Copper Cu content is generally > 99.90%, the content is relatively pure. It has good electrical conductivity and thermal conductivity, excellent plasticity, but the strength and hardness are weak, easy to hot pressing and cold pressure processing.

Bronze is an alloy added tin, lead or other elements to copper. It has high hardness, plasticity, wear resistance, corrosion resistance. It is used in casting various utensils, mechanical parts, bearings and so on.