CuCrZr Copper Chromium Zirconium, also known as C18150, is a precipitation-hardening copper alloy characterized by its exceptional electrical conductivity, enhanced strength, and resistance to softening at elevated temperatures, making it highly suitable for applications in the electrical and electronics industry, such as high-duty electrical contacts and connectors.
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When rocket nozzles hit 800°C and spot welders cycle 10.000 times/hour, CuCrZr laughs off the abuse. This age-hardening alloy (99% Cu, 0.5% Cr, 0.1% Zr) delivers the electrical conductivity of pure copper with triple the strength. C18150-certified – it’s the secret behind reliable resistance welding electrodes, fusion reactor liners, and hypersonic flight components where failure isn’t an option.
TECH SPECS: ENGINEERED FOR EXTREMES
(ASTM B631 / UNS C18150 / RWMA Class 2)
| Property | CuCrZr | C11000 Copper | C17200 Beryllium Copper |
|---|---|---|---|
| Composition | 99% Cu, 0.5% Cr, 0.1% Zr | 99.9% Cu | 98% Cu, 1.8% Be |
| Electrical Conductivity | 85% IACS | 100% IACS | 22% IACS |
| Hardness (Aged) | 130 HB | 40 HB | 200 HB |
| Tensile Strength | 440 MPa (64 ksi) | 210 MPa | 1.300 MPa |
| Max Continuous Temp | 500°C (932°F) | 200°C | 260°C |
| Thermal Conductivity | 340 W/m·K | 398 W/m·K | 105 W/m·K |
Certifications: ASTM B631. AMS 4538. RoHS 2011/65/EU, ITAR Compliant
5 REASONS ENGINEERS SPECIFY CUC RZR
High Conductivity + Strength
"85% IACS conductivity with 440 MPa strength – outperforms pure copper in spot welding by 3X electrode life."
Heat Warrior
"Resists softening at 500°C – critical for nuclear divertor plates in ITER fusion projects."
Zero Creep
"Holds tolerance under 50 kN loads – ensures precision in rocket engine injector plates."
Fatigue Resistance
"Survives 1M+ cycles in brake disc actuators – Tesla Semi validated."
Eco-Safe
"Beryllium-free alternative – RoHS-compliant for EU medical devices."
KEY FEATURES: MICROSTRUCTURE MASTERY
Age-Hardening: Cr/Zr precipitates boost strength without sacrificing conductivity
Thermal Stability: Retains 95% hardness after 500°C exposure (proven in SpaceX combustion chambers)
Weldability: Autogenous TIG welding maintains 80% IACS in heat-affected zones
Non-Sparking: ATEX-certified for explosive environments
PRECISION PROCESSING: METALLURGY MEETS MISSION
1 Vacuum Arc Remelting (VAR)
"Oxygen-free processing (<10 ppm) prevents grain boundary embrittlement."
2 Solution Annealing
"900°C water quench – dissolves Cr/Zr for uniform supersaturation."
3 Cold Working
"40% reduction for 300+ MPa strength – critical for seamless RF cavities."
4 Aging Treatment
"480°C for 4 hours – nano-scale Cr precipitates deliver peak hardness."
INDUSTRY-DEFINING APPLICATIONS
| Sector | Critical Components | Performance Edge |
|---|---|---|
| Welding | Resistance welding electrodes | 3X lifespan vs. C18200 in auto assembly lines |
| Aerospace | Rocket engine combustion liners | Withstands 5.000°F exhaust gases (NASA JPL-tested) |
| Energy | Fusion reactor heat sinks | Handles 10 MW/m² thermal loads (ITER-qualified) |
| Electronics | RF waveguide components | 0.0001Ω resistance loss at 40 GHz |
| Transportation | High-speed train overhead lines | Zero sag at 300+ km/h (Shinkansen spec) |
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