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UNS C17300 beryllium copper alloys are heat treatable, ductile and can be mill hardened. They offer tensile strength of 1380 MPa (200 ksi). These steels are suitable for applications requiring good conductivity, high strength and stiffness.
This article will give an overview of UNS C17300 beryllium copper alloys.
Chemical Composition
The following table shows the chemical composition of UNS C17300 copper.
| Element | Content (%) |
|---|---|
| Cu | 97.7 |
| Be | 1.9 |
| Co | 0.40 |
The physical properties of UNS C17300 copper are given in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Density (during age hardening, 2% max. decrease in length and 6% max. increase in density) | 8.25 g/cm3 | 0.298 lb/in3 |
| Melting point | 866°C | 1590°F |
The mechanical properties of UNS C17300 copper are tabulated below.
| Properties | Metric | Imperial |
|---|---|---|
| Hardness, Rockwell B | 80.0 - 85.0 | 80.0 - 85.0 |
| Tensile strength, ultimate | 515 - 585 MPa | 74700 - 84800 psi |
| Tensile strength, yield | 275 - 345 MPa | 39900 - 50000 psi |
| Elongation at break | 15.0 - 30.0% | 15.0 - 30.0% |
| Modulus of elasticity | 125 - 130 GPa | 18100 - 18900 ksi |
| Poissons ratio | 0.300 | 0.300 |
| Machinability (UNS C36000 (free-cutting brass) = 100%) | 20% | 20% |
| Shear modulus | 50.0 GPa | 7250 ksi |
Beryllium copper rods find applications in various industries and sectors due to their unique properties. Here are some common applications of beryllium copper rods:
Electrical connectors and switches: Beryllium copper rods are widely used in electrical connectors and switches due to their excellent conductivity and mechanical strength. They provide a reliable electrical connection while withstanding repeated mating and unmating cycles.
Springs and contacts: Beryllium copper rods are commonly used in spring applications where high strength, durability, and good elasticity are required. They are used in springs for various industries, including automotive, aerospace, electronics, and telecommunications. Beryllium copper contacts are also used in electrical connectors and switches to ensure efficient electrical transmission.
Welding and resistance welding electrodes: Beryllium copper rods are used as welding electrodes due to their high thermal conductivity, heat resistance, and resistance to welding spatter. They are commonly employed in resistance welding applications where precise and consistent welding is required.
Bearings and bushings: Beryllium copper rods are utilized in the manufacture of bearings and bushings due to their excellent wear resistance, low friction, and high strength. They provide reliable performance and extended service life in demanding applications, such as automotive, aerospace, and industrial machinery.
Tooling and molds: Beryllium copper rods are used in tooling and mold applications that require high strength, dimensional stability, and resistance to wear and corrosion. They are employed in injection molds, blow molds, and die-casting molds to achieve precise and durable tooling.
Oil and gas industry: Beryllium copper rods find applications in the oil and gas industry, particularly in downhole tooling, where high strength, corrosion resistance, and reliability are crucial. They are used in components such as drill collars, drill bits, and valves.
Aerospace and defense applications: Beryllium copper rods are utilized in various aerospace and defense applications due to their high strength, durability, and resistance to fatigue. They are employed in components such as connectors, springs, contact springs, and electrical contacts.
