S45C Steel Grade is one steel grade material in JIS G4051. which is standard specification of carbon steels for machine structural use. Specifically, this is standard for heat treatable steels, alloy steels and free cutting steels. JIS S45C Steel is a medium strength steel. Suitable for shafts studs, keys etc. Available as rolled or normalised. JIS S45C machinery steel are usually supplied as square bar, or round bar or flat. JIS Steel S45C is excelling in weldability & machinability , and S45C steels can be subjected to various heat treatments.