It is suitable for working under severe abrasive wear conditions, suitable for crushing hard, high SiO2, strong abrasive limestone. In our country, we take the lead in adopting out-of-furnace refining and integral pressure casting technology. The molten steel is purer and the matrix is more compact. The service life of mill hammer is 50-98% longer than that of common high manganese steel hammer, and the use is safer and more reliable.