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Material Selection
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Connectors
1. Body materials
Cold rolled steel – lowest cost per unit weight of material
Kovar – when metal webbing is insufficient to support compression seals
300 series Stainless steel – non-magnetic; corrosion resistant properties; welding compatibility to Stainless assemblies
Inconel – tensile strength; corrosion resistant; non-magnetic; excellent option for high pressure operating environments
Hymu 80 – tensile strength; corrosion resistance; non-magnetic; welding compatibility to Nickel based assemblies
Titanium (Ti6Al4V & CP) – lightweight; non-magnetic; tensile strength; chemical resistant in specific applications; bio-compatible; welding compatibility to Ti assemblies
17-4 PH – tensile strength; not directly sealed with glass due to phase transformation temperature but suitable for attachment by welding of Inconel glass-to-metal-seals (GTMS)
Aluminum – thermal conductivity; lightweight; machinable; welding compatibility to Aluminum assemblies
Hastelloy – corrosion resistance; suitable for soldering without additional plating; welding compatibility to Nickel based alloys
Monel – corrosion resistant; suitable for soldering without additional plating; welding compatibility to Nickel based alloys
2. Contact materials
Alloy 52 – for compression seals; flexibility on termination features
Copper cored Alloy 52 – electrical conductivity
Kovar – for matched seals; stiffness; flexibility on termination features
446 Stainless steel – corrosion resistant; stiffness; weldable
42-6 Stainless steel – stiffness; flexibility on termination features
Alumel – thermocouple applications
Chromel – thermocouple applications
Iron – thermocouple applications
Constantan – thermocouple applications
Paliney 7 – used for specialized applications
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