High‑Strength Copper Alloy 290 (TM08 / C17200) – Superior Conductivity & Durability
Materion Performance Alloys, Alloy 290 strip provides the highest strength of any mill hardened copper alloy, with electrical conductivity considerably greater than other high strength copper alloys. This alloy features good stress relaxation resistance and high fatigue strength.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 23.0 °C | 8.36 g/cm³ |
Dimension
| Property | Value |
|---|---|
Thickness | 0.05 - 0.9 mm |
Width | 1.27 - 406.5 mm |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Bendability 90°, bw | 23.0 °C | 3 [-] | for strip with 0.20mm and thinner. |
Bendability 90°, gw | 23.0 °C | 3.5 [-] | for strip with 0.20mm and thinner. |
Elastic modulus | 23.0 °C | 131 GPa | |
Elongation | 23.0 °C | 3 % | min., for strip thicker than 0.10 mm |
Tensile strength | 23.0 °C | 1200 MPa | min. |
Yield strength Rp0.2 | 23.0 °C | 155 - 175 MPa |
Thermal
| Property | Temperature | Value |
|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 1.75E-5 1/K |
Melting point | 870 °C | |
Thermal conductivity | 23.0 °C | 105 W/(m·K) |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical resistivity | 23.0 °C | 6.2E-8 - 1.01E-7 Ω·m |
Specific Electrical conductivity | 17 - 28 % IACS |
Chemical properties
| Property | Value | Comment | |
|---|---|---|---|
Beryllium | 1.8 - 2.2 % | ||
Cobalt | 0.2 % | min. Nickel + Cobalt | |
Copper | Balance | ||
Iron | 0.6 % | max., Nickel + Cobalt + Iron | |
Nickel | 0.2 % | min. Nickel + Cobalt | |
Technological properties
| Property | ||
|---|---|---|
| Application areas | Typical applications include high reliability spring contacts for battery contacts, audio jack contacts, and board to board contacts. | |
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