CarTech Chrome Core 18-FM Solenoid Quality stainless is a soft magnetic ferritic material designed for operation in more corrosive environments than tolerated by 18% Cr-Fe Type 430 stainless. This new material has corrosion resistance superior to that of CarTech 430FR Solenoid Quality stainless with generally similar magnetic properties.

CarTech Chrome Core 18-FM Solenoid Quality stainless is stabilized with columbium to provide improved corrosion resistance with optimum machinability. The alloy balance also provides resistivity similar to that of CarTech 430FR Solenoid Quality stainless. High resistivity is beneficial in applications involving AC excitation due to the suppression of eddy current losses.

CarTech Chrome Core 18-FM Solenoid Quality stainless is available in the magnetically soft condition, requiring only machining for production of solenoid parts. This alloy may be used as machined if tooling and coolants are not laden with free iron from machining carbon steel. Users who perform their own heat treatment may purchase material which has not been treated at Carpenter.