Titanium Copper Alloy
C1990
C1990
High strength, superior stress relaxation resistance
Overview
Titanium copper alloy C1990, combining high strength with excellent bend formability, has properties similar to beryllium copper (mill-hardened material). It is designed for use as a material in high-end switches, connectors, relays, and other electronic parts.
Table 1. C1990 chemical composition (%)
| Ti | Cu + Ti | |
|---|---|---|
| Standard composition | 2.90~3.50 | ≧ 99.5 |
Table 2. Physical properties of C1990
| Electrical conductivity | 12 | %IACS (@20℃) |
|---|---|---|
| Specific resistance | 144 | nΩ·m (@20℃) |
| Thermal conductivity | 54 | W/mK |
| Linear expansion coefficient | 18.6 | ×10-6/K (20 to 300℃) |
| Modulus of elasticity | 127 | GPa |
| Density | 8.70 | g/cm3 |
Table 3. Mechanical properties of C1990 (specifications)
| Temper | Tensile strength (MPa) |
Yield strength (MPa) |
Elongation (%) |
Vickers hardness (Hv) |
|---|---|---|---|---|
| 1/4H | 735-930 | - | 10min | 250min |
| EH | 885-1080 | 800-900 | 5min | 280min |
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