Aluminum Casting Grades Explained: Which Alloys Are Suitable for Casting?
Cast aluminum grades are specialized alloys designed for mold filling, shrinkage control, and solidification behavior—not…
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Aluminum Casting Services
We provide custom aluminum casting services for industrial and commercial projects, supporting sand casting, gravity casting, and subsequent machining and surface finishing requirements.
• Maximum part size: up to 1000 mm × 1000 mm
• Part weight range: 0.2 kg to 50 kg
• Secondary machining: CNC machining for holes, threads, and critical surfaces
• Surface finishing: polishing, coating, anodizing, and sand blasting
• Tolerance: according to drawing and application requirements
Minhe Aluminum Casting Solutions
Minhe supports aluminum casting projects from early drawing review to final product delivery. With an ISO 9001 quality management system, we focus on stable execution across process coordination, casting production, secondary machining, and surface finishing. For housings, covers, brackets, and other commonly used aluminum cast parts, we pay close attention to dimensional consistency, surface quality, and batch production stability to meet different structural and application requirements.
Common Aluminum Casting Alloys
| Alloy Grade | Key Properties | Typical Applications | Example Parts |
|---|---|---|---|
| A380 (EN AC-46000) | The most widely used die-casting aluminum alloy, offering a very good balance of castability, mechanical strength and pressure tightness. Good fluidity and dimensional stability for thin-wall, complex housings. | High-volume die-cast housings and covers in automotive, industrial equipment, consumer electronics and power tools. | Transmission Housing, Motor Housing, Gearbox Cover, Tool Body |
| A360 (EN AC-43400) | High-strength die-casting alloy with better corrosion resistance and ductility than A380, and very good fluidity for intricate shapes. Suitable for components exposed to more demanding environments. | Precision automotive and machinery housings, enclosures and brackets that require improved toughness and service life. | Pump Housing, Gearbox Case, Hydraulic Manifold, Sensor Housing |
| A413.0 (EN AC-44200) | High-silicon die-casting alloy with excellent fluidity and pressure tightness. Well suited to thin-wall and leak-critical castings, with good machinability after casting. | Oil and fluid handling components, complex thin-wall housings and high-pressure pump or compressor parts. | Oil Pump Body, Compressor Housing, Thin-wall Cover |
| 383 (EN AC-46100) | Modified A380 alloy with improved fluidity and hot tear resistance. Good strength and pressure tightness, ideal for complex multi-cavity die casting production. | Compact automotive and electronic housings, connectors and brackets where thin-wall filling is critical. | ECU Housing, Connector Body, Small Gearbox, Bracket |
| 390 (High-Silicon Alloy) | Very high silicon content for excellent wear resistance, hardness and dimensional stability at elevated temperature. Lower elongation but exceptional performance in sliding and loaded contact surfaces. | Automotive pistons, compressor and pump components, wear-critical sliding or rotating parts under high load. | Piston, Scroll Compressor Plate, Wear Ring, Pump Rotor |
| A356-T6 (EN AC-42100) | Heat-treatable casting alloy combining high strength, good toughness and very good corrosion resistance. Suitable for gravity casting and permanent mold with T6 heat treatment. | Structural safety-critical components in automotive, aerospace and industrial systems that require low weight and high reliability. | Suspension Control Arm, Wheel Hub, Valve Body, Pump Housing |
| A356 (As-Cast) | Castable Al–Si–Mg alloy with good fluidity and moderate strength in the as-cast condition, offering good weldability and corrosion resistance before heat treatment. | Medium-duty structural castings, fluid handling components and general-purpose gravity cast parts. | Manifold Body, Machine Base, Pump Casing, Structural Bracket |
| G-AlSi7Mg (EN AC-42100) | European gravity-casting alloy equivalent to A356, with good strength-to-weight ratio, excellent corrosion resistance and stable mechanical properties after T6 heat treatment. | Gravity or low-pressure cast components in transportation, hydraulics and general machinery for EU projects. | Hydraulic Housing, Pump Body, Structural Frame, Gear Carrier |
Supported Aluminum Casting Processes
Aluminum Die Casting
Suitable for high-volume production of aluminum parts with repeatable geometry, good dimensional consistency, and relatively smooth surface finish. It is commonly used for housings, covers, brackets, and other lightweight components that benefit from efficient production.
Aluminum Gravity Casting
Suitable for aluminum parts that require better mechanical properties, stable wall thickness, and a cleaner structure than sand casting. It is commonly used for valve bodies, pump housings, automotive parts, and medium-volume components with higher strength and surface requirements.
Aluminum Sand Casting
Suitable for larger aluminum castings, lower-volume production, and parts with less demanding surface finish requirements. It is often used when tooling flexibility, part size, or project cost is a more important factor.
Aluminum Casting Applications by Industry
Building Hardware
Aluminum castings are widely used in automotive applications where lighter weight, dimensional consistency, and good machinability are important. Common applications include housings, covers, brackets, and structural parts used in engines, transmission systems, and other vehicle assemblies.
Electronics & Equipment Housings
Aluminum cast parts are commonly used for equipment housings, enclosures, heat-dissipation parts, and lightweight structural components. Their good machinability and relatively low weight make them suitable for industrial equipment, control systems, and electronic assemblies.
Industrial Machinery
Aluminum castings are suitable for machinery housings, support parts, covers, mounting structures, and other functional components used in industrial systems. They are often selected when part weight, machining efficiency, and practical production cost all matter.
Power & Energy Equipment
Aluminum castings are used in power and energy equipment where lower weight, corrosion resistance, and practical machining are important. Common applications include equipment housings, structural supports, covers, and aluminum parts used in utility and energy-related systems.
Consumer & Lightweight Products
Aluminum castings are suitable for lightweight products and equipment parts where appearance, reduced weight, and machining efficiency all matter. They are commonly used for housings, covers, brackets, and other aluminum parts in consumer and light industrial applications.
Post-Processing for Aluminum Castings
Surface Preparation
Removes casting flash, burrs, oxide layers, and surface residue through trimming, deburring, shot blasting, or cleaning, creating a clean and uniform base for machining or finishing.
Heat Treatment
Can improve mechanical properties and dimensional stability through processes such as T5, T6, or other alloy-specific heat treatment methods, depending on casting alloy and application requirements.
Surface Coating
Surface finishing can improve corrosion resistance, appearance, and application-specific performance. Common options may include powder coating, anodizing, painting, or other protective treatments depending on project requirements.
Advantages of Aluminum Casting
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Lightweight Structure
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Good Machinability
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Good Corrosion Resistance
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Suitable for Complex Shapes
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Cost-Effective for Many Applications
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Good Compatibility with Secondary Operations
What Is Aluminum Casting?
Aluminum casting is a manufacturing process in which molten aluminum alloy is poured into a mold to form parts with the required shape. It is suitable for producing a wide range of custom aluminum components and is commonly used for housings, covers, brackets, and other parts that require lower weight, good machinability, and practical corrosion resistance.
Typical Aluminum Casting Parts
Heat Sink Base Plate
Fan Housing
Finned Cooling Plate
Gearbox Cover Housing
Motor End Cover
Mounting Bracket
Quality Assurance for Aluminum Castings
Quality control covers multiple key stages, from material verification and drawing review to final inspection before shipment, helping improve dimensional consistency, surface quality, and production stability for aluminum cast parts.
FAQ – Frequently Asked Questions
Aluminum casting is a manufacturing process where molten aluminum is poured into a mold and solidified into a desired shape. It is widely used for producing complex, lightweight, and high-precision components.
Common casting alloys include ADC12, A356, A380, and ZL101. Each offers different mechanical properties and is selected based on strength, corrosion resistance, and casting method.
- Lightweight
- Corrosion-resistant
- Excellent for complex shapes
- Good thermal conductivity and dimensional stability
The most common methods include:
- Die Casting
- Sand Casting
- Permanent Mold Casting
- Investment Casting (Lost Wax)
- Centrifugal Casting
Yes. Common surface treatments include:
- Anodizing – for corrosion resistance and appearance
- Powder Coating – for durable, decorative finishes
- Painting or Polishing – based on application requirements
Defects like porosity, shrinkage, and inclusions can be minimized by:
- Optimizing mold design
- Using vacuum or pressure-assisted casting
- Employing non-destructive testing (NDT)
- Applying post-treatments such as impregnation
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