Copper (UNS C17410)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations


Copper is not just used in electrical applications but also for engineering applications today.

UNS C17410 is a high copper alloy and is known as beryllium copper. This alloy possesses ductility, heat treatable tempers and mill hardened tempers. C17410 has conductivity of about 50% IACS and moderate strength.

The following datasheet discusses the chemical composition and properties of copper UNS C17410.

Chemical Composition

The chemical composition of copper UNS C17410 is given in the following table.

Element Content (%)
Cobalt, Co 0.35-0.6
Silicon, Si 0.2
Aluminum, Al 0.2
Iron, Fe 0.2
Beryllium, Be 0.15-0.50
Copper, Cu Balance

Physical Properties

The following table discusses the physical properties of copper UNS C17410.

Properties Metric Imperial
Density 8.8 g/cm3 0.318 lb/in3
Melting point 1024°C 1875°F

Mechanical Properties

The mechanical properties of copper UNS C17410 are tabulated below.

Properties Metric Imperial
Tensile strength 750 - 900 MPa 109000 - 131000 ksi
Yield strength 650 - 870 MPa 94300 - 126000 ksi
Modulus of elasticity 138 GPa 20000 ksi
Elongation 7.0 - 17 % 7.0 - 17 %
Hardness, Rockwell B 95 - 102 95 - 102
Hardness, Vickers 210 – 278 210 – 278

Thermal Properties

The thermal properties of copper UNS C17410 are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (@20-200°C/68-392°F) 18 µm/m°C 10 µin/in°F
Thermal conductivity 230 W/mK 1600 BTU in/hr.ft².°F

Other Designations

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Equivalent material to UNS C17410 copper alloy is ASTM B768.


Welding - Soldering, brazing, and spot welding techniques are rated as good for this alloy, while gas shielded arc welding, coated metal arc welding, seam welding, and butt welding are rated as fair. It is recommended that oxyacetylene welding is not used.

Heat treatment - The ideal heat treating temperature range for UNS C17410 is between 787 and 1010°C (1450 and 1850° F).

Forging - The preferred hot working temperature range for this alloy is between 649 and 927°C (1200 and1700 °F).

Hot and cold working – Copper UNS C17410 has excellent hot and cold working ability. This alloy is basically available in mill processed and aged condition.


Copper UNS C17410 is used in a wide range of applications that require very high strength and stiffness coupled with good conductivity.

Copper UNS C17410 finds application in:

  • Bearings
  • Plastic molds
  • Welding electrodes
  • Current-carrying springs
  • Precision screw machined parts
  • Corrosion resistant components
  • Connectors for appliances and consumer electronics

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