Aluminum Die Casting Alloy Composition & Properties - What is Die Cast Aluminum | Diecasting-mould

The majority of die castings are made from aluminum alloys, there are lots of different alloys used for aluminum die casting. Here we’ll start with what is die cast aluminum, then go through the common aluminum die casting alloys including A380, A360, 383, etc., and their composition, properties, to find the best aluminum alloy for die casting.

What is Die Cast Aluminum?

Die cast aluminum is a type of aluminum that is melted to a liquid and forced into the mold cavities under high pressure and then hardens to the desired shape, for producing the final die casting aluminum parts. Aluminum die casting uses the non-expendable mold to produce metal castings repeatedly, the die cast aluminum can be fabricated to different dimensions and shapes for a variety of industries, aluminum castings with great accuracy and properties are commonly used in the automotive industry.

Types of Common Aluminum Die Casting Alloys - Best Aluminum Alloy for Die Casting

Die cast aluminum alloy mainly consists of silicon, copper, magnesium, iron, manganese, and zinc. Each element has a different impact on the properties of the alloy. When working with aluminum, you need to choose which type of aluminum alloy to use in the die casting services. Looking at the following die casting aluminum alloys to find the best one for yourself. 

Aluminum Alloy A360 (ANSI/AA A360.0): high corrosion resistance, superior strength at elevated temperatures and good ductility, excellent pressure tightness, and high fluidity, but relatively difficult to cast. 


Aluminum Alloy A380 (ANSI/AA A380.0): the most common die cast aluminum, it offers both great properties and ease of production, this alloy exhibits excellent fluidity, light weight, resistance to corrosion and hot cracking, pressure tightness, dimensional stability, high strength at high temperatures and high electrical conductivity, widely used in tools, frames, electronics, communications equipment, automotive engine, and other parts, transmission and gear cases, furniture, appliances, and more industries. Alloy A380 also has better than average machining characteristics. 


Aluminum Alloy 383 (ANSI/AA 383.0): can be used as the alternative of A380 for intricate components, it has good mechanical properties and improved die casting properties. 


When it comes to the selection of the best aluminum alloy for die casting, other die casting aluminum alloys including AA C443.0, AA A413.0, AA B390.0, AA 518.0, and more. The most popular alloy for aluminum die casting is A380, you can use A383 when producing intricate die casting components that requiring specific die-filling performance, but the castings made from A383 is not as durable as A380. A360 is more difficult to cast than A380, you can check its properties below when considering using it. 

Comparison Between Different Aluminum Die Casting Alloys

Here are two comparison tables of die cast aluminum, the first one indicates the chemical composition of different aluminum die cast alloys. The single values listed below refer to the maximum composition percentages. And in the second comparison chart, you can find varying mechanical and physical properties of common cast aluminum alloys.

Aluminum Die Casting Alloy Composition Chart

Aluminum Die Casting Alloy Properties Chart