The best overview of aluminum casting

Aluminum casting

The best overview of aluminum casting

Over time, aluminum has become increasingly popular as cost-effective production techniques have been successfully established. These techniques enable much higher production capacities of aluminum casters compared to other metals.

This has made aluminum casting an increasingly sought-after and lucrative part of the industry for small and large manufacturing companies, who recognize the prevalence and versatility of aluminum and its strong corrosion resistance.

Through continuing advancements, aluminum is quickly boosting to the forefront of valued metallic alloys, thanks partly to the efficient methods used in its extraction and refinement.

Aluminum casting

What is aluminum casting?

Many people are confused about what is an aluminum casting. Overall, aluminum casting is a process where the metal is melted and poured into special molds for parts shapes. Totally useful for manufacturing complex items, this approach involves pouring molten aluminum into a mold of the desired shape and then letting it cool off before removing the cast item.

Aluminum provides superior thermal properties compared to steel or iron, so it’s often used to construct robust components that hold up during extreme conditions. And it’s lighter than other metals and more malleable, allowing designers to add unique features to their designs.

Aluminum casting

What is the best aluminum alloy for casting?

Aluminum alloy casting is a complex yet interesting process. It involves melting the aluminum alloy, pouring it into a mold, and letting it cool. Given its importance, many people are interested in which particular aluminum alloy is best for casting.

When it comes to selecting an aluminum alloy, there are many important factors to consider. First, the desired characteristics of the alloy – including strength, malleability, and overall durability – must be considered.

Other important issues to consider include the cost of the aluminum alloy, current availability, and usage history in similar applications. Researching each potential alloy thoroughly will help you determine which is best for your needs.

Commonly speaking, A380 stands out as the preferred material for which aluminum alloy to choose. A380 Alloy is the most popular alloy for aluminum die casting because of its impressive combination of physical and mechanical properties, which renders it well-suited for most projects.

Aluminum casting

These characteristics include being significantly lighter than other alloys, providing superior strength levels at high temperatures, and having excellent corrosion resistance. A380 is frequently used to reduce production costs due to its easy and consistent machinability, making it the ideal choice for cost-effective yet reliable aluminum casting.

Apart from A380,  there are some alternatives that manufacturers can use.

A383 Aluminum Alloy

The A383 aluminum alloy is an excellent option for die casters producing intricate parts that need specific die-filling characteristics. It offers higher strength when in operation at high temperatures, making it a wise choice when you need a reliable material that won’t crack under the heat.

It may not offer the same properties as A380, but it’s definitely worth considering if you want an alloy that will last under extreme conditions.

A360 Aluminum Alloy

A360 is not the perfect choice for casting purposes– because it’s harder to cast than A380, many die casters tend to avoid it—but its high-temperature strength, ductility, and corrosion resistance make it worthwhile to consider.

When assessing which aluminum alloy to pick, weigh your needs against the difficulty of casting—if the outcome makes your project worth overlooking a more difficult cast, A360 may be the suitable alloy.

In order to compare A360, A380, and A383 aluminum, we made a table to show the difference in a more direct way. The words in red mean its advantage.

Price Pressure tightness Temperature strength Corrosion resistance Durability Precise
A360 Little expensive Highest Highest Highest Normal Normal
A380 Cost-effective High high high Very durable Normal
A383 Normal Normal normal normal normal Very precise

Is aluminum casting cheap?

Many people are concerned about the price of aluminum, like whether it is cheap or not. In fact, aluminum casting is an economical solution in many cases, as it can be a low-cost alternative to machining and other fabrication methods.

This method of producing metal items requires minimal machining and labor, outperforming more expensive options on the market due to its cost-effectiveness. The use of aluminum offers much lighter parts than other metals, allowing for faster maneuverability and easier manufacturing.

Low production volumes and incremental changeovers are often accomplished quickly and efficiently using aluminum casting. Its light weight and corrosion protection make aluminum an attractive choice for many industries. Certain types of aluminum alloys can provide strength and heat resistance when necessary.

Aluminum casting

Aluminum Casting Vs Steel Casting

With advancements in metals Manufacturing, steel and aluminum are two of the top choices for working with metal. Both materials offer significant benefits to manufacturers, as they are both solid and light, providing strength yet reducing the weight of final components, which helps save on costs.

Their corrosion resistance significantly extends the durability of most parts, thus allowing production lines to remain unaffected while also making maintenance a breeze. Thousands of manufacturers across the globe utilize steel and aluminum in their processes, giving them peace of mind that their products will last for years without breaking down or degrading under general usage.

But loads of people are confused with the difference between these two materials. In this part, we shall make an in-depth analysis.


Many production industries have begun transitioning to aluminum as its lightweight yet durable properties offer them many advantages. At only being 2-3 times less dense than steel, aluminum is an ideal choice for lighter products.

This means a product can maintain its quality and strength without adding unnecessary bulk. Whether for car production or even everyday home goods, the ability to incorporate more material with still less weight has become a preferred choice amongst manufacturers.


Steel and aluminum have their respective strengths, but mild steel is still the most popular when it comes to decisive engineering choices. While some aluminum alloys can perform similarly well in terms of strength, steel generally carries an advantage as a reliable material with known properties.

This makes it a logical choice for many engineers when selecting materials for large-scale construction or applications that require considerable strength.

On the other hand, aluminum is often the favored material for projects that prioritize weight savings or require creativity in design to reach strength requirements.

Aluminum casting

Heat Resistance

While steel has a much higher melting temperature of around 2500 degrees F, aluminum begins to soften significantly at 900 degrees F.

This makes steel an invaluable option for high-heat applications such as stovetops and exhaust pipes, where it’s crucial to resist intense temperatures without degradation.

Aluminum casting

Corrosion Resistance

Aluminum is a very effective conductor and is highly corrosion-resistant when exposed to hot and cold climates. However, it does not repel all corrosive elements as well as steel — including acidity and alkalinity. Carbon steel can be attractive, but it is easily corroded and should be painted or sealed for sufficient protection.

The critical advantage of stainless steel in this comparison would naturally be its superior corrosion resistance. Although rust, which primarily consists of iron deposits, isn’t present in stainless steel models or aluminum models, both materials need to be sealed and protected from their surroundings to ensure they remain durable against moisture and other corrosive elements like acids or bases.


Machinability is an essential concept in modern engineering and manufacturing. It refers to the ability of a material to be worked upon by machines such as lathes, drills, saws, and grinders. The machinability of a material depends on several factors, including hardness, wear resistance, ductility, strength, and chip formation.

After the casting has been removed from its mold, machinists often must do additional work to make it a finished product. They bore holes and tap threads into the material, shape critical sections, and remove excess material, ensuring their work is precise and accurate.

The type of material used can impact the amount of time needed for these processes. Steel is often the preferred choice because it offers increased strength and durability.

However, this hard material requires more powerful tools than those commonly used for aluminum, meaning it can take longer to machine and may require more expensive tools. So normally aluminum is the first choice considering the machinability.

Aluminum casting


Steel and aluminum are both excellent materials for casting, with each having its own attributes and abilities. Aluminum’s low melting temperature is easy to work with, while steel’s higher melting temperature provides more rigidity when cast.

Aluminum is well suited to most common casting processes, whereas steel often requires more specialized methods such as lost wax or invested casting. Aluminum’s high malleability makes it ideal for die-casting, in which a pre-designed mold is repeatedly used to create a uniform product.

On the other hand, permanent mold casting can produce strong objects that require less finishing than products made of aluminum because steel molds maintain better structural integrity when cooled in-between uses.

Generally speaking, it comes down to what type of process you are using and your end goals – aluminum will be the better choice if you need castings quickly; however, if strength and longevity are what you’re after, go with steel.


The global metal market is ever-moving and fluid, with costs varying for different alloys depending on the materials used to create them. Steel is widely available and affordable due to its primary raw material, iron ore, which is common enough to make steel a relatively inexpensive resource.

Aluminum, on the other hand, is understood to be more costly because of its principal source, bauxite ore. But both can be recycled and processed into new materials, often at a much lower cost than starting with raw material.

But generally speaking, aluminum tends to be less expensive than stainless steel.

Aluminum Steel
Weight Better
Strength Better
Heat Resistance Better
Machinability Better
Castability Better
Price Cheaper

So, from the analysis above, we can draw the conclusion that when it comes to casting, aluminum and steel are both viable solutions – it just depends on the application. With so many factors to consider, such as cost, weight, strength, and protection from elements, one can quickly become overwhelmed.

Furthermore, some materials are better suited for specific applications than others. To ensure you make the right decision for your product concerning material selection, consulting an expert with experience in casting can prove invaluable.

We will have the knowledge to answer any questions you may have and give guidance on the specifics that pertain to your requirements.

Aluminum casting

More thought about aluminum casting

Aluminum casting can be a complex and time-consuming process, but if done correctly, it is also immensely rewarding. It can have intricate forms and strengths that are seemingly impossible to produce any other way. Metal casting will be an enormously versatile production method with endless possibilities.

If you have any requirements for aluminum castings or steel castings, contact Taiyuan Forging to get the best solutions. Email us at or request a quote in About Us page.