About C17300 Leaded Beryllium Copper
Cube2Pb--C17300 (CDA 173) Leaded Beryllium Copper is a high-performance alloy that closely resembles the leaded version C17200. It offers excellent mechanical strength after heat treatment, making it ideal for demanding applications. The addition of a small amount of lead enhances its machinability, allowing for efficient and precise automatic machining processes. This lead content helps in forming fine chips, which reduces tool wear and increases cutting tool longevity.
Common Applications
Electrical: Contact bridges, switch blades, relay components, motor parts, navigation instruments, clips, connectors, and fuse clips.
Fasteners: Washers, screws, bolts, retaining rings, roll pins, lock washers, and other fastening elements.
Industrial: Splined shafts, pump parts, valves, non-sparking safety tools, flexible metal hoses, bushings, mill parts, electrochemical springs, pumps, shafts, springs, bellows, welding equipment, diaphragms, and Bourdon tubes.
Chemical Composition
| Element | ||||||
|---|---|---|---|---|---|---|
| Â | Cu(1,2) | Pb | Al | Be | Co(3) | Si |
| (1) Cu + Sum of Named Elements 99.5% min. (2) Cu value includes Ag. (3) Ni + Co 0.20% min.: Ni + Fe + Co 0.6% max. | ||||||
| Min (%) | Â | 0.20 | Â | 1.80 | 0.20 | Â |
| Max (%) | Rem | 0.6 | 0.20 | 2.00 | Â | 0.20 |
Mechanical Properties*
Physical Properties
| (1) In the precipitation hardened condition. | |
| Melting Point - Liquidus°F | 1800 |
|---|---|
| Melting Point - Solidus°F | 1590 |
| Density lb/cu in. at 68°F | 0.298 |
| Specific Gravity | 8.26 |
| Electrical Conductivity% IACS at 68°F | 22(1) |
| Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F | 62 |
| Coefficient of Thermal Expansion 68-572 10â»â¶ per °F (68 – 572°F) | 9.9 |
| Specific Heat Capacity Btu/ lb /°F at 68°F | 0.1 |
| Modulus of Elasticity in Tension ksi | 18500 |
| Modulus of Rigidity ksi | 7300 |
Applicable Specifications
| Rod | ASTM B 196 / B 196 M, MILITARY MIL-C-21657 | NF A 51-114 |
| Wire | ASTM B 197 / B 197 M | NF A 51-114 |
C17300 is widely used in industries requiring both high strength and good machinability. Its unique combination of properties makes it suitable for precision parts that require durability and performance under stress. Whether in electrical systems or industrial machinery, this alloy delivers reliable results. If you're looking for a material that balances strength, conductivity, and ease of manufacturing, C17300 is an excellent choice.
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