12L14 is a standard resulfurized and rephosphorized carbon steel. Lead is also added in order to increase machinability, and it also means it can be bent, riveted, or crimped. However, this extra ductility and machinability do mean that 12L14 is slightly weaker than comparable carbon steel alloys. It is typically used in high-speed screw machine products and other high-speed machines.
Common Trade Names
UNS G12144, AISI 12L14, Free-Machining Steel, Ledloy™