How to choose the right aluminum parts for your custom project
There are countless options when selecting metal stock for professional-level CNC machining jobs, but the size, shape and grade of that stock will affect the end result. Professionals and hobbyists alike must understand these details in order to select the right material for their custom parts.
Let's say you are sourcing raw materials to make a custom part. You are interested in 6061 aluminum. Aluminum 6061-T6 is one of the most common materials used in small batch manufacturing. It is used in many industries - aerospace, construction, etc.
At Liangyin, you have nearly a dozen options for shapes, sizes, and cuts of this material. Bar and plate are the most common choices, and understanding the differences is a good place to start your next project.
Considerations when choosing between bar and plate aluminum
What should you consider before purchasing a material? Both bar and plate are highly machinable. They also have similar strength-to-weight ratios. But the following different aspects may affect the success of your project.
Edge conditions
Bars are cut at the end only, usually with a band saw. The natural corners of square bar stock will have a small radius during extrusion and a linear grain on the side of the part perpendicular to the cut edge.
The sheet can be cut to shape using a waterjet or band saw cut at all vertical edges. There are at least two parallel faces in the sheet that will not be touched. These are usually the top and bottom sides of the blank. When ordering material, it is important to consider stock tolerances for both natural and cut edges and to add enough material to properly machine the finished part.
Size Ranges
Material dimensions affect the size of custom parts and the availability of the material. Certain sizes work better under certain conditions, and you must determine the right size range for your part based on the final environment.
For example, bars typically have narrower aspect ratios and their width and thickness dimensions are closer together. This is because the bars are formed by an extrusion process that results in a material bar. Aluminum 6061-T6 square is one of the most widely used aluminum alloys today. It is versatile and is often used for aircraft components, truck frames and various structural components where its high initial tensile strength is an advantage. Square bar can typically be purchased regularly in 6-inch widths, and the length can be more customized as it is often cut from larger stock. Bar stock is also available in cylindrical bars, which are ideal for lathe turning operations.
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