Alloy 290 UNS Number C17200
Alloy 290 strip from Materion Brush Performance Alloys provides the highest strength of any mill hardened copper beryllium alloy, with electrical conductivity considerably greater than other high strength copper alloys. This alloy features good stress relaxation resistance, high fatigue strength, and is designed for excellent formability.
Markets and Applications for Alloy 290
Board to board contacts
High reliability spring contacts for battery contacts
Audio Jack Contacts
Alloy 290 Chemical Composition
Beryllium – 1.8-2.0%
Nickel – 0.2% min
Nickel, Cobalt and Iron – 0.6% max
Copper – balance
Alloy 290 Physical Properties
Elastic Modulus - 19 x 106 psi (131 Gpa)
Density - 0.302 lb/in3 (8.36 g/cm3)
Poisson's Ratio - 0.3
Relative Magnetic Permeability - <1.01
Electrical Conductivity – 17-26% IACS (9.9-15.1 MS/m)
Thermal Conductivity 70°F / 20°C - 60 BTU/ft•hr•°F (105 W/m•K)
Thermal Conductivity 200°F / 100°C - 75 BTU/ft•hr•°F (130 W/m•K)
Coefficient of Thermal Expansion - 9.7 ppm/°F (17.5 ppm/°C)
Specific Heat (Heat Capacity) 70°F / 20°C - 0.086 BTU/lb•°F (360 J/kg K)
Specific Heat (Heat Capacity) 200°F / 100°C - 0.097 BTU/lb•°F (406 J/kg K)
Melting Range - 1600 - 1800 °F (870 - 980 °C)
Alloy 290 Mechanical Properties
Mechanical properties may vary by product size, form and temper. Please see individual data sheets for values.
Available Forms, Sizes and Tolerances ofAlloy 290
Alloy 290 strip is available in widths ranging from 0.050in to 16in (1.27 mm to 452.7 mm) and in thicknesses ranging from 0.002in to 0.035in (0.05 mm to 0.9 mm). See data sheet for sizes and tolerances.
Applicable Specifications & Standards for Alloy 290
Strip - ASTM B 194
Resources and Related links
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