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 large and medium-sized ball mills in the United States are made of chromium-molybdenum-silico-manganese or chromium-molybdenum steel. Most of the grinding balls in the United States are made of medium and high carbon chromium molybdenum steel. Workpieces that work under relatively high temperature (such as 200～500℃) abrasive wear conditions or whose surface is subjected to relatively high temperature due to frictional heat can be made of chromium molybdenum vanadium, chromium molybdenum vanadium nickel or chromium molybdenum vanadium tungsten alloys. Grinding steel, this type of steel has a secondary hardening effect when it is tempered at medium or high temperature after quenching.
