CuNi18Zn20 – UNS.C76400 Nickel Silver Alloys

C76400 Details & Applications:
C76400 Nickel Silver Alloys

CuNi18Zn20 - UNS.C76400 Nickel Silver Alloys, also called Copper-Nickel-Zinc alloys, 62-18-20 respectively, which has good formability, good corrosion and tarnish-resistance performance, and this alloy has the pleasing silver-like color.

Typical Application for C76400 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: 60.0-63.00%
Ni: 17.00-19.00%
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: 8.73 g/cm3
Coefficient of Thermal Expansion per °C: 17.20 x 10-6 (20-300°C)
Electrical Conductivity (% IACS): 5.70% @ 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.C76400, CDA764, ASTM B151, B206
European Standards: CuNi18Zn20, JIS C7521, BZn18-20, NS 106, CW 409 J

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.