What copper alloys offer the best thermal performance for HVAC applications?
What Copper Alloys Offer the Best Thermal Performance for HVAC Applications?
Importance of Thermal Conductivity in HVAC Copper Components
In HVAC systems, copper components are widely used for heat exchangers, connectors, manifolds, and fittings due to their superior thermal conductivity, corrosion resistance, and formability. The selection of copper alloys directly influences heat transfer efficiency, system lifespan, and reliability. Alloys like C11000, C18200, and C12200 are among the most thermally efficient options for die-cast and machined HVAC components.
Top Copper Alloys for Thermal Performance
C11000 (Electrolytic Tough Pitch Copper)
Thermal conductivity: ~390–400 W/m·K
Purity: ≥99.9% copper
Ideal for heat exchangers, evaporator coils, and high-conductivity busbars
Excellent electrical and thermal transfer properties
C18200 (Chromium Copper)
Thermal conductivity: ~320 W/m·K
Better strength and wear resistance than pure copper
Suitable for high-load thermal environments like condenser terminals and HVAC electrical connectors
Maintains conductivity under mechanical and thermal stress
C12200 (Phosphorous Deoxidized Copper)
Thermal conductivity: ~330 W/m·K
Resistant to hydrogen embrittlement, ideal for brazed HVAC systems
Common in plumbing and thermal tubing exposed to elevated moisture and refrigerants
Comparison of Copper Alloys for HVAC Use
Alloy | Thermal Conductivity (W/m·K) | Strength | HVAC Applications |
|---|---|---|---|
C11000 | 390–400 | Moderate | Heat exchangers, thermal plates, busbars |
C18200 | ~320 | High | Connectors, terminals, high-load zones |
C12200 | ~330 | Moderate | Tubing, brazed joints, corrosion-prone areas |
Industry Standards and Certifications
Neway ensures thermal-grade copper components comply with:
ASTM B124 – Copper and copper-alloy forged and cast parts
ASTM B75 / B88 – Seamless copper tube for HVAC and plumbing
RoHS/REACH – Environmental compliance for HVAC system safety
Customer-Oriented Thermal Copper Casting Solutions
Neway Die Casting provides complete solutions for high-performance copper HVAC components:
Copper Die Casting: Precision casting of thermally conductive copper alloys like C11000 and C18200
Post-Machining Services: CNC finishing for exact thermal interfaces and brazing surfaces
Engineering Design Support: Material selection and thermal optimization consulting for HVAC applications
