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GuangWei – Expert in Precision Die Casting and Advanced Metal Craftsmanship

Die Cast Heat Sink
Magnesium alloy die-cast heat sinks are precision-engineered thermal management components designed to dissipate heat efficiently while maintaining structural integrity. Made from high-purity magnesium alloys (AZ91D, AM60B, or ZK60), these heat sinks provide excellent thermal conductivity, lightweight design, and corrosion resistance, making them ideal for high-power LEDs, automotive power electronics, industrial control systems, and EV battery modules. Application Fields: Power electronics, LED lighting modules, automotive control units, battery management systems, communication equipment, and industrial machinery requiring high-efficiency thermal management.

Series of Die Cast Heat Sinks

Automotive Power Electronics Heat Sinks
Magnesium die-cast heat sinks for inverters, DC-DC converters, and motor controllers in electric vehicles.
Features: Lightweight, high thermal conductivity, precise mounting for electronic components.
◉ Material: AZ91D / AM60B
◉ Wall thickness: 2.0–5.0 mm
◉ Thermal conductivity: 70–90 W/m·K
◉ Surface treatment: Powder coating or micro-arc oxidation (MAO)
LED Lighting Heat Sinks
Die-cast magnesium heat sinks for high-power streetlights, floodlights, and industrial LED modules.
Features: Maximized surface area for heat dissipation, corrosion-resistant, lightweight for easy installation.
◉ Wall thickness: 1.5–3.0 mm
◉ Surface roughness: Ra ≤0.8 μm
◉ Thermal shock resistance: -40℃ ~ +120℃, 100 cycles
Industrial & Communication Equipment Heat Sinks
Magnesium die-cast heat sinks for power amplifiers, RF modules, and industrial machinery.
Features: EMI shielding, optimized fin geometry for airflow, corrosion resistance.
◉ Tensile strength: ≥180 MPa
◉ Surface treatment: MAO or powder coating
◉ Salt spray resistance: ≥96 h
Battery & Energy Storage Thermal Management Components
Magnesium die-cast plates and housings for EV battery packs, BMS modules, and renewable energy storage inverters.
Features: High heat transfer efficiency, lightweight structural support, durable under vibration and temperature cycles.
◉ Thermal conductivity: 70–95 W/m·K
◉ Wall thickness: 2.0–4.0 mm
◉ Corrosion resistance: MAO coating or anodized layer
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Material and Surface Treatment

1
Material
Standard: AZ91D / AM60B
Optional: ZK60 or WE43 for higher thermal conductivity or structural requirements
2
Surface Treatment
Micro-arc oxidation (MAO)
Powder coating (standard or custom color)
Anodizing (natural or black)
Optional: Electroless nickel plating or custom coating for enhanced corrosion resistance

Product Features

Ultra-lightweight and high-rigidity for optimized thermal performance

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Technical Parameters

Parameter

Specification

Test / Standard

Requirement

Material

AZ91D / AM60B

Density

1.78–1.85 g/cm³

Surface Treatment

MAO / Powder Coating / Anodizing

Salt Spray Test

≥96 h

Wall Thickness

1.5–5.0 mm

Dimensional Accuracy

±0.05 mm

Tensile Strength

≥180–200 MPa

Impact Test

IK07–IK08

Thermal Conductivity

70–95 W/m·K

Thermal Shock Test

-40℃ ~ +120℃, 100 cycles

Surface Roughness

Ra ≤0.8 μm

Flatness

≤0.05 mm per 100 mm

Quality and Certification

All magnesium die-cast heat sinks are produced under ISO9001, IATF16949, and ISO14001 certified systems. Complies with RoHS, REACH, and automotive/industrial standards.

Third-party testing (SGS / TÜV / Intertek) is available for thermal performance, mechanical strength, and corrosion resistance.

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Packaging and Logistics

Packaging: Individual foam tray + bubble wrap + reinforced carton. MOQ: 200-300 pcs per series (negotiable). Lead Time: 20–35 working days depending on mold complexity. Shipping: Air, sea, or express logistics with export-compliant packaging

Frequently Asked Questions
1
Can you customize the fin geometry for different thermal requirements?
Yes, we provide custom fin profiles optimized for airflow and heat dissipation based on thermal simulations or drawings.
2
Are magnesium die-cast heat sinks suitable for automotive applications?
Absolutely, they provide lightweight, high thermal conductivity, and vibration resistance for EVs and power electronics.
3
What surface treatments are available for corrosion protection?
MAO, powder coating, anodizing, and electroless nickel plating are all available.
4
Can the heat sinks integrate mounting holes or assembly features?
Yes, CNC post-processing ensures precise mounting points and integration with other components.
5
What is the maximum size for a magnesium die-cast heat sink?
Our die-casting machines can handle parts up to 30 tons, suitable for medium and large heat sinks or thermal modules.
Get in touch with us
Just leave your email or phone number in the contact form so we can send you a free quote for our wide range of designs!
Guangwei is a professional precision die casting and machining manufacturer, integrating zinc, aluminum, and magnesium alloy die casting, mold design, CNC machining, and surface finishing into a complete one-stop solution.
CONTACT US
  Sales Manager: Man Shee Cheong
  +86-135-8095-1697
  www.guangweitx.com
  No. 3, Shangzhen 2nd Road, Shangjiao Community, Chang’an Town, Dongguan, China.
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