It has excellent plasticity (the best among brass), high strength, good machinability and easy welding, and is very stable to general corrosion, but it is prone to corrosion cracking in ammonia atmosphere. H68 is the most widely used variety in brass. Adding trace arsenic to H68A can prevent dezincification of brass and improve its corrosion resistance.

The annealing temperature is 520-650 DEG C; The low temperature annealing temperature for eliminating internal stress is 260 ~ 270℃.

Chemical composition: copper Cu :67.0~70.0? Zinc Zn: allowance? Pb: ≤ 0.03？ Boron p: ≤ 0.0 1? Iron Fe: ≤ 0. 10

Beryllium Sb :≤0.005? Bibby: ≤ 0.002? Note: ≤0.3 (impurities)

Mechanical properties: tensile strength σ b (MPa): 390 ~ 530? Elongation δ 10 (%): ≥ 13? Hardness: 105 ~ 175 HV

Note: What are the tensile mechanical properties of the strip at room temperature? Sample size: thickness ≥0.3

Heat treatment: the hot working temperature is 750 ~ 830℃; The annealing temperature is 520-650 DEG C; The low temperature annealing temperature for eliminating internal stress is 260 ~ 270℃.