● Features and Scope:
Is wider application of leaded brass, good machinability, good mechanical properties, can withstand cold, hot pressure processing, easy fiber welding and soldering, general corrosion has good stability, but there are corrosion cracking tendencies.
● Chemical Composition:
Copper Cu: 57.0 ~ 60.0
Zinc Zn: margin
Lead Pb: 0.8 ~ 1.9
Lead Pb: 0.8 ~ 1.9
Boron P: ≤0.02
Al Al: ≤0.2
Iron Fe: ≤0.5
Beryllium Sb: ≤0.01
Bi Bi: ≤0.003
Note: ≤1.0 (impurity)
● Mechanical Properties:
Tensile strength σb (MPa): ≥440
Elongation δ10 (%): ≥5
Note: room temperature tensile mechanical properties of the strip
Sample size: Thickness ≥0.3
● Heat treatment: thermal processing temperature of 640 ~ 780 ℃; annealing temperature of 600 ~ 650 ℃; eliminate the stress of low temperature annealing temperature of 285 ℃