Aluminum 6061 vs 6063

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Aluminum 6061 vs 6063 both belong to the 6000 series aluminum alloy, which means they are primarily alloyed with magnesium and silicon.

6061 and 6063 aluminum introduction

6061 and 6063 aluminum both belong to the 6000 series aluminum alloy, which means they are primarily alloyed with magnesium and silicon. However, there are still some differences in their chemical composition, mechanical properties and application areas.

Aluminum 6061 vs 6063

Aluminum 6061 vs 6063

What is the difference between aluminum 6061 and 6063?

6061 vs 6063 chemical composition

Composition 6061 6063
Aluminum 95.8 – 98.6% <=97.5%
Chromium .04-.35% <=.10%
Copper .15-.4% <=.10%
Iron <=.7% <=.35%
Magnesium .8-1.2% .45-.90%
Manganese <=.15% <=.10%
Silicon .4-.8% <=.2-.6%
Titanium <=.15% <=.10%
Zinc <=.25% <=.10%

Aluminum 6061 vs 6063 thermal conductivity

When comparing the thermal conductivity of Aluminum 6061 and 6063, here are the key points:

Thermal Conductivity

  • – Aluminum 6061: Approximately 167 W/m·K (watts per meter-kelvin)
  • Aluminum 6063: Approximately 201 W/m·K (watts per meter-kelvin)

Summary

  • – 6063 has a higher thermal conductivity than 6061, making it a better choice for applications where efficient heat dissipation is critical, such as in heat sinks or other thermal management components.
  • – 6061 is still a good conductor of heat but is generally chosen for its strength rather than its thermal properties.

The difference in thermal conductivity is mainly due to the slightly different alloy compositions, particularly the silicon and magnesium content.

6061 vs 6063 aluminum strength

Mechanical Properties 6061 Aluminum 6063 Aluminum
Property T4 6061 T6 6061 T4 6063 T6 6063
Brinell Hardness 65 95 46 73
Tensile Strength 35,000 psi 45,000 psi 25,000 psi 35,000
Yield Strength 21,000 psi 40,000 13,000 psi 31,000
Modulus of Elasticity 10,000 ksi 10,000 ksi 10,000 ksi 10,000 ksi
Shear Modulus 3,770 ksi 3,770 ksi 3,740 ksi 3,740 ksi
Shear Strength 24,000 psi 30,000 psi 16,000 psi 22,000
Anodization Reaction Good Good Good Good

Key Differences Between AL 6061 and AL 6063

6061 aluminum is favored for its high strength and versatility, especially in structural applications, while 6063 aluminum is favored for its excellent surface finish and corrosion resistance, making it ideal for architectural uses.

6061 aluminum has a lower melting temperature, lower thermal conductivity, and lower heat capacity.

AL 6061-T6 has higher yield strength and fatigue strength than AL-T6 6063.

It also has poorer corrosion resistance than AL 6063.

6063 aluminum has a higher melting temperature, higher thermal conductivity, and higher heat capacity than AL 6061.

AL 6063 has a better surface finish than AL 6061, making it more suitable for architectural uses.

Application Difference 6061 vs 6063 aluminum

6063 Alloy: Common Applications

If the aluminum products you’re selecting will be on display or exposed to the elements, you’ll want to choose alloy 6063. The alloy’s corrosion resistance and aesthetics make it much more suited for these uses. Given its extrudability, aluminum 6063 is also widely available for all types of applications and in all kinds of shapes.

For example, aluminum pieces for retail displays and organizing are commonly made from 6063, including:

  • T-slot quad tracks – Ideal for framing and structures that will be exposed to elements
  • T-tracks – Ideal for adjustable positioning along the track, such as adjustable work surfaces (e.g., table saws)
  • Z-clips – Ideal for panel construction, such as outdoor signs and panel walls
  • Round tubes – Ideal for piping, such as water irrigation and other externally exposed fluid systems

Because of 6063’s extrudability, it’s compatible with far more shapes that require fine details, such as 90o angles and T-slot quad tracks.

6061 Alloy: Common Applications

6061 is an aluminum alloy of choice if you’re using the product to bear significant weight or require guaranteed reliability and sound structures.

As a result, its extrusions are commonly found as shapes readily suited for making or adding support (e.g., legs for shelving):

  • Round Rods
  • Square Bars
  • Angles

How to choose aluminum 6061 vs 6063

Through the above series of analysis, although 6061 and 6063 aluminum alloys both belong to the 6000 series aluminum alloys, there are still certain differences in performance.

6061 aluminum alloy is preferred in application environments with high strength requirements.

If the product surface effect is required to be high, or stronger corrosion resistance is required, 6063 aluminum alloy can be selected.

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