Medium and low alloy wear-resistant steels usually contain chemical elements such as silicon, manganese, chromium, molybdenum, vanadium, tungsten, nickel, titanium, boron, copper, rare earths, etc. The liners of many medium and large ball mills in the United States are made of chromium-molybdenum-silicon-manganese or chromium-molybdenum steel. Most grinding balls in the U.S. are made of medium- and high-carbon chromium-molybdenum steel. For workpieces working under abrasive wear conditions at higher temperatures (such as 200~500 °C) or workpieces subjecting the surface to higher temperatures due to frictional heat, alloy wear-resistant steels such as chromium-molybdenum-vanadium, chromium-molybdenum-vanadium-nickel or chromium-molybdenum-vanadium-tungsten can be used.
