Titanium Copper Alloy

C1990HC

C1990 (HC) High conductivity titanium copper

Overview

C1990 (HC) is high conductivity titanium copper that maintains the superior mechanical properties of conventional titanium copper (C1990 alloy) while improving electrical conductivity from 13% to 20%. Since the chemical composition is the same as titanium copper alloys C1990 and C1990HP, there is no need for separate management of scrap for recycling.
C1990 (HC) has electrical conductivity, strength, and bend formability similar to beryllium copper (mill-hardened material), along with stress relaxation resistance superior to that of beryllium copper. Well suited to use as a material for electronic parts such as high-end switches, connectors, battery terminals, and jacks, it can be used as an alternative material to beryllium copper (mill-hardened material).

Features

  1. 1.Electrical conductivity (20% IACS) superior to conventional titanium copper
  2. 2.High bend formability along with high strength (Yield strength 900 MPa)
    (MBR/t = Minimum bend radius/Thickness = 0)
    • Typical values at 0.1 mm thickness
  3. 3.Superior stress relaxation resistance (stress relaxation rate 5% at 150℃, 1,000 hours)
  4. 4.High recyclability
    Since the chemical composition is the same as conventional titanium copper alloy C1990, there is no need to manage scrap separately.

Table 1. C1990 (HC) chemical composition (wt%)

  Ti Ti+Cu
Standard composition 2.9~3.5
(3.0 target)
≧99.5
  • Note that all numerical values shown are typical values.

Table 2. Physical properties of C1990 (HC)

Electrical conductivity 20 %IACS(@20℃)
Specific resistance 86 nΩ·m(@20℃)
Thermal conductivity 84 W/mK
Linear expansion coefficient 18.6 ×10-6/K(20 to 450℃)
Modulus of elasticity 127 GPa
Density 8.70 g/cm3
  • Note that all numerical values shown are typical values.

Table 3. Mechanical properties of C1990 (HC)

Temper Tensile strength
(MPa)
Yield strength
(MPa)
Elongation
(%)
Vickers hardness
(Hv)
Remarks
EH
(C1990HC)
950 900 2.0 300 High conductivity alloy
EH
(C1990)
885-1,080 800-900 ≧5.0 300 Conventional alloy
EH
(C1990HP)
885-1,080 820-920 ≧15.0 300 Hyper Series
  • Note that all numerical values shown are typical values.
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