SSC INVAR 36 (UNS K93603) is an austenitic nickel-iron alloy containing 36% nickel. It has an extremely low coefficient of thermal expansion from -418°F (-250°C) to 392°F (200°C). The alloy has good fatigue and mechanical properties at cryogenic temperatures. It exhibits moderately high strength along with good ductility and toughness. These properties along with good fabrication characteristics make SSC INVAR 36 ideal for applications requiring precise dimensional stability.

SSC INVAR 36 can be hot and cold worked, machined, and formed. Fabrication processes are similar to austenitic stainless steels. The alloy can be welded using filler wire with expansion rates similar to those of the base metal.

SSC INVAR 36 resists corrosion in dry atmospheres at room temperature. In humid or moist atmospheres, corrosion can occur in the form of rust.

Applications

• Tooling and Dies for Aerospace Composite Tooling

• Thermoset Epoxy Systems

• Resin Transfer Molded Tools

• Cryogenic Components and Piping

• Laser Components

• Liquified Natural Gas (LNG)

• Production and Storage Equipment

• LNG Tanker Membranes

• Marine Components

• Wind Turbines