Corson Alloys

NKC286

NKC286
High Strength Corson Alloy for Electronic Parts
(UNS Alloy No. C64728)

Overview

NKC286 is a Corson alloy combining high strength, high electrical conductivity, and excellent bend formability.
Conformant with JASO (Japanese Automobile Standards Organization) standard JC400, it is ideal for in-vehicle applications demanding particularly high strength. It is also available with reflow tin plating.

Table 1. NKC286 chemical composition (%)

  Cu Ni Si Sn Zn
Standard composition Remainder 2.8 0.6 0.5 0.4

Table 2. Physical properties of NKC286

Electrical conductivity 41 %IACS (@20℃)
Specific resistance 42.1 nΩ·m (@20℃)
Thermal conductivity 165 W/mK
Linear expansion coefficient 17.4 ×10-6/K (20 to 300℃)
Modulus of elasticity 127 GPa
Density 8.87 g/cm3

Table 3. Mechanical properties of NKC286
(upper: typical values, lower: specification range)

Temper Tensile strength
(MPa)
Yield strength
(MPa)
Elongation
(%)
Vickers hardness
(Hv)
1/2H 780
(710-840)
760
(690-830)
6
(min.3)
230
(200-270)
H 830
(760-890)
810
(740-880)
4
(min.2)
245
(210-280)
EH 880
(810-940)
860
(790-930)
2
(min.1)
260
(230-300)

Correlation between Yield strength and bend formability

  • Test piece shape: thickness × 10 mm wide × 30 mm long
    For reference purpose only. They are observed values, not guaranteed values.

Stress relaxation resistance

  • For reference purpose only. They are observed values, not guaranteed values.

Temperature rise during current flow

  • Test piece size (thickness × width × length): 0.15 mm × 1 mm × 30 mm
  • Current: 1 to 5A
  • For reference purpose only. They are observed values, not guaranteed values.
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