Last updated June 2025
Are you selecting the right materials for your CNC machined parts? You may be overlooking cost-effective alternatives that can satisfy part requirements.
Material affects everything from the design to the strength to the function of a part, so it’s important to get it right. Engineers can make educated decisions about material type, but a machine shop with deep knowledge of material properties can be a great resource for determining the ideal material. Form, function, and even availability are all important factors.
When you request a quote from Focused on Machining, our Colorado machine shop will provide expert material recommendations to reduce cost and lead time while ensuring the integrity of your part. But before we tell you how we can help, let’s bust some common myths about material selection.
Busting Common Myths About Materials in Precision Machining
Myth #1: Aluminum isn’t very strong.
There’s a popular misconception that aluminum is a weak material, but there are many different grades and some are incredibly strong! Engineers tend to default to steel (or even titanium for aerospace applications) without realizing that aluminum is a cheaper option that can often get the job done.
Recently, one of our aerospace customers sought out our CNC machining services for a 4130 alloy steel part. After discussing the stresses and forces that would be applied to the part, we determined that an aerospace grade 7075 aluminum would satisfy their part requirements, which saved on cost and cut back lead time for the parts.
Myth #2: 4000 series alloys are only for aerospace applications.
The common assumption in the design world is that 4000 series alloys are only used for aerospace machining. In reality, many of our non-aerospace customers take advantage of the impressive properties of these metals. Across the board, 4000 series alloys have a better strength ratio than carbon steel. They don’t rust easily, and they’re readily available due to the large volume of aerospace work in the United States.
Myth #3: General terms are sufficient when discussing materials.
Did you know that there are well over a dozen different grades of aluminum? There are also many types of titanium, all with varying specifications and properties. Providing the general material type when you request a quote isn’t enough. We’ll want to drill down into the details to make sure we select the specific grade that’s perfect for your part.
Myth #4: 304 stainless steel is always your cheapest option.
Many engineers know they want a 300 series stainless steel for their part and default to 304 because it’s the least expensive off the shelf.
But that upfront material cost can be misleading. 304 is notoriously difficult to machine due to its gummy characteristics, which slow production and drive up costs.
In many cases, 303 is the better choice. It’s less gummy than 304, and can be cut more easily, resulting in lower overall manufacturing costs—even when raw material prices are slightly higher.
Another option is 316 stainless steel, which is ideal for highly corrosive environments or food-grade applications. Though it's harder than 304, its consistent machinability allows us to run jobs efficiently.
If you’re considering a 300 series stainless steel but don’t have a strong preference between grades, ask us! We’re happy to recommend the best fit based on your part’s needs.
Myth #5: Titanium can’t be machined at a reasonable cost.
Titanium has a reputation for being costly and hard to machine—but that can be heavily dependent on the shop you use. With the right tooling, speeds, and experience, titanium machining can be effective and affordable.
Many customers don’t realize titanium also supports outside processes like anodizing, which can enhance its strength and durability, making it an even more versatile option.
How Focused on Machining Helps with Material Selection
There’s no need for guesswork when a skilled CNC machine shop helps you select the right material for your part.
Here’s what you can expect when you work with our team:
Unparalleled knowledge. We know a lot about metal! Our team understands material specifications and properties to make the best recommendation every time.
Years of experience. We’ve made thousands of parts over the years and have experience working with many materials.
Insight into material availability. Why put time and energy into selecting the perfect material only to find out that it’s nearly impossible to procure? Rely on us to help you choose a comparable material that’s easy to find or that can be purchased in the right quantity for your order.
The next time you need a part made, let Focused on Machining help with material selection. Request a quote today and we’ll respond within 24 hours.