Corson Alloys

NKC164

NKC164
High Bend Formability Copper Alloy for Electronic Parts (UNS Alloy No. C64745)

Overview

NKC164 is our proprietary Corson alloy, combining high strength, high electrical conductivity, and excellent bend formability. It is ideal for use where connectors in vehicle electronics, consumer electronics, or information devices demand especially difficult bending work. It is also available with reflow tin plating.

Table 1. NKC164 chemical composition (%)

  Cu Ni Si Sn Zn
Standard composition Remainder 1.6 0.4 0.5 0.4

Table 2. Physical properties of NKC164

Electrical conductivity 43 %IACS (@20℃)
Specific resistance 40.1 nΩ·m (@20℃)
Thermal conductivity 170 W/mK
Linear expansion coefficient 17.6 ×10-6/K (20 to 300℃)
Modulus of elasticity 127 GPa
Density 8.87 g/cm3

Table 3. Mechanical properties of NKC164
(upper: typical values, lower: specification range)

Temper Tensile strength
(MPa)
Yield strength
(MPa)
Elongation
(%)
Vickers hardness
(Hv)
1/2H 640
(560-680)
610
(520-670)
8
(5min)
190
(160-230)
H 680
(620-740)
660
(580-730)
6
(3min)
200
(170-240)
EH 730
(680-800)
720
(640-790)
4
(1min)
220
(200-270)

Table 4. Bend formability of NKC164
(90° W bend test, test piece shape 0.2 mm thick × 10 mm wide × 30 mm long)

Temper MBR/t
Good way Bad way
1/2H 0 0
H 0 0
EH 0 1.5
  • MBR/t: Minimum bend radius without cracking/thickness
  • Note that all numerical values shown are typical values.
    Please inquire about bend formability of different thicknesses.
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