DT4C, also known as industrial pure iron, is a high-quality steel with an iron content of over 99.5%. It is a low-carbon, low-sulfur, and low-phosphorus iron with a carbon content of less than 0.04%. DT4C is exceptionally soft, remarkably tough, and possesses excellent electromagnetic properties. It has a higher melting point than iron, is less susceptible to rust in humid air, and can be passivated in cold concentrated sulfuric acid. Its excellent performance includes low coercivity (Hc), high magnetic permeability (u), high saturation magnetic induction (Bs), stable magnetic properties, and no magnetic aging. It is a cost-effective magnetic conductive material. It is widely used in electronics, electrical components, magnetic materials, amorphous products, relays, sensors, automotive brakes, textile machinery, electric meter solenoid valves, and other products. Commonly used electrical pure irons include DT4, DT4A, DT4E, DT4C, DT8, DT8A, DT8E, and DT8C.