S45C Carbon Steel Hex Bar is a medium carbon steel hexagonal bar manufactured according to JIS standards, offering a good combination of strength, hardness, and machinability. It is widely used for producing mechanical components such as shafts, pins, gears, bolts, and precision-machined parts. The hexagonal shape provides multiple flat surfaces for stable clamping and efficient processing, making it suitable for CNC machining and automatic manufacturing. With consistent quality, reliable mechanical properties, and excellent cost performance, S45C Carbon Steel Hex Bar is a popular choice for machinery, automotive, and industrial applications. Customized sizes, lengths, and surface conditions are available to satisfy different production requirements.