Corson Alloys

NKC164E

High Conductivity Corson Alloy NKC164E

Overview

Recent years have witnessed demand for copper alloy materials with higher electrical conductivity, to control the rise in heat generation from current flowing in increasingly compact connectors. We developed the high conductivity Corson alloy NKC164E to meet such demand. Along with high conductivity, it has excellent spring properties, bend formability, and thermal resistance. It is ideal for use where connectors for in-vehicle electronics, consumer electronics, or information devices must withstand particularly high current or offer high heat dissipation.
NKC164E is conformant with Japanese Automobile Standards Organization standard (JASO D620) JC300.

Features

  1. 1.A copper alloy combining high electrical conductivity of 55% IACS and 600 MPa-level strength.
  2. 2.Excellent bend formability enables contact bending and box bending.
  3. 3.It delivers superior stress relaxation resistance, even at high temperatures.

Table 1. NKC164E chemical composition (wt%)

  Cu Ni Si
Standard composition Remainder 1.6 0.35
  • Note that all numerical values shown are typical values.

Table 2. Physical properties of NKC164E

Electrical conductivity 55 %IACS (@20℃)
Specific resistance 30 nΩ·m (@20℃)
Thermal conductivity 240 W/mK
Linear expansion coefficient 17.7 ×10-6/K (20 to 300℃)
Modulus of elasticity 120 GPa
Density 8.89 g/cm3
  • Note that all numerical values shown are typical values.

Table 3. Mechanical properties of NKC164E
(upper: typical values, lower: specification range)

Temper Tensile strength
(MPa)
Yield strength
(MPa)
Elongation
(%)
Vickers hardness
(Hv)
H 630
(590-680)
610
(540-680)
12
5min
200
(160-220)
EH 690
(620-760)
670
(600-740)
5
2min
210
(170-230)
  • Note that all numerical values shown are typical values.

Table 4. NKC164E bend formability
(Test piece shape: thickness 0.2 mm × 10 mm wide × 30 mm long)

Temper MBR/t
Good way Bad way
H 0 0
EH 0 0.2
  • 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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