Copper Alloy Foil

C1990HP Foil (Titanium Copper Foil)

Overview

  • A Hyper titanium copper foil (model code C1990HP) offering the highest level of strength of any copper alloy.
  • The high strength and excellent spring properties make it an alternative to beryllium copper foil.
  • Higher thickness precision than conventional materials is achieved by optimizing the manufacturing processes.
    This higher thickness precision in turn improves the stability of spring properties.
  • All production processes from metal melting to product-width slitting take place in our Kurami Works, enabling quick delivery time.

Features

  • High strength
  • Excellent spring properties
  • Can be used in place of beryllium copper
  • High thickness precision
  • High reliability
  • Excellent stress relaxation resistance
  • Excellent fatigue properties
  • Full-process production for quick delivery

Manufacturable thickness (typical dimensions)

  • 30µm~100µm
  • Maximum width 450 mm

Typical applications

  • Connectors
  • Spring material in autofocus camera modules for mobile phones

Table 1. C1990HP foil chemical composition (%)

  Ti Cu + Ti
Standard composition 2.90~3.50 ≧ 99.5

Table 2. Physical properties of C1990HP foil

Electrical conductivity 10 %IACS (@20℃)
Specific resistance 172 nΩ·m (@20℃)
Thermal conductivity 47 W/mK
Linear expansion coefficient 18.6 ×10-6/K (20 to 300℃)
Modulus of elasticity XSH : 115 GPa
GSH : 127
Density 8.70 g/cm3

Table 3. Mechanical properties of C1990HP foil
(upper: typical values, lower: specification range)

Temper Tensile strength
(MPa)
Vickers hardness
(Hv)
C1990HP-XSH 1150
1050-1400
340
310-380
C1990HP-GSH 1400
1300-1600
400
350-450

Figure 1. Histogram of thickness distribution in the longitudinal direction (comparison of high thickness precision material with conventional material; thickness 30µm)

Figure 1. Histogram of thickness distribution in the longitudinal direction (comparison of high thickness precision material with conventional material; thickness 30µm)
  • Data obtained by X-ray measurements of thickness at the center of the transverse direction (perpendicular to the rolling direction) of the mother coil, taken every 0.01 seconds for approximately 1,000 meters.
  • The values shown are typical values and are not intended as specifications.

Figure 2. Thickness distribution in the transverse direction (high thickness precision material N = 3, thickness 30 µm)

Figure 2. Thickness distribution in the transverse direction (high thickness precision material N = 3, thickness 30 µm)
  • Thickness distribution was measured in the transverse direction using a direct contact thickness gauge.
  • The values shown are typical values and are not intended as specifications.
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