Beryllium Bronze C17200
UNS C17200
Description
C17200, also known as Alloy 25, is the most commonly utilized beryllium copper alloy that is notable for exhibiting the highest strength and hardness compared to commercial copper alloys. Its strength and hardness are similar to that of steel. The ultimate tensile and Rockwell hardness properties of C17200 in a peak aged condition are in the 200ksi range and RC45 respectively (electrical conductivity 22% IACS minimum).
General Information
| Items | C17200 |
|---|---|
| Catalog | ACAM-Cu-A001 |
| Density | 8.26 g/cm3 |
| Melting Point | Liquidus: 982 ℃ Solidus: 866 ℃ |
| Electrical Conductivity | 22 % |
Chemical Component
| Cu(1) | Al | Be | Co(2) | Si |
|---|---|---|---|---|
| Balance | 0.20 max | 1.8-2.0 | 0.2-0.6 | 0.2 |
* Unit: %
(1) Cu value includes Ag
(2) Ni + Co 0.2% min, Ni + Fe + Co 0.6% max.
Typical Mechanical Properties
| Items | C17200 |
|---|---|
| Hardness, Rockwell B | 80.0 - 85.0 |
| Tensile Strength, ultimate | 1280-1480 MPa |
| Tensile Strength, yield | 965-1205 MPa |
| Elongation at Break | 15.0 - 30.0% |
| Modulus of Elasticity | 125 - 130 GPa |
| Poisson's Ratio | 0.3 |
| Machinability (UNS C36000 (free-cutting brass) = 100%) | 20% |
| Shear Modulus | 50.0 GPa |
Fabrication Properties
| Technique | Suitability |
|---|---|
| Soldering | Good |
| Brazing | Good |
| Oxyacetylene Welding | Not Recommended |
| Gas Shielded Arc Welding | Good |
| Coated Metal Arc Welding | Good |
| Spot Weld | Good |
| Seam Weld | Fair |
| Butt Weld | Fair |
| Capacity for Being Cold Worked | Good |
| Capacity for Being Hot Formed | Excellent |
| Forgeability Rating | 40 |
| Machinability Rating | 20 |
Common Fabrication Processes
- Blanking
- Drawing
- Tapping
- Turning
- Forming and Bending
- Drilling
Material Forms
Alfa Chemistry offers beryllium bronze C17200 in a variety of forms, including Wire, Rod, Bar, Sheet, Strip, Plate, Tube.
Applications
Beryllium Bronze C17200 is used in a variety of industries from aircraft bushings to oil field drill tooling applications. For example, it can be used in electrical industries like Belleville washers, clips, connectors, switch parts, in machinery field like bearings, bourdon tubes, bushings, pump parts, rolling mill parts, etc.
* Technical data included herein should be used as a guideline only, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice.
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