Chemical composition: Copper Cu: 60.5 ~ 63.5 Zinc Zn: balance Lead Pb: ≤0.08 lead Pb: ≤0.08 boron P: ≤0.01 iron Fe: ≤0.15 beryllium Sb: ≤0.005 Bi Bi: ≤0.002 Note: ≤0.5 (impurity ) Usage: brass wire is used extensively for the manufacture of wires, cables, brushes and the like; thermal conductivity, used to manufacture beware of magnetic interference magnetic instruments, meters, such as compass, aviation instrumentation; plastic excellent, easy to heat pressure and cold pressure processing, can be made into tubes, rods, wire, strip, strip, plate, foil, copper. Treatment: thermal processing temperature of 650 ~ 850 ℃ annealing temperature of 600 ~ 700 ℃ to eliminate the stress of low temperature annealing temperature 270 ~ 300 ℃. Brass wire conductivity is very good, a lot for the manufacture of wires, cables, brushes and the like; thermal conductivity, used to manufacture beware of magnetic interference magnetic instruments, meters, such as compass, aviation instrumentation; plastic excellent, easy hot and cold pressure processing, can be made into tubes, rods, wire, strip, strip, plate, foil, copper. Copper smelting materials and processed products are two kinds. Good mechanical properties, thermal state plastic, plastic is acceptable under cold, good machinability, easy fiber welding and welding, corrosion resistance, but easy to produce corrosion cracking, in addition to cheap, is widely used an ordinary yellow copper species.