What is C17200 Beryllium Copper?
C17200 beryllium copper, commonly called Alloy 25 or BeCu, is one of the highest-strength copper alloys. It combines high strength, good electrical and thermal conductivity, fatigue resistance, corrosion resistance, non-magnetic behavior, and non-sparking performance.
C17200 is typically supplied in solution-treated, cold-worked, or age-hardened conditions. Strength and conductivity depend heavily on temper and heat treatment, so the exact condition must be confirmed before quoting or machining.
Common Names and Cross References
| Name or designation | How it is commonly used |
|---|---|
| C17200 | UNS alloy designation |
| Alloy 25 | Common beryllium copper trade name |
| BeCu | Beryllium copper shorthand |
| Copper beryllium | Alloy family description |
Chemical Composition (%)
| Element | Minimum | Maximum | Nominal |
|---|---|---|---|
| Copper (Cu) | Remainder | Remainder | Balance |
| Beryllium (Be) | 1.80 | 2.00 | - |
| Nickel + Cobalt (Ni + Co) | 0.20 | - | - |
| Aluminum (Al) | - | Trace | - |
| Silicon (Si) | - | Trace | - |
Mechanical, Electrical, and Physical Properties
Properties vary widely by temper and heat treatment. The values below reflect common Alloy 25 datasheet ranges.
| Property | Typical published value |
|---|---|
| Tensile strength | About 165,000-220,000 psi, depending on temper |
| Yield strength | About 145,000-195,000 psi, depending on temper |
| Elongation | About 2-10%, depending on temper |
| Hardness | Up to about HRC 45 when fully heat treated |
| Electrical conductivity | About 22% IACS minimum |
| Thermal conductivity | About 60-62 Btu-ft/(hr-ft2-F) |
| Modulus of elasticity | About 18,500 ksi |
Fabrication and Heat Treatment Notes
| Operation or property | Notes |
|---|---|
| Machining | Good to excellent, depending on condition |
| Age hardening | Commonly used to reach maximum strength |
| Typical aging reference | Around 600 F for 2-3 hours in many datasheets |
| Forming | Best performed before final age hardening |
| Safety | Follow proper controls for beryllium-containing material, especially dust and fumes |
Typical Applications for C17200
- Springs, contacts, connectors, and high-strength conductive components.
- Non-sparking tools and non-magnetic components.
- Bushings, bearings, wear parts, and precision machined components.
- Aerospace, oil and gas, electronics, and industrial equipment parts.
- Components requiring high fatigue strength and stress relaxation resistance.
RFQ Details for C17200 Parts
Send the C17200 or Alloy 25 callout, temper or heat treatment condition, conductivity and hardness requirements, finished dimensions, quantity, and drawings. If the application needs high conductivity with less strength, compare with C18200 chromium copper.
Available Forms
Available Forms and Shapes
Review common product forms for C17200 Beryllium Copper, then send drawings, dimensions, quantity, and finished-part requirements for material and production guidance.
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