CuNi18Zn18-UNS.C75200 Zinc Cupronickel Alloys

Specifications

C75200 Zinc Cupronickel Alloys

CuNi18Zn18 - UNS.C75200 Nickel Silver Alloys, also called Copper-Nickel-Zinc alloys, 65-18-18 respectively, which has good formability, good corrosion and tarnish-resistance performance, and this alloy has the pleasing silver-like color.

Typical Application for C75200 Nickel Silver Alloys
Consumer: Musical Instrument Parts & Components, Optical Instrument Components, Radio Dials, Name Plates, Hollow Ware, Costume Jewelry, Camera Parts, Bows, Table Flat Ware, Zippers
Fasteners: Screws, Rivets and Slide Fasteners
Industrial: Truss Wire, Base for Silver Plate, Core Bars, Templates, Etching Stock
Architecture: Decorative Applications
Available Sizes:
Custom Diameter & Sizes, Random Mill lengths

Available Products (forms):
Round bars, Flat bars, Square bars, Rectangular bars, Hexagon bars
Custom shapes are available upon request.

Chemical Composition:

Cu: 63.0-66.50%
Ni: 16.50-19.50%
Fe: 0.25% Max.
Pb: 0.05% Max.
Mn: 0.50% Max.
Zn: Balance

Note: Copper plus additions equal 99.50% minimum.

Typical Physical Properties:

Specific Gravity: 8.75 g/cm3
Coefficient of Thermal Expansion per °C: 16.20 x 10-6 (20-300°C)
Electrical Conductivity (% IACS): 6% @ 68 F
Thermal Conductivity: 19.00 Btu · ft/(hr · ft2·oF)at 68F
Modulus of Elasticity in tension: 18000 ksi

Note: 
1). the units are based upon US Customary.
2). the typical physical properties apply to age hardened products.

International Specification:

Rods/Bars: UNS.C75200, CDA752, ASTM B151, B122, B206, B248
European Standards: CuNi18Zn20, CuNi18Zn18, JIS C7521, BZn18-18, NS 106

Note: 
ASTM: American Society for Testing and Materials 
RWMA: Resistance Welder Manufacturers' Association 
Note: Unless otherwise specified, material will be produced to DIN & RWMA.

Mechanical Properties:

The detailed Mechanical Properties will be available on request from customers.

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