Metalworking Ordinary Copper [SCM440] Features

Suitable for shafts and bolts/nuts.

SCM440 is a relatively hard type of chrome-molybdenum steel. It has a yield point of 835 or higher and a hardness of approximately 285 to 352. It is produced from killed steel through rolling and forging. The difficulty of processing the steel depends on the presence of ductility when grinding or polishing. If it is only hard, it can be processed relatively easily. ◎ Suitable Applications - General machine parts - Shafts - Bolts and nuts ◎ Features - High hardenability - Good machinability - High-frequency hardening - Vacuum hardening ◎ Suitable Processing - Milling machining - Lathe machining - Grinding after hardening It is one of the alloy steels for mechanical structures, commonly referred to as "chrome-moly" or "chrome-molybdenum steel." It is an improved version of chrome steel with the addition of molybdenum, offering superior hardenability compared to SCr materials. In addition to excellent resistance to tempering, it has superior mechanical properties and toughness, making it suitable for automotive parts and bolts and nuts. It is said to maintain strength even at high temperatures around 500°C, and is sometimes used in areas where high temperature and high pressure are prerequisites.

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