Titanium Copper Alloy

C1990 ― High Strength Titanium Copper Alloy

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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