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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◎Quenching The quenchability is good. Types of quenching include high-frequency quenching and non-oxidizing quenching. ◎Cost Reduction Using SCM440 If a certain level of hardness is desired but the hardness is insufficient with tempering, using SCM series steels like PX5 or HPM7 (Pre-Guardon steel, HRC30) can eliminate the need for heat treatment. ◎Tempering and Tempered Materials There are tempered materials. The hardness is approximately HRC23 to 25. ◎Weldability Compared to aluminum and titanium, the weldability is excellent. ◎Grinding and Polishing It is a tough material, but it is common to use CB wheel grinding stones or WA series grinding stones. ==========＝＝＝＝＝＝＝＝＝＝＝＝＝ From the related catalog, you can download a summary table of the characteristics of ordinary copper. Please refer to it for processing guidance if you wish. Characteristics Related to Processing [Ordinary Copper] ===========＝＝＝＝＝＝＝＝＝＝＝＝
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Nango Co., Ltd., located in Uji City, Kyoto, specializes in precision machining of one-of-a-kind metal products and the production of various jigs and labor-saving machines essential for improving manufacturing efficiency. With machining (lathe and casting), design and production, and commercial functions as our three pillars, we respond to our customers with "flexible support, proposals, and consultation that large companies cannot provide." Our skilled craftsmen, well-versed in metal, meticulously finish each machined product. Additionally, our technical proposal capabilities have been honed through over 40 years of involvement in the automotive industry. We sincerely respond to all requests for machining.