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Copper Nickel Zinc Alloy

Your Professional Copper Nickel Zinc Alloy Supplier

LUOYANG HONGSHENG TRADING CO., LTD , which is a specialized innovative metal manufacturer with professional research and development team, we have modern production lines, and rigorous quality management system. Our mainly products are metal materials including Copper, Steel,Titanium as well as metal alloys etc. We also provide OEM services such as manufacture the products according to customer drawings."TECHNOLOGY AND SERVICE LEADING THE MARKET" has become our company's culture.We expect to establish long-term cooperation with you through high-quality products and professional services.

Product Catalog Overview

Copper-nickel-zinc alloys are commonly known as Nickel Silvers or German Silvers (despite containing no silver). These alloys are valued for their silvery-white appearance, excellent corrosion resistance, good machinability, and favorable cold formability.

The most common commercial grades are designated as UNS C78200 (leaded nickel silver 65-8-2) and other C7xxxx series alloys

Fabrication & Processing

Process	Suitability	Notes
Machinability Rating	60%	(UNS C36000 free-cutting brass = 100%)
Cold Working	Good	Excellent formability
Hot Working	Poor	Not recommended
Annealing Temperature	500 – 622°C (930 – 1150°F)	—

Available Forms

Copper-nickel-zinc alloys are available in various forms:

Form	Size Range / Notes
Round Bars	0.4 mm – 300 mm diameter
Hexagonal Bars	Custom sizes available
Square Bars	Custom sizes available
Flat Products / Sheets	Various thicknesses
Profiled/Shaped Bars	Available upon request
Tubes & Pipes	Available from some suppliers

Processing method by size:

Below 35 mm diameter: Drawn (cold worked)

Above 35 mm diameter: Forged or hot extruded

Comparison with between Copper-Nickel-Zinc Alloys

UNS Designation	Cu %	Ni %	Zn %	Pb %	Common Name
C74500	65	10	25	0.25 max	Nickel Silver 65-10
C75200	65	18	17	0.25 max	Nickel Silver 65-18
C75400	65	15	20	0.25 max	Nickel Silver 65-15
C75700	65	12	23	0.25 max	Nickel Silver 65-12
C78200	65	8	25	2.0	Leaded Nickel Silver 65-8-2

Source:

The key distinction of C78200 is the lead addition (1.5-2.5%) , which significantly improves machinability at the cost of slightly lower cold formability compared to lead-free nickel silvers.

C78200 Copper Alloy Bar

UNS C78200 is a leaded nickel silver copper alloy (also known as 65-8-2 alloy), recognized for its excellent corrosion resistance, good machinability, and favorable cold formability. It belongs to

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C76400 Copper Strip

Grade:C76400,CuNi18Zn20,BZn18-20. Standard:UNS,EN,JIS,GB. Size: THK:0.01-3mm. Width:UP to 1200mm. Shape:Customised Shape. Surface: Bright. Sample:Available. Package:Wooden Cases

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C77000 Copper Nickel Zinc Strip

C77000, also known as Cupronickel 70-30, is a copper-nickel-zinc alloy that combines excellent corrosion resistance, strength, and durability. This alloy is composed of approximately 70% copper, 30%

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C77000 Copper Nickel Zinc Alloy

C77000 Copper-Nickel-Zinc Alloy is a highly versatile material valued for its silvery appearance, corrosion resistance, and excellent mechanical properties. Its applications range from decorative and

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C75200 Copper Strip

Grade:BZn18-18,C75200,CuNi18Zn20,C7521. Standard:GB,UNS,EN,JIS. Temper:Soft ,1/4hard ,1/2hard, hard,T-hard. Size: Thickness 0.01-5mm,Width:7-610mm. Surface:Bright like silver. MOQ:50kg. Delivery

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Why Choose Us

Production Market
Our products not only satisfy the demand on the domestic market, also exported to Asia, Africa, Europe and America etc. We set up a long time relationship with our Pakistan,UK,Noway customers for copper tube, copper foil, Titanium tube, Nikle Copper Alloy etc excellent projects due to our good service and professional technical supports.

Product Application
Our product is widely used in air conditioning and new energy vehicle, hardware& components, Power Engineering, industrial motors, wind power, Solar Energy Systems, Electric Vehicle and 5G Telecommunication, Consumer electronics, Petroleum industry, aviation industry, high-tech medical equipment and other industries.

Quality control
We have advanced production equipment and assembly lines, professional r&d team and excellent management team，our products comply with international processes and standards from the material selection, production, quality inspection, packaging, and transportation.

24h online service
We try and respond to all concerns within 24 hours and our teams are always at your disposal in case of any emergencies.

Product Description

Product	Thickness	Width
Copper Tape;Copper Strip Copper Foil Copper Sheet	0.04-5.0mm	5-1220mm
Copper-nickel-zine alloy Strips Copper-nickel-zine alloy Sheets	0.05-5.0mm	5-320mm
Brass Strip Brass Sheet	0.04-2.0mm	5-305mm

Paramenters

Alloy No.	Chemical Composition
Alloy No.	Cu	Mn	Ni	Zn
C75200	63.0-66.5	0-0.5	16.5-19.5	Remainder
C7541	60.0-64	0-0.5	12.5-15.5	Remainder
C77000	53.5-56.5	0-0.5	16.5-19.5	Remainder

What is Copper Nickel Zinc Alloy？

Copper-nickel-zinc alloys, often called nickel silvers, are a family of alloys composed of copper, nickel, and zinc. These alloys are known for their silver-like appearance, good corrosion resistance, and excellent mechanical properties. They can be found in both wrought and cast forms, with varying compositions depending on the desired properties.

Advantages of Copper Nickel Zinc Alloy

Corrosion Resistance

Copper-nickel-zinc alloys, particularly those with higher nickel content, exhibit good resistance to corrosion, making them suitable for marine environments and applications where exposure to moisture or certain chemicals is a concern.

Workability

Copper-nickel-zinc alloys are relatively easy to machine, form, and join, making them versatile for manufacturing processes. They can be drawn, stamped, and soldered without significant difficulty.

Aesthetic Appeal

The presence of nickel gives these alloys a silvery appearance, making them desirable for decorative applications and where a non-tarnishing silver-like look is preferred.

Good Electrical Conductivity

Although not as conductive as pure copper, the alloy still retains reliable electrical properties suitable for low-current uses.

Antimicrobial Properties

Some studies suggest that copper-nickel alloys, including those with zinc, can exhibit antimicrobial properties, inhibiting the growth of bacteria and other microorganisms.

Production process of Copper Nickel Zinc Alloy

Raw Material Preparation: Copper, nickel, and zinc are carefully weighed and prepared according to the desired alloy composition.

Melting: The raw materials are melted together in a furnace, often at temperatures between 1050°C and 1200°C for casting.

Alloying: The molten metals are thoroughly mixed to ensure a homogeneous alloy.

Continuous Casting: For wrought products (like rods, wires, or sheets), continuous casting is often used. Molten alloy is poured into a mold and continuously drawn out as it solidifies.

Hot or Cold Working: Wrought alloys are shaped by processes like rolling, drawing, or extrusion. These processes can be done hot or cold, with cold working often preferred for achieving specific mechanical properties.

Annealing: Heat treatment processes like annealing are used to relieve stress, refine grain structure, and improve ductility.

Final Forming: The alloy is further processed to achieve the desired final shape and dimensions through processes like stretching, rolling, or other forming techniques.

Application of Copper Nickel Zinc Alloy

Electronic Components

Used in shielding materials, battery connectors, and low-voltage contacts.

Decorative Finishes

Popular in the manufacture of musical instruments, jewelry, and architectural trim due to its visual appeal.

Precision Engineering

Employed in producing washers, spacers, and miniature parts in the automotive and aerospace sectors.

Coinage and Medals

Historically and currently used in minting coins and collectible medallions.

FAQ

Q: What is the alloy of copper-nickel and zinc?

A: Nickel silver is an alloy of copper, zinc and nickel which must consist of at least 5% nickel, at least 20% zinc and at least 45% copper. Nickel silver has several qualities that other alloys do not possess and which make it so successful in use: Nickel silver is much more resistant to corrosion than brass.

Q: Does copper zinc alloy rust?

A: Brass is an alloy primarily made of copper and zinc. Like copper, it does not rust in the traditional sense, but it can experience tarnishing due to copper oxide forming on the outer layer. This process is generally even slower than the oxidation of copper, due to the lesser copper content.

Q: What is cupro nickel used for?

A: Cupronickel is a binary alloy of copper and nickel that is not susceptible to heat treatment and can only be hardened through cold working. It has high corrosion resistance and is commonly used in condenser, distiller, evaporator, and heat exchanger tubes.

Q: What are the properties of copper nickel alloy?

A: Copper-nickels have established properties which show high resistance to seawater corrosion and biofouling. This includes resistance to chlorides in terms of pitting, crevice corrosion and stress corrosion cracking, even in hotter climates.

Q: What is the alloy of copper, zinc, and nickel called?

A: -German silver or nickel silver is an alloy whose main component is copper with varying quantities of nickel and zinc and is occasionally found to have trace amounts of tin and lead. -It is known for its toughness, hardness and corrosion resistance.

As one of the leading copper nickel zinc alloy manufacturers in China, we warmly welcome you to buy high quality copper nickel zinc alloy at competitive price from our factory. For more cheap products, contact us now.

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