CuNi2Si-Copper Nickel Silicon Alloys

Specifications

CuNi2Si-Copper Nickel Silicon Alloys

C64700/C70250 Details & Applications:

1)C64700/C70250 Copper Nickel Silicon

CuNi2Si – UNS.C64700/C70250 Nickel Silicon Bronze Alloys, which is an age-hardening alloy, higher alloyed in comparison with CuNi1.5Si, for current-carrying formed parts. It has an a-structure with very fine precipitations and recommends itself both for lead frames which require a high rigidity of the pins and for connector with high demands on the electrical conductivity, strength and relaxation behavior. In addition, the CuNi2Si can also be used for current-carrying formed parts and contact springs due to its good fatigue strength, forming and spring properties.

2)Typical Application for C64700/C70250 Nickel Silicon Bronze Alloys:

Electrical : Resistance Welding Electrodes, Motor Rotor Bar, And Resistance Welding Tips.
Fastener   : Fastener parts
Industrial : Brazing Rod, Welding Rod

3)Available Sizes:
Custom Diameter & Sizes, Random Mill lengths

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

5)Chemical Composition:

Ni: 1.60-2.20%
Si: 0.40-0.80%
Fe: 0.10% Max.
Zn: 0.50% Max.
Cu: Balance
Note: Copper plus additions equal 99.50% minimum.

6)Typical Physical Properties:

Specific Gravity: 8.80-8.90 g/cm3
Coefficient of Thermal Expansion per °C: 17 x 10-6 /K (20-300°C)
Electrical Conductivity (% IACS): 38 (22 Ms/m)
Thermal Conductivity (W/mk): 250 
Modulus of Elasticity (10 3 MPA): 130

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

7)International Specification:

Rods/Bars/Plates/Sheets: UNS.C64700, UNS.C70250, RWMA Class 3

European Standards: CuNi2Si, DIN 2.0855, CW111C to EN

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.

   We can handle your entire projects form beginning to end,from sample to shipping and all project management for the production runs.