Alloy 25 Wire TH04 – Premium High‑Strength Copper Alloy (C17200)

Materion Performance Alloys’ Alloy 25 wire provides the highest strength of any 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
Diameter	1.27 - 2 mm

Mechanical

Property	Temperature	Value	Comment
Elastic modulus	23.0 °C	131 GPa
Elongation	23.0 °C	1 %	min.
Tensile strength	23.0 °C	1340 - 1590 MPa
Yield strength Rp0.2	23.0 °C	1240 - 1520 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 precision coil springs and pins for burn-in and test socket contacts and probe pins, computer processor socket contacts, cold headed fasteners, modular jack contacts, woven mesh electromagnetic shielding gaskets and resilient eyeglass frames.

Alloy 25 Wire TH03 (C17200) – High-Strength, High-Conductivity Copper Alloy Alloy 3 (C17510) TB00 Wire – High Strength, Excellent Conductivity & Stress Resistance

Metal