Titanium Copper Alloy C1990HC

C1990HC Titanium Copper Designed for Springs with High Mechanical Strength



C1990HC is a highly conductive titanium copper alloy. Maintaining the outstanding mechanical properties of our existing titanium copper alloy (C1990), improved from a 13 percent of C1990, it achieves a 20 percent in electrical conductivity. Since the chemical composition is the same as that of the existing titanium copper alloys C1990 and C1900HP, no separate scrap management is needed for recycling.
C1990HC is similar in electrical conductivity, mechanical strength, and formability to beryllium copper (mill-hardened material) and is superior to it in stress relaxation properties. This product is excellently suited for use in advanced switches, connectors, battery terminals, jacks, and other electronic parts, as an alternative to mill-hardened beryllium copper.


  1. Higher electrical conductivity than conventional Titanium Copper alloys (20%IACS)
  2. Excellent mechanical strength and high formability
    (0.2% yeild strength:900MPa, MBR/t = Minimum Bend Radius/Thickness = 0)
  3. Excellent stress relaxation property (Stress relaxation rate:5% @150℃, 1000hr)
  4. Easy recycle: No need to separate C1990HC scrap from C1990 and C1990HP

*All data are typical values.

Table 1. Chemical Composition of C1990HC (%)

  Ti Cu + Ti
Typical 2.90~3.50 ≧ 99.5

Table 2.Physical Properties of C1990HC

Electric conductivity 20 %IACS(@20℃)
Specific resistance 86 nΩ ・ m(@20℃)
Thermal conductivity 84 W/mK
Thermal expansion coefficient 18.6 ×10-6/K(20 to 450℃)
Young's modulus 127 GPa
Density 8.70 g/cm3

Table 3. Mechanical Properties of C1990HC

Temper Tensile Strength
0.2% offset Yield Strength
Vickers Hardness
950 900 2.0 300 Higher
885-1,080 800-900 ≧5.0 300 Conventional
885-1,080 820-920 ≧15.0 300 Hyper