An alloy bar is a bar of metal with added elements, known as alloying elements, to enhance its properties like strength, hardness, wear resistance, and corrosion resistance. Common alloy bars include alloy steel and aluminium, used in various sectors like automotive, aerospace, construction, and machinery for creating tools, machine parts, and structural components. These bars can be customized in shape, size, and specific alloy composition to meet unique project requirements, with heat treatment often used to further refine their microstructure and mechanical properties.