
First discovered all the way back in the late 1800s, Invar is an alloy that’s made up of 64 percent iron and 36 i ni'a i te hanere o te moni. Although it was originally used to create things like thermostats for electric immersion heaters, it plays a key role in an assortment of things today. You’ll find Invar in electric… Taio rahi atu a »