Importance of Conductivity in Automotive Cooling Components
In automotive cooling systems, such as radiators, heat exchangers, and motor cooling channels, copper is highly favored due to its excellent thermal conductivity, corrosion resistance, and ease of machining. Suitable copper alloys ensure rapid and efficient heat transfer, system stability under thermal cycling, and compatibility with glycol-based coolants. GNEE recommends high thermal conductivity alloys, such as C11000, C12200, and C18200, for these demanding applications.
Best Copper Alloys for Thermal Conductivity
C11000 – Electrolytic Tough Pitch (ETP) Copper
Thermal conductivity: 390–400 W/m·K
Electrical conductivity: ≥100% IACS
Ideal for heat exchanger plates, electric vehicle cooling plates, and battery cooling modules
Excellent for parts requiring high purity and brazing compatibility
C12200 – Phosphorous Deoxidized Copper
Thermal conductivity: ~330 W/m·K
Resistant to hydrogen embrittlement, suitable for brazed joints
Preferred for tubes, manifolds, and sealed cooling enclosures
Complies with ASTM B75 and B88 for plumbing and HVAC applications
C18200 – Chromium Copper
Thermal conductivity: ~320 W/m·K
Enhanced mechanical strength with good thermal performance
Suitable for thermally and mechanically loaded parts like connectors or pump housings
Stable under pressure and thermal fatigue conditions
Comparison of Copper Alloys for Automotive Cooling
|
Alloy |
Thermal Conductivity |
Key Strength |
Common Applications |
|---|---|---|---|
|
C11000 |
390–400 W/m·K |
Maximum conductivity |
Heat exchanger fins, EV battery plates |
|
C12200 |
~330 W/m·K |
Excellent brazing & ductility |
Radiator tubes, coolant manifolds |
|
C18200 |
~320 W/m·K |
High strength & wear resistance |
Pump components, high-load fittings |
Standards and Validation
ASTM B124 / B75 / B88 – Standards for copper rod, tube, and die castings
ISO 16348 – Copper alloy casting tolerances
SAE J461 / J463 – Copper alloy composition and mechanical property specifications
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why choose our products
We are a leading manufacturer and exporter specializing in a comprehensive range of high-quality copper products, including copper tubes, copper plates/sheets, copper bars, copper rods, copper wires, and copper strips. Our advanced manufacturing facilities are equipped with state-of-the-art continuous casting lines, extrusion presses, cold rolling mills, and drawing machines to ensure precision and consistency. Rigorous quality control is integral to our process, conducted through spectrometers for material verification, tensile testers, eddy current testers, and hydrostatic pressure testers, guaranteeing that all our products meet international standards for performance and durability.
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