Plain-Carbon steel, commonly known as Mild steel, is the most typical form of steel because of its relatively low price while it provides additional metal properties more so than iron that are acceptable for most of applications. Low-carbon steel contains approximately 0.05–0.320% carbon making it supple and ductile. Mild steel has a relatively low malleable strength, but it is economical and easy to formulate; surface toughness can be increased through carburizing.