Aluminium Grades Explained: What is the Difference Between 6082 and 6063?

When you are browsing for aluminium, you will often see numbers like "6082" or "6063" next to the product name. If you aren't a metallurgist, these numbers can be confusing. Does it matter which one you choose?

The short answer is: Yes.

While all aluminium shares the same basic benefits—it is lightweight, doesn't rust, and is easy to recycle—the specific "Grade" or "Alloy" you choose changes how the metal behaves. It affects how strong it is, how easy it is to weld, and even how shiny it looks.

At Aluminium Warehouse, we primarily stock the two most versatile grades in the UK: 6082 and 6063. Here is everything you need to know to pick the right one.

1. Grade 6082 T6: The "Structural Workhorse"

Think of Grade 6082 as the heavy lifter. It is widely known as a "Structural Alloy" and is the most common grade used in the UK for general engineering.

• Key Characteristic: Strength. 6082 has the highest strength of the 6000 series alloys.

• Best For: Machining, drilling, and structural applications where the metal needs to bear weight.

• The Look: It has a slightly duller finish than architectural grades. While it can be polished, it is primarily designed for function over form.

• Common Forms: You will mostly find this grade in our Aluminium Flat Bars, Round Bars, and Plates.

Choose 6082 if: You are building a truss, a trailer chassis, machining parts on a lathe, or any project where strength is the priority.

2. Grade 6063 T6: The "Architectural Artist"

Grade 6063 is often called the "Architectural Alloy." It is slightly softer than 6082, which allows it to be extruded into more complex shapes (like intricate window frames).

• Key Characteristic: Surface Finish. 6063 has a smoother surface grain, making it easier to anodise or powder coat. It looks cleaner and brighter than 6082.

• Best For: Visible joinery, window frames, furniture, and light fabrication where aesthetics matter more than heavy load-bearing.

• The Look: It offers a superior finish, which is why it is the standard for products that will be seen.

• Common Forms: This is the standard grade for our Aluminium Angles, Channels, Box Sections, and Tubes.

Choose 6063 if: You are making a frame for a table, installing trim in a kitchen, building a shop display, or any project where the finish needs to be aesthetically pleasing.

3. What about Grade 1050? (The "Pure" Sheet)

If you are buying Aluminium Sheet (the thin stuff used for cladding or splashbacks), you might see Grade 1050.

This is commercially pure aluminium (99.5% pure). It is not used for structural bars because it is too soft, but that softness makes it excellent for bending. If you need to fold a sheet of metal to a 90-degree angle without it snapping, Grade 1050 is your best friend.

Quick Summary Table

The "T6" Factor

You will often see "T6" added to the end (e.g., 6082-T6). This refers to the Temper—how the metal was heat-treated.

T6 is the most common temper we stock because it offers the best balance of strength and usability. It means the metal has been solution heat-treated and artificially aged to make it stable and strong.

Ready to choose?

Now that you know the difference, you can shop with confidence.

• Need strength? Shop 6082 Round Bar & Plate

• Need style? Shop 6063 Angles & Box Section