Titanium Copper Alloy


High strength, superior stress relaxation resistance


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
Yield strength
Vickers hardness
1/4H 735-930 - 10min 250min
EH 885-1080 800-900 5min 280min
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