Invar tube is an alloy of nickel-iron with a low thermal expansion coefficient that offers excellent strength and toughness in cryogenic temperatures. Invar is a popular choice for a variety of applications in the semiconductor, aerospace and information technology industries.
Invar tubing is a custom manufacturer of precision deep drawn metal tubing made from Inconel, Invar, Kovar and Monel alloys. These tubing are available in a variety of lengths and widths with +/-0.0001 inch tolerance.
CNC machined, laser cut, slitting, shearing, welding, forming, knurling, flaring and gun drilling are services offered. Serves the medical, electronics, pharmaceutical, aerospace and specialty automotive markets.
These tubes are manufactured to AMS, QQS, ASTM and military specifications. Round, square and rectangular shapes are available with a variety of metal finishes.
This material exhibits a near zero rate of thermal expansion at temperatures as low as -100°C to as high as 200°C. This makes it ideal for applications in which dimensional changes must be minimal, such as tooling for aerospace composites and structural members in precision equipment such as lasers, measuring devices and thermostats.
Other alloys exhibiting low expansion include Carpenter Technology Super Invar “32-5” (ASTM B-753), which extends to around 250°C, and Low Expansion “39” alloy. These alloys are used for structural components in precision laser and optical measuring systems, wave guide tubes, microscopes, support systems for giant mirrors in telescopes and a variety of scientific instruments requiring mounted lenses.
This alloy is a machine-like material that can be welded in conventional processes like GTAW (Gas Tungsten Arc Welding). In addition, orbital welding can be applied to Invar to improve speed, control and precision.