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Aluminum alloy

6061 Aluminum Alloy And 6063 Aluminum Alloy


Aluminum alloy 6061 and 6063 alloy are widely popular materials in the extrusion industry.

The composition and mechanical properties of each alloy are almost the same, with only slight differences in the added elements. Both contain magnesium to increase strength and silicon to reduce melting temperature; The price difference between the two is basically negligible.

Aluminum alloy composition

6061 aluminum alloy has twice the iron content, and usually contains more copper, chromium and silicon than 6063. On average, the aluminum content of the latter can be up to 3.5% higher.

In order to strengthen their wider application, you can heat treat these two materials.

Key attributes

6061 aluminum alloy is an ideal choice for structural applications and construction projects that require high-strength profiles.

These products can have different material hardness grades according to different heat treatment processes. The Brinell hardness table is a standard measurement system for identifying the hardness of materials. The Brinell hardness value of 6061 aluminum alloy is usually 95, while that of 6063 is 73.

Use of 6061 and 6063 aluminum alloy

  1. Both alloys have a wide range of applications, including transportation components, entertainment products, machinery, equipment and consumer durables. Speaking of durable consumer goods, it can include everything from electrical components, pipes, furniture, appliances, railings, pipes, irrigation system pipes, construction projects, construction products, ships and motor vehicles.
  2. However, each of them performs well under specific circumstances.
  3. 6061 aluminum alloy is the preferred material for structural applications such as brackets, frames, entertainment products, trailers, truck beds, and aerospace.
  4. Professionals usually call 6063 aluminum alloy “architectural because it can be soft anodized and has more aesthetic significance in building and building applications.
  5. Is there a project that is exposed to nature? When high strength is not a major factor, this material can be considered. With its excellent corrosion resistance and weather resistance, this alloy is very suitable for window frames, door frames, sign frames and roofs.
  6. 6063 aluminum alloy is often used in tube extrusion because of its high strength. Furniture, shelves, stairs, pipes and decorations all use this alloy. Although 6061 aluminum alloy is the stronger material in most extrusion configurations, 6063 aluminum alloy is the first choice for this special extrusion.
  7. 6061 aluminum alloy round tubes can be used for products that do not necessarily require maximum strength, such as sleeves, couplers, and frames. However, the extrusion of square tubes does prefer 6063 aluminum alloy because it provides an excellent finish and more corrosion resistance.
  8. Both materials are used in structural and decorative applications. Extruded angle steel uses 6061 aluminum to provide excellent strength for structural projects. Architectural decoration projects choose 6063 aluminum because it provides a more attractive surface.
  9. Extruded channel steel uses 6061 aluminum again because it has excellent strength in structural support, while professionals use 6063 aluminum for more gorgeous applications such as decoration.
Aluminum alloy

What have we learned?

  1. In a word, although their compositions are quite similar, the applications of these alloys are very different.
  2. Due to its excellent strength, most professionals prefer to use 6061 aluminum for structural applications and construction projects, which require high-strength profiles with low melting temperature, low thermal conductivity and low thermal capacity.
  3. Compared with 6063-T6 aluminum, 6061-T6 has higher yield strength and fatigue strength. It has good extrudability, machinability and weldability, as well as good corrosion resistance — although its corrosion resistance is not as good as 6063 aluminum.
  4. If the project requires an extruded alloy with excellent corrosion resistance, good surface quality and easy anodization, 6063 aluminum can be selected.
  5. This material has good machinability, weldability, surface quality and corrosion resistance; Compared with 6061 aluminum, it also has superior extrudability. Professionals usually call 6063 aluminum architectural because it is easier to anodize and create attractive color finishes.
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