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...Pure metals and alloys all fall into two categories they can either be or a metal consists of single element which means that it is only having one type atom in the most commonly used are aluminium copper iron lead zinc tin silver gold an alloy mixture more elements sometimes lack certain required properties to create these number combined together rarely because too soft normally mixed with other produce even stronger than mild steel resistant corrosion but still retain lightness name for general structural work example girders nuts bolts screws car body panels non cutting tools if coated called plate galvanised sheet terne make bodies cooking utensils engine cylinder heads window frames insulation foil food wrapping boats this much being poured give you clue aircraft duralumin parts medium carbon also garden axles shafts rear sprocket on bike high hand chisels punches tool centre punch...