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C172
Copper 172 – Beryllium Copper Round Bar
C17200
Overview
Copper 172 (C17200) is a high-strength beryllium copper alloy achieving tensile strengths exceeding 200 ksi with non-sparking properties.
Chemical Composition
| Element | Min | Max |
|---|---|---|
| Copper (Cu) | Remainder (~96.6%) | — |
| Beryllium (Be) | 1.80% | 2.00% |
| Cobalt (Co) | 0.20% | — |
Alloy Designations
UNSC17200
Common NameBeryllium Copper / Alloy 25
AMS4533
Mechanical Properties
Tensile Strength (Age Hardened)195–200 ksi (1,344–1,379 MPa)
Yield Strength (Age Hardened)175–180 ksi (1,207–1,241 MPa)
Elongation (Age Hardened)2–3%
Rockwell Hardness (Age Hardened)C 41–42
Physical Properties
Density8.26 g/cm³
Electrical Conductivity22% IACS
Thermal Conductivity107 W/m·K
Modulus of Elasticity128 GPa (18,500 ksi)
Typical Applications
- Aerospace bushings and bearings
- Oil & gas drilling components
- Springs and spring-loaded contacts
- Non-sparking tools
- Plastic injection mold components
Fabrication & Joining
- Solution anneal: 1,450°F (790°C), water quench
- Age hardening: 600°F (315°C) for 2–3 hours
- Soldering: Good
- Brazing: Good