C75200 zinc Cupronickel

C75200 zinc white copper
Material name: c75200 copper nickel zinc white copper
Brand: c75200
Standard: GB / T 4423-1992
Characteristics and scope of application:
It is a structural copper nickel zinc alloy with beautiful silver white appearance, commonly known as Deyin (originally China silver). This alloy has high strength, corrosion resistance and good plasticity. It can withstand pressure processing well in hot and cold states. It has poor machinability, poor weldability and elasticity better than Qsn6.5-0.1.
Chemical composition:
Copper (Cu): 62.0 ～ 65.0
Nickel + cobalt (Nico): 13.5 ～ 16.5
Zinc Zn: surplus
Lead Pb: ≤ 0.02
Lead Pb: ≤ 0.02
Boron P: ≤ 0.005
Iron Fe: ≤ 0.5
Manganese Mn: ≤ 0.3
Silicon Si: ≤ 0.15
Beryllium sb: ≤ 0.002
Sulfur s: ≤ 0.01
Arsenic as: ≤ 0.010
Carbon C: ≤ 0.03
Bismuth Bi: ≤ 0.002
Magnesium mg: ≤ 0.05
Note: ≤ 0.9 (impurity)
Mechanical properties:
Tensile strength σ b (MPa)：≥440
Elongation δ 10 (％)：≥5
Note: longitudinal tensile mechanical properties of bar at room temperature
Sample size: diameter or opposite side distance 5 ~ 12
Heat treatment specification: casting temperature 1170 ℃; Annealing temperature 700 ~ 750 ℃; Rolling hot working temperature 950 ～ 970 ℃; Low temperature annealing temperature for eliminating internal stress: 250 ℃