EN-GJL-150C is the annealed grade of grey cast iron, also known as GG15. This grade offers superior machinability and excellent surface finishes, but limited strength and wear resistance. Noise and vibration damping are excellent in this grade. In addition, this grade also offers excellent dimension stability and resistance to thermal cycling. This lower grade of grey iron is mainly used for applications where strength is not essential, such as counterweight, molded parts as well as precision castings.