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    Hexoloy® SA SiC Material

    Hexoloy SA grade material pore magnification | Saint-Gobain Performance Ceramics & RefractoriesHexoloy® SA SiC is a pressureless, sintered form of alpha silicon carbide, with a density greater than 98 percent theoretical. It has a very fine grain structure (4 - 10 microns) for excellent wear resistance and contains no free silicon, which makes it highly chemically resistant in both oxidizing and reducing environments,  

    Photomicrograph of Hexoloy® SA Silicon Carbide's typical appearance of pores when magnified.


    Specifications

    Hexoloy® SA SiC Material Properties


    Property Units Typical Values
    Composition* - SiC
    Grain Size µm 4 - 10
    Density g / cm3 3.10
    Hardness (Knoop)** kg / mm2 2800
    Flexural Strength 4pt @ RT*** MPa
    x103 lb / in2
    380
    55
    Flexural Strength 3 pt @ RT*** MPa
    x103 lb / in2
    550
    80
    Compressive Strength @ RT MPa
    x103 lb / in2
    3900
    560
    Modulus of Elasticity @ RT GPa
    x106 lb / in2
    410
    59
    Weibull Modulus (2 parameter)   8
    Poisson Ratio   0.14
    Fracture Toughness @ RT
    Double Torsion & SENB
    MPa x m1/2
    x103 lb / in2 x in1/2
    4.60
    4.20
    Coefficient of Thermal Expansion
    RT to 700°C
    x10-6 mm / mmK
    x10-6 in / in °F
    4.02
    2.20
    Maximum Service Temp.
    Air
    °C
    °F
    1900
    3450
    Mean Specific Heat @ RT J / gmK 0.67
    Thermal Conductivity @ RT

    @ 200° C

    @ 400° C
    W / mK
    Btu / ft h °F
    W / m°K
    Btu / ft h °F
    w / m°K
    Btu / ft h°F
    125.6
    72.6
    102.6
    59.3
    77.5
    44.8
    Permeability @ RT to 1000°C Impervious to gases over 31 MPa
    Electrical Resistivity @ RT****
    @ 1000°C
    ohm-cm
    ohm-cm
    102 - 1011
    0.01 - 0.2
    Emissivity   0.9
    * Composition code: Si = free silicon metal; C = free graphite; SiC = silicon carbide

    ** Knoop 0.1 kg load

    *** Test bar size: 3 x 4 x 45 mm (0.118" x 0.157" x 1.772")

    **** Dependent upon dopants in Hexoloy Sa SiC which will decrease electrical resistivity

     

    Related Documents

     Hexoloy® SA Silicon Carbide (Technical Data Sheet)
     Hexoloy® SE SiC Material (Technical Data Sheet)
     Hexoloy® Enhanced SA SiC (Technical Data Sheet)
     Hexoloy® SP SiC (Technical Data Sheet)
     Hexoloy® SG SiC Material (Technical Data Sheet)
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