What are the main component metals of "white metal"?

"White metal" typically refers to a group of alloys known for their silvery-white appearance and excellent casting properties used in applications such as bearings and other machinery components. The primary component metals of white metal are lead and tin.

Lead offers good malleability and ductility, while tin enhances the fluidity of the alloy during casting and improves resistance to corrosion. The combination of these two metals results in a material that can adequately withstand wear and tear, making it ideal for use in bearings where low friction is essential.

The other options consist of metals that do not typically form white metal alloys or do not share the combination characteristics associated with the desired applications of white metals. Bronze and tin, while they can form alloys, do not constitute white metal. Similarly, aluminum and lead, as well as copper and iron, diverge from the definition and properties associated with traditional white metal alloys.