Low Carbon Steels (aka mild steel) are those with relatively more carbon than electrical steels (usually 0.05% to 0.3% C). They are very lossy above ~ 5 Hz. So they are used mostly in applications that carry large flux at low frequencies. These include rotors, pole pieces, solenoids, actuators, lifting magnets etc. They are more ductile and machinable than electrical steels. Because of higher carbon content, they are prone to aging. Their magnetic properties can vary with manufacturer, heat, form and annealing. They are available as sheets, rods, tubes etc in fully annealed or hardened condition.
This folder contains 89 BH curves for a variety of carbon steels, e.g., 10xx series steels, 4340 etc in cold/hot rolled, annealed/ un-annealed conditions. It also lists six grades of pure iron (ie.carbon completely removed, so does not suffer from aging). By downloading this folder you will have magnetic properties of most low carbon steels produced worldwide at your finger tips!
Please review the User Manual for full list of all low carbon steels contained in this folder and more information on their usage.