Invar alloy strip is a specialized iron-nickel-based precision alloy whose most remarkable property is its near-zero thermal expansion between room temperature and approximately 200 °C—earning it the nickname “invariable steel” or simply “Invar.” The material also offers good machinability, weldability, and magnetic properties. It is widely used in applications demanding ultra-high dimensional stability, such as:
With the rapid advancement of emerging industries—including flat-panel displays, quantum devices, and advanced sensors—the strategic importance of Invar strip continues to grow, solidifying its role as an indispensable foundational material in high-end manufacturing.
