C45 Plastic Mould Steel/ C45 Steel is a medium carbon steel, commonly used in various industrial applications, including as a plastic mould steel. It is equivalent to DIN 1.0503 and is known for its good machinability, moderate strength, and versatility. While not specifically designed for high-end plastic moulds, C45 Steel is often used for simpler moulds or components due to its cost-effectiveness and reliable mechanical properties.