/Materials selection for CNC machining price.

Materials selection for CNC machining price.

Material selection can impact the CNC machining price.

Material selection is critical in determining the overall functionality and cost of the CNC machined part.

There is a big range of materials machined to be used for parts.
Choosing the right materials and material grade will determine the life time usage and the wear factor.

Examples of most used materials selections.

As a guide here are some of the most popular materials used for CNC machined parts.

  • Alloy Steel
  • Aluminum
  • Brass
  • Copper
  • Plastics
  • Stainless Steel
  • Steel
  • Titanium
  • Tungsten

Each of these materials could have hardness grades and different composition.

Material selection is critical in determining the overall functionality and the cost of the part.

You must choose important material characteristics—hardness, rigidity, chemical resistance, heat treat-ability, and thermal stability.
Just to name a few you will need to nominate this in your quotation request.

Why does the materials selections effect the price?

The price is calculated on the materials cost and the machine time.
Softer metals, like aluminum and brass, and plastics, machine easily with less CNC machining time.
So the price is lower.
Softer materials take less time to remove material, which reduces the time and CNC machining cost.

The cost is higher for harder materials, such as stainless steel and carbon steel.
These materials  must be machined with slower CNC machine spindle R.P.Ms and CNC machine feed rates.

What is an example of the differences for material selections?

Material Selection in time needed to make the custom machined parts.

An example is, generally aluminum will machine about four times faster than carbon steel.
Machining aluminum generally is eight times faster than stainless steel.

Explain more about the different grades.

Material properties for machining

Material grades also has an effects the cost CNC machined parts.

While there is an huge list of grades, a simple example of material material cost differences just for aluminum is as follows.

For a cost comparison example, 6061 aluminum bar stock is approximately half the price per kg than the cost of  aluminum plate.
The cost of 7075 aluminum bar stock can be two to three times the cost of 6061 bar.

This has a huge impact on the end cost of the parts, since it impacts the time needed to machine the parts.

We advise you choose the grade and type of the materials carefully. We are always ready to offer our professional recommendation for materials to assist you to get the most cost effective outcome.