Corson Alloys
NKC8738
High Performance Corson Alloy NKC8738
(UNS Alloy No. C70390)
Features
- NKC8738 is a Corson alloy with increased electrical conductivity while maintaining the strength of NKC388, a conventional high-strength Corson alloy. This is our original alloy with an excellent balance of strength and conductivity.
- NKC8738 contributes to the miniaturization, high density, narrow pitch, and heat generation of electronic components such as connector terminals and CPU sockets.
Table 1. NKC8738 chemical composition (%)
| Cu | Ni | Co | Si | |
|---|---|---|---|---|
| Standard composition | Remainder | 3.55 | 0.25 | 0.87 |
- Note that all numerical values shown are typical values.
Table 2. Physical properties of NKC8738
| Electrical Conductivity | 41 | %IACS (@20℃) |
|---|---|---|
| Specific resistivity | 42 | nΩ·m (@20℃) |
| Thermal Conductivity | 165 | W/mK |
| Thermal Expansion Coefficient | 17.6 | ×10-6/K (20 to 300℃) |
| Modulus of Elasticity | 123 | GPa |
| Specific Gravity | 8.83 |
- Note that all numerical values shown are typical values.
Table 3. Mechanical properties of NKC8738 (Top: Representative Value, Bottom: Specification Range)
| Temper | Tensile strength(MPa) | Yield strength(MPa) | Elongation(%) | Vickers hardness(Hv) |
|---|---|---|---|---|
| ESH | 1010 (920 – 1130) |
960 (880 – 1060) |
3 (≧0.1) |
300 (260 - 370) |
- Note that all numerical values shown are typical values.
Table 4. Bend formability of NKC8738 (90° W bend test, test piece shape: 0.2 mm wide × 30 mm long)
| Temper | Thickness (mm) | Minimum Bend Radius / Thickness | |
|---|---|---|---|
| Good way | Bad way | ||
| ESH | 0.05 | 0 | 0 |
| 0.12 | 1.0 | 1.0 | |
- Note that all numerical values shown are typical values.
Please inquire about bend formability of different thicknesses.
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