Products / C17200
C17200 Beryllium Copper Strip
C17200 is the highest-strength copper alloy in common use. After age hardening it reaches a tensile strength above 1,300 MPa while keeping useful electrical conductivity, which makes it the standard choice for springs, contacts and shielding that must hold their force over many cycles.
Equivalent designations
| System | Designation |
|---|---|
| UNS | C17200 |
| EN | CuBe2 / CW101C |
| JIS | C1720 |
| GB | QBe2 (TBe2) |
Typical applications
- Connector contacts and terminals
- EMI shielding fingerstock
- Switch and relay springs
- Battery contacts
- Test probes and sockets
Chemical composition (%)
| Element | Content |
|---|---|
| Be | 1.80 – 2.00 |
| Co + Ni | ≥ 0.20 |
| Co + Ni + Fe | ≤ 0.60 |
| Cu | Balance |
Physical properties
| Property | Value |
|---|---|
| Density | 8.25 g/cm³ |
| Elastic modulus | 131 GPa |
| Electrical conductivity, age hardened | 22 – 28 % IACS |
| Melting range | 870 – 980 °C |
Tempers and tensile strength
| Temper | Condition | Tensile strength (MPa) |
|---|---|---|
| A (TB00) | Solution annealed | 410 – 540 |
| 1/4H (TD01) | Quarter hard | 510 – 610 |
| 1/2H (TD02) | Half hard | 580 – 690 |
| H (TD04) | Hard | 690 – 830 |
| AT (TF00) | Annealed, then age hardened | 1130 – 1350 |
| 1/2HT (TH02) | Half hard, then age hardened | 1280 – 1490 |
| HT (TH04) | Hard, then age hardened | 1310 – 1520 |
Values follow the limits of the governing standard. The mill test certificate for each lot states the measured values.
Supply range
| Item | Value |
|---|---|
| Thickness | TO CONFIRM |
| Width | TO CONFIRM |
| Form | Coil, slit to width |
| Minimum order | TO CONFIRM |
| Lead time | TO CONFIRM |
Questions buyers ask
Is C17200 the same as CuBe2 and Alloy 25?
Yes. C17200 is the UNS number, CuBe2 (CW101C) is the EN designation and Alloy 25 is a common trade name for the same composition.
Should I buy mill-hardened or age-hardenable strip?
Age-hardenable tempers (A to H) are formed first and heat treated afterwards, typically around 315 °C for 2 to 3 hours, and give the highest strength. Mill-hardened strip is heat treated at the mill and needs no furnace step after stamping. Tell us the part and we will advise.
What documents come with each shipment?
The original mill test certificate for the heat lot, a packing list with coil numbers, and RoHS and REACH declarations.
Request a quotation
Send us the grade, temper, thickness, width and quantity. We reply within one working day.
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