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C7035

Related standardsCDA C70350、 ASTM B422

ApplicationsConnectors, relays, switches, heat dissipation plates, etc.

Corson copper alloy with superior balance of strength and conductivity over that of conventional Corson copper alloys.

Made possible using DOWA’s world-first texture control (TC) process that, C7035 is a Corson copper allow that simultaneously delivers the high strength, stress relaxation property, and good bending workability necessary for small connectors.
It is widely used in connectors that undergo complicated bending and a heat dissipation plates that also have high strength in such electronic devices as smartphones.
It has superior stress relaxation resistance.
As such, its application in connectors and switches for automobiles is growing.
We also offer C7035-TR04 with high conductivity of 60%IACS or higher and C7035-XE and XS tempers that deliver the high strength of 1000N/mm2.
C7035 helps in achieving lower resistance and miniaturization of components.

Chemical composition

[wt%]

Ni Co Si Cu
Typical values 1.5 1.1 0.6 Rem.

Physical properties

Melting point [℃] 1095
Density [g/cm3@20℃] 8.8
Thermal expansion coefficient
[10-6/K@20-300℃]
17.6
Volume resistivity [μΩ・m] 3.4x10-2
(TM04)
Thermal conductivity
[W/m・K@20℃]
200
(TM04)
Young’s modulus [kN/mm2] 120
(TM04)
Poisson’s ratio 0.33
Magnetic properties Non-magnetism

 

Mechanical characteristics and conductivity

Temper Tensile strength
(typical value)
[N/mm2]
0.2 % yield strength
[N/mm2]
Elongation
(typical value)
[%]
Vickers hardness
(typical value)
[HV]
Electrical conductivity
(typical value)
[%IACS]
TR04 640 540-680 4 190 60
TM02 800 675-780 8 245 50
TM04 830 750-850 6 255 50
TM06 875 810-920 4 265 45
XE 980 880-1040 3 295 40
XS 1030 940-1100 2 310 40

Bending workability (W bend, bending width=10mm)

Temper Thickness range
[mm]
MBR/t
Good Way Bad Way
TM02 t ≦ 0.15 0.8 1.0
0.15 < t 1.0 1.5
TM04 t ≦ 0.15 1.5 1.5
0.15 < t 2.0 2.0
TM06 t ≦ 0.15 2.0 2.0
0.15 < t 2.5 2.5

*Please note that the values in the table are reference values and are subject to change without notice.

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