CMI-B Magnetic Iron is an ultra-low-carbon magnetic iron especially processed for good magnetic properties and processability. It is used for relays and other electromagnetic applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Fe-73. Producer or source: Connecticut Metals Incorporated.