SIGRAFINE® Isostatic graphites R4340

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Description

SIGRAFINE® Isostatic graphite is an ultra-fine grain graphite used for applications where the mechanical properties of other fine grain graphites are inadequate. The term "Isostatic Graphite" stands for isostatically molded graphite. This means that the raw material mixture is compressed into rectangular or round blocks in a so called Cold-Isostatic-Press (CIP). Compared to other technologies such as extrusion or vibration molding, this technology can produce the most isotropic form of artificial graphite. In addition, isostatic graphite generally tends to have the smallest grain sizes of all artificial graphites. Typical properties of the material:


  • Extremely high thermal and chemical resistance
  • Excellent thermal shock resistance
  • High electrical conductivity
  • High thermal conductivity
  • Increasing strength with rising temperature
  • Easy to machine
  • Can be produced with very high purity < 5 ppm
  • Los datos sobre este material han sido proporcionados por SGL Carbon.

    A menos que se indique lo contrario, todas las medidas corresponden a condiciones de temperatura ambiente. A menos que se indique lo contrario, se utilizan las unidades del SI.
    Las normas armonizadas son similares a uno o varios estándares del proveedor. Es posible que algunas normas armonizadas se ajusten al estándar original, mientras que otras pueden quedar fuera de su alcance.

    Ashby charts

    Propiedades

    General

    PropertyTemperatureValueComment

    Coeficiente de permeabilidad

    20 °C

    0.25 cm²/s

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    Densidad aparente

    1.72 g/cm³

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    Porosidad

    15.0 %

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    open porosity

    Tamaño de grano

    15.0 μm

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    Mecánica

    PropertyValueComment

    Hardness, Rockwell

    80.0 [-]

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    10/100

    Módulo elástico

    11 GPa

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    Dynamic Modulus

    Resistencia a la compresión

    90 MPa

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    Resistencia a la flexión

    45 MPa

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    Aplicaciones térmicas

    PropertyTemperatureValueComment

    Coeficiente de dilatación térmica

    3.2e-06 1/K

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    @20-200°C

    Conductividad térmica

    20 °C

    105 W/(m·K)

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    Contenido de cenizas

    0.02 %

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    Technological properties

    Property
    Application areas

    Metallurgical applications e.g. continuous casting, crucibles, sintering molds, etc.

    Processing methods

    Isostatically pressed