Metal materials include many types, some of the common metal materials include: 1. iron, steel, cast iron, etc., these materials are widely used in construction, machinery manufacturing and other fields; 2. aluminum, magnesium, titanium and other light metals, these materials are in Aviation, automobile manufacturing and other fields are widely used; 3. copper, nickel, zinc, etc., these materials are used in wire and cable, electronic equipment and other fields; 4. Silver, gold, platinum and other precious metals, these materials are mainly used in jewelry, medical equipment and other fields. In addition, there are many other types of metal materials, such as titanium alloy, aluminum alloy, stainless steel, etc.