Forged Wheels Vs. Cast Wheels

When choosing wheels for your automobile, there is a considerable amount of choice. With the advances in automobile technology, even car wheel technology has evolved considerably, to meet the changing requirements. While we have seen a considerable advancement in wheel design, there has been a change in materials used for manufacturing wheels. Steel, which was once the preferred material, has been replaced by aluminum alloys. Among all types of wheels, you have the option of choosing between forged wheels and cast wheels.

In discussing the difference between forged wheels and cast wheels, we will basically distinguish between the advantages and disadvantages of forging and casting as manufacturing processes. As you will discover, the strength of any metallic product is not just dependent on what it is made of, but also on how it was created.

The internal crystal structure of a metal ultimately decides its strength and other characteristics and this is influenced by the way in which the raw metal is treated. Let us see how forged wheels differ from cast wheels in the following lines.

Forged Wheels Vs. Cast Wheels Comparison

Let us begin by seeing the difference in the manufacturing and internal structure of cast and forged alloy wheels. This will be followed by a comparison between features and cost.

Basic Differences
Cast wheels are created by pouring of liquid or molten metal into specifically designed molds. The liquid metal is then cooled to create solid wheels of requisite dimensions. They are usually made from aluminum alloys. The two prime types of casting processes are gravity casting and low pressure casting.

On the other hand, a forged wheel is sculpted by hammering, application of heat and pressure to give them the required shape. Aluminum alloys or steel may be used in forged wheel manufacture.

Features Comparison
The difference in their manufacturing translates into a difference in their properties. The grains or crystal structures of alloy and forged wheels are different. While the former has uniform grained internal structure, the latter has a cross linked grain structure which makes it more tougher. The densities of both wheel types are comparable, but the forged wheels tend to be lighter as they can achieve greater tensile strength, despite lower mass.

In terms of strength, forged wheels have an edge over cast wheels. This difference in strength is also because of the high grade alloys used in the manufacture of forged wheels, compared to cast wheels. They are better at resisting impacts, compared to cast wheels.

Cost
Cost wise, cast wheels are the cheaper of the two. The higher manufacturing cost of forging add to the forged wheel cost. However, most people prefer to go for forged wheels as they provide greater strength and are more resistant to shocks. It is highly recommended that you use forged wheels for trucks and other heavy vehicles. Low pressure cast wheels are better suited for lighter vehicles.

Forged wheels are a better choice because of their inherent strength compared to cast wheels. If cost is no issue, I would personally opt for forged wheels over cast wheels any time. I think it is worth spending a bit more on something like car wheels as we don't make replacements often. Think long term and choose whichever of the two matches your budget and requirements.