Alloy 290 TM03 (C17200) – Premium High‑Strength Copper Alloy for Superior Performance

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	0.5 [-]	for strip with 0.20mm and thinner.
Bendability 90°, gw	23.0 °C	0.5 [-]	for strip with 0.20mm and thinner.
Elastic modulus	23.0 °C	131 GPa
Elongation	23.0 °C	12 %	min., for strip thicker than 0.10 mm
Tensile strength	23.0 °C	930 MPa	min.
Yield strength Rp0.2	23.0 °C	110 - 125 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.

Alloy 290 (C17200) – Ultra‑High Strength Copper Alloy with Superior Conductivity Alloy 290 TM04 (C17200) – Premium High-Strength Copper Alloy

Metal