C17300 Leaded Beryllium Copper is a high-strength, age-hardenable copper alloy that incorporates beryllium and lead, offering superior electrical conductivity, excellent mechanical properties, and good bearing performance, making it a preferred material for electrical contacts, connectors, and precision springs in various industries.
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When Swiss CNC shops battle tool chatter machining aerospace springs, or medical molders face 500.000-cycle wear, C17300 (UNS C17300) delivers. This leaded beryllium copper alloy combines 1.9-2.2% Be with 0.2-0.6% Pb – delivering 22% IACS conductivity while slashing machining costs by 50% vs. pure BeCu. It’s the secret behind Boeing’s flame-resistant connectors and Stryker’s MRI-safe surgical tools.
Technical Parameters
(AMS 4533 / ASTM B196 / RWMA Class 3)
| Property | C17300 | C17200 (BeCu) | C19160 (Ni-Cu) |
|---|---|---|---|
| Composition | 98% Cu, 1.9% Be, 0.5% Pb | 98% Cu, 2% Be | 97% Cu, 2% Ni, 0.5% Pb |
| Tensile Strength | 1.150 MPa (aged) | 1.300 MPa | 290 MPa |
| Conductivity | 22% IACS | 22% IACS | 50% IACS |
| Machinability | 85% | 20% | 90% |
| Thermal Conductivity | 105 W/m·K | 115 W/m·K | 180 W/m·K |
| Hardness (Aged) | 38-42 HRC | 40-44 HRC | 65 HRB |
Certifications: AMS 4533. RoHS Exemption 6c, ITAR, DFARS Compliant
3 Game-Changing Advantages
Machining Revolution
85% machinability – cuts Swiss lathe time for Lockheed Martin’s guidance springs by 55% vs. C17200.
Ultimate Strength + Safety
1.150 MPa strength with non-sparking properties – passes ATEX Zone 0 for Shell refinery tools.
Biocompatibility
ISO 10993-certified – won’t interfere with MRI machines in Medtronic’s neurosurgical instruments.
Critical Features
Free-Machining Lead: Reduces cutting forces 40% (ideal for complex geometries).
Age-Hardenable: Achieves peak hardness (42 HRC) via 320°C/3h aging.
Non-Magnetic: Permeability <1.01 – critical for semiconductor wafer handling.
Corrosion Resistance: Withstands 5.000+ hrs salt spray (ASTM B117).
Production Process: Precision Engineered
1 Vacuum Induction Melting
Argon-shielded melt controls Be/O₂ reaction (<10 ppm inclusions).
2 Continuous Casting
Extruded to rods/strips with ±0.025mm tolerances (AMS 4533).
3 Solution Annealing
790°C rapid quench for maximum Be solubility.
4 Precipitation Aging
320°C for 3 hours – forms nano-scale Be precipitates.
Applications
| Industry | Components | Validation |
|---|---|---|
| Aerospace | Missile guidance springs | 2M+ cycles in Raytheon Patriot systems |
| Medical | MRI-compatible surgical forceps | Zero artifacts in Siemens 7T scanners |
| Energy | Subsea connector pins | 30-year service in BP’s Gulf platforms |
| Electronics | Semiconductor probe pins | <0.5mΩ resistance drift after 10M tests |
| Mold Tooling | Plastic injection cores/cavities | 800.000+ shots at Husky injection molds |
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