What are the advantages and disadvantages of aluminum alloy

What are the advantages and disadvantages of aluminum alloy

Aluminum is an excellent material that brings a lot of valuable qualities to the table. Its unique combination of properties makes it the most popular non-ferrous metal in the world today. And it’s also often compared to the world’s most widely used group of metals(steels).

The pros and cons of aluminum will vary depending on the application you’re using it for.

High strength to weight ratio

Aluminum is a light metal, and its density (2.7g/cm3) is only 1/3 of that of steel (7.874g/cm3).

Pure aluminum is not very strong, with an ultimate tensile strength of about 90 MPa (13 ksi), but higher strength can be obtained by adding alloying elements and tempering the aluminum alloy, but the change in density is very small. One of the strongest aluminum alloys is AA7068-T6, with an ultimate tensile strength of 710 MPa (103 ksi).

Although not as strong as stainless steel, aluminum alloys are known around the world for their higher strength-to-weight ratios due to their extremely low density.

The density of aluminum alloy is 2.64-2.81 g/cm3.

Strong corrosion resistance

Aluminum paperwork a passivating layer on its surface that makes it evidently corrosion-resistant. As a end result, aluminum alloys are very long lasting in numerous humid or moist environments.

Steel is easy to rust in the air or in contact with water, but aluminum alloys will not.

The corrosion resistance of different alloy types is also different. For example, 5052 and 6061 aluminum alloys not only have strong corrosion resistance, but also have strong resistance to seawater and chemical corrosion.

Ductility and hardness

Ductility and hardness are frequently inversely associated. And aluminum is a enormously smooth, ductile metal in comparison to options like hardened tool steel.

Its ductility gives aluminum extremely good formability and bendability. So, it’s easy to work with whilst making extrusions or pressed products. The cease result can be lower processing charges and greater part complexity without risking unfavourable the material.

Even as ductility is top notch, a ductile fabric also has a tendency to break down faster while uncovered to repeated put on pressure. So, if the product could be exposed to excessive friction, hardened metallic or even tungsten carbide might be preferred.

Lower melting point

Melting point of aluminum is far lower than steel and titanium. It also softens at a lower temperature than many metals. That’s why procedures like aluminum extrusion require a highly small amount of energy to shape it.

At the turn aspect, this also way aluminum is unsuitable for many excessive-temperature provider programs. However if enough cooling is available, aluminum’s high thermal conductivity allows it to transport warmness unexpectedly far from the heat supply to keep integrity.

Thermal Conductivity

Aluminum’s excessive thermal conductivity makes it a staple of many thermal control and warmth exchange systems. But its thermal conductivity is actually approximately forty% lower than copper’s. As such, copper is a more conductive heat sink.

That stated, aluminum is a good deal lighter and less expensive than copper. So in maximum instances, product designers opt for an aluminum heat sink or warmness exchanger to save fee and weight.

Electrical Conductivity

Engineers sometimes find themselves evaluating the electrical conductivity of aluminum and copper. And even as aluminum is only about 39% as conductive as copper, it is a good deal lighter and cheaper.

It’s far a popular consideration for lots electric programs, which includes high-voltage transmission strains. Keep in thoughts, although, that some aluminum finishes can impact conductivity.

Other pros and cons

Surface treatment process, aluminum alloy can use powder coating and anodizing process to change color;

Aluminum alloy is not as strong as stainless steel, but its density is lower;

The conductivity of aluminum alloy is not as good as that of copper, but the price of aluminum alloy is lower than that of copper;

Aluminum alloys are not as ductile as gold and silver, but aluminum is the most abundant metallic element on Earth;

When choosing a metal material, it is necessary to weigh the performance of the metal, the product demand, and the cost of the metal in many ways. Similar problems will also occur in different alloys in aluminum alloys. Therefore, when choosing a metal material, we must weigh many aspects and choose the most suitable metallic material.