Description
Cupronickel alloys are widely used for marine applications due to their excellent resistance to seawater corrosion, low biofouling rates, and good fabricability. They have provided reliable service for decades while offering effective solutions to today’s technological challenges addition of nickel to copper improves strength and corrosion resistance while allowing the alloy to remain ductile.
Alloy C72500: Developed by Bell Laboratories to solve issues of stress corrosion found in field parts. The alloy blends the strength of Phosphor Bronze and the Corrosion resistance of Nickel Silver without too much loss of electrical conductivity. A combination of very good fatigue strength and resistance to corrosion and tarnish have also made this alloy an excellent choice for other applications found in corrosive environments or applications requiring improved solderability.
Chemistry Typical
UNS# COPPER NICKEL LEAD IRON ZINC OTHER
C70600 Balance 9.0 – 10.0* 0.05 max 1.0 – 1.8 1.0 max 1.0 Mn max
C71500 Balance* 29.0 – 33.0 0.05 max 0.40 – 1.0 max 1.0 max 1.0 Mn max
C72500 Balance 8.5 – 10.5* 0.05 max 0.6 max 0.50 max | 1.8 – 2.8 Sn, 0.20 Mn max
Physical Properties
Typical Density: 0.321 – 0.323 lbs/in3, 8.88 – 8.94 g/cm3
Electrical Conductivity: (% IACS at 68° F 20°C, annealed): 4.6 – 11 %
Mean Coefficient of Thermal Expansion: µin/in-° F:
68 – 572 ° F: 8.5 – 9.2
Thermal Conductivity: BTU-in/hr-ft2-° F at 68 ° F: 17 – 31
Modulus of Elasticity: KSI
18 – 22 x 103 in tension
Applications
Cupronickels Alloys: Condensers; Evaporator and heat exchanger application; Ferrules; Applications where biofouling is a concern; Silver colored coinage.
Copper-Nickel-Tin Alloys: Relay springs; Switch springs; Lead frames; Telecommunication connectors
FAQ
Q: what does your company do?
A：Our company is a professional manufacturer. We mainly produce stainless steel plate series (hot-rolled and cold-rolled 200, 300 and 400 Series), stainless steel pipe and coil, ppgi and galvanized steel plate and coil.
Q: what are the advantages of your company?
A: (1): high quality and reasonable price.
(2) : extensive and good after-sales service experience.
(3) : each process will be inspected by the responsible QC to ensure the quality of each product.
(4) : professional packaging team to keep each package safely.
(5) : the trial order can be completed within one week.
(6) : samples can be provided according to your requirements.
Q：what’s your price?
A：Our price is very competitive because we are a factory. If you are interested in our products, please feel free to contact us.
Q：how long is your delivery time?
A：Different products have different delivery times. The products will be delivered as soon as possible on the basis of quality assurance. The usual delivery time is within 5 days after we receive your deposit.
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