Material datasheet · Cu-Be alloy (precipitation hardening)
Beryllium Copper
UNS C17200 · Solution annealed (TB00) for machining, aged (TF00) to peak strength
Strongest copper alloy. Conductivity + spring + non-sparking. Be-dust handling required.
Chemical composition
Nominal % by weight.
| Element | % by wt |
|---|---|
| Cu | Bal. |
| Be | 1.80–2.00 |
| Co+Ni | ≥0.20 |
Applicable specifications
AMS / ASTM / MIL.
- AMS 4533
- ASTM B196
- QQ-C-530
Age 600°F × 3 hr. Significant strength gain; minimal dimensional change.
Machining guidance
CNC parameters and tooling.
Coated carbide
Beryllium dust is a chronic-toxicity hazard. Wet machining and proper PPE required.
Stock & cost
Forms and Q1 2026 pricing.
- Nickel plate
- Gold plate (electrical contacts)
Typical applications
Where BeCu C172 is the right pick.
- Springs (electrical contacts)
- EDM electrodes
- Non-sparking tools
- Subsea connectors
- Bearings (anti-galling)
Alternative materials
Substitute or upgrade options.
- C194 (lower strength, no Be)
- Phosphor bronze C544 (springs)
- Custom 465 stainless
Digital Machine · Quick-Turn CNC · California
Machine your part in BeCu C172.
Production CNC milling and turning. Confirm material, inspection and documentation requirements when requesting a quote.
Keep exploring
Related tools & references
Speeds, feeds, tooling, and chip strategy.
SFM, RPM, and feed rate for this material.
Compare alloys by strength, weight, temperature, and cost.
Estimate part weight from BeCu C172 stock.
Aerospace specs that call out this alloy.