Beryllium Copper
Beryllium copper (such as C17200) is a precipitation-hardening copper alloy that reaches strength comparable to steel (up to about 1,400 MPa) while keeping good conductivity, and is non-sparking and non-magnetic. It is used for springs, connectors, non-sparking tools and mould inserts.
What it is
Supplied solution annealed (soft) for forming or machining, then age hardened at about 315 °C to high strength. High-conductivity grades (C17510) trade some strength for better conductivity, used in welding electrodes and mould cooling inserts.
Machining and grinding produce beryllium-containing dust, which is a health hazard; work must be done with proper extraction and controls.
Typical applications
- Precision springs and spring contacts
- Electrical connectors and switches
- Non-sparking tools for hazardous areas
- Plastic mould inserts (cooling)
- Bearings and bushes in aerospace
Materials & grades
- C17200 (high strength)
- C17300 (free machining)
- C17510 / C17500 (high conductivity)
Points to consider
- Machining dust requires proper health and safety controls.
- Form or machine in the soft state, then age harden.
- Expensive; use where its unique combination is needed.
- Specify temper and ageing condition.
Frequently asked questions
Why use beryllium copper?
It combines steel-like strength with good conductivity, and is non-sparking and non-magnetic.
Is beryllium copper safe to machine?
The solid metal is safe to handle, but machining dust must be controlled with extraction because beryllium particles are hazardous if inhaled.
What is age hardening?
A low-temperature heat treatment (around 315 °C for C17200) that precipitates particles to raise strength after forming or machining.