1. Specialty Seal Group (SSG) ceramic-to-metal and glass-to-metal seals give top performance in the harshest environments.

    Whether you need industrial heaters, power cables, or other high heat or power sources to operate with maximum efficiency, SSG has a custom or standard solution that’s ideal.

    All SSG seals are vacuum-tight and offer the necessary resistance to heat, abrasion, chemicals, oil, grease, moisture, toxic fumes and more.

    We attach metals to seals through a variety of brazing and soldering techniques which we use based on your specific application.

    Ceramic to metal seal

  2. Specialty Seals

    Producing Assemblies for Special Applications Design

    Speciality Hermetic Seals

    Besides designing and manufacturing high-volume hermetic seals, we can also produce assemblies for special applications, including:

    • Capacitors
    • Filters
    • Transformers
    • Microwave tubes
    • Nuclear reactors
    • Space probe devices
    Speciality Hermetic Seal

    Materials we use include:

    • High Alumina (insulator)
    • Metal Components
      • OFHC or Te Copper
      • Grade A nickel
      • Low carbon steel
      • Ni-Fe alloy
      • Others required for special applications

    The characteristics of our assemblies include:

    • Vacuum-tight
    • High chemical stability
    • High abrasion resistance
    • High mechanical strength
    • Pressures over 10,000 PSI
    • High temperature usage
    • Low dielectric loss
    Physical #9095 #9297
    Tensile Strength PSI 18,500 28,500
    Compression Strength PSI 280,000 350,000
    Modulus of Elasticity PSI 42.45 x 106 46.09 x 106
    Flexural Strength PSI 46,500 49,500
    Impact Resistance, Charpy 6.5-6.8 7.0-7.6
    Specific Gravity, Bulk 3.58 3.72
    Thermal Conductivity - cal/cm2/cm/25°C .03-.05 .04-.055
    Hardness, MOHS Scale 9 + 9 +
    Color Off-White Pink
    Water Absorption 0 0
    Porosity, Helium Mass Spectrometer Vacuum Tight Vacuum Tight
    Firing Temperature °C 1675 1675
    Coefficient of Thermal Expansion
    25-700°C, cm/cm/°C    		 7.8 x 106 7.9 x 106
    Electrical      
    Dielectric Strength V/mil 1/4" Thick 220 230
    Dielectric Constant 106 9.25 9.60
    K @25°C 108 9.25 9.60
      1010 9.15 9.36
    Dielectric Loss Factor 25°C 105 .0007 <.0001
      106 .0006 .0005
      107 <.0001 .0004
      108 <.0001 .0004
      109 .0006 .0004
      1010 .001 .0015
    Volume Resistivity
    Ohms/cm3    		 250°C 6.00 x 1013 2.00 x 1014
      500°C 6.00 x 1010 1.2 x 1010
    Typical Composition
    Composition, Alumina Content, Nominally AL203 - 92% AL203 - 92%
      Si02 - Balance Si02 - Balance
      Mg0 - Balance Mg0 - Balance
      Ca0 - Balance Ca0 - Balance
        Cr203 - Balance

    Note: All data tests completed to ASTM Standards. Results are average for specimen tested and should be - but are not guaranteed to be - Applicable to parts made of the material.

    1. 1001 Lloyd Avenue
    2. Latrobe, PA 15650
    3. P: 724.539.1626
    4. F: 724.539.2540