
  • Recuperators
  • Superheaters
  • Thermocouple protection tubes

    • Corrosion properties

    Sanicro® 61 has superior resistance to, in particular, oxidation at high temperatures up to 1200°C (2200°F). The grade also offers excellent resistance to oxide scaling under cyclic thermal conditions, largely owing to the addition of aluminium.

    Other

    Forms of supply:

    Sanicro® 61 seamless nickel alloy tubing is supplied bright annealed in the outside diameter range 27.67-48.3 mm (0.75-1.5 in. nominal) and wall-thickness range 2.0-4.0 mm (0.079-0.160 in.).


    Tolerances

  • Size (OD, mm ): 26.67-48.3, Tolerances: +0.4/-0.8, Wall thickness(%): +/-10

    • Welding

    The weldability of Sanicro® 61 is good. Suitable methods of fusion welding are manual metal-arc welding (MMA/SMAW) and gas-shielded arc welding, with the TIG/GTAW method as first choice.

    For Sanicro® 61, heat-input of <1.2 kJ/mm and interpass temperature of <100°C (210°F) are recommended. A string bead welding technique should be used.


    Recommended filler metals:

    • TIG/GTAW or MIG/GMAW welding
      • ISO 18274 S Ni 6601/AWS A5.14 ERNiCrFe-11
      • ISO 18274 S Ni 6617/AWS A5.14 ERNiCrCoMo-1 (e.g. Exaton Ni53)
    • MMA/SMAW welding
      • ISO 14172 E Ni 6117/AWS A5.11 ENiCrCoMo-1


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