Invar® Coil

Invar Coil provides an exceptionally low coefficient of thermal expansion, high dimensional stability, and good mechanical strength in a rolled foil or sheet format. These properties make this iron-nickel alloy uniquely valuable in applications where precise dimensional control under temperature fluctuations is required. Industries including aerospace, electronics, and optics employ Invar coils in precision instruments, cryogenic engineering, and shadow masks for cathode ray tubes. Specific applications include sealing glasses to metals in electronic packages, cryogenic containers, and thin precision laminates for aerospace systems. Research uses extend to advanced thermal stability studies, microelectromechanical systems (MEMS) fabrication, and testing of expansion-constrained composites. The coil form ensures adaptability for cutting, stamping, and lamination, while its ability to maintain structural integrity in demanding environments reinforces Invar’s critical role in high-precision industrial and scientific systems.