Baosteel electric iron DT4E DT4E round DT4E steel industry iron ingot iron carbon content not exceeding 0.04% of iron, also known as ingots. Purity of 99.8% to 99.9%, lower than electrolytic iron, so its strength, hardness, high elastic modulus than electrolytic iron, but the plastic is lower. Pure iron with open-hearth production, oxidation of expertise, in order to remove carbon and other impurities, so the cost is very high. Hot brittleness at 860 ~ 1050 ℃, thermal processing should pay special attention, it is best to avoid the brittle temperature range. Mechanical properties are not affected by heat treatment. Can be used in construction, manufacturing rust-proof materials, galvanized sheet, tin plate, magnet cores. Some industrial iron also copper (0.25% to 0.30%), to increase the corrosion resistance of pure iron is a steel, its chemical composition is mainly iron content of 99.50% -99.90% carbon content 0.04% or less, and other elements as small as possible. Because it is actually not the real iron, so calling it A near-iron steel for industrial iron. Special soft texture of general industrial pure iron, ductile particularly large, good electromagnetic properties. There are two common specifications, one is as a dark red material, may be stamped into a very complicated shape; the other is used as an electromagnetic material having a low magnetic resistance in the sense of a high magnetic.