Alloy 25 Strip TH02 (C17200): Premium High‑Strength Copper Alloy with Superior Conductivity

Materion Brush Performance Alloys’ Alloy 25 strip provides the highest strength of any copper alloy, with electrical conductivity considerably greater than other high strength copper alloys. Since it is heat treated after forming, it provides excellent formability and ductility. 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 - 4.77 mm
Width	1.27 - 406.5 mm

Mechanical

Property	Temperature	Value
Elastic modulus	23.0 °C	131 GPa
Elongation	23.0 °C	1 - 8 %
Hardness, Vickers	23.0 °C	373 - 435 [-]
Tensile strength	23.0 °C	1270 - 1490 MPa
Yield strength Rp0.2	23.0 °C	1100 - 1350 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-6 - 7.8E-6 Ω·m
Specific Electrical conductivity		22 - 28 % IACS

Chemical properties

Property	Value	Comment
Beryllium	1.8 - 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 pressure sensor bellows, burn-in and test socket contacts, computer processor socket contacts, and electromagnetic shielding gaskets.

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Metal