What is Aluminium-Silicon Alloy

If you are looking for high-quality products, please feel free to contact us and send an inquiry, email: brad@ihpa.net

What is Aluminium-Silicon Alloy?

The alloy of silicon-aluminum is made of aluminium and silicon that is able to retain the unique properties of each.

Silicon is excellent in casting metal alloys. Because of its fluidity and melting temperature it can reduce shrinkage and time to solidify, and is cheap as an ingredient. Silicon also has a low density (2.34g/cm3) and could be an advantage in reducing the weight of casting parts. Silicon is extremely soluble in aluminum. It precipitates in almost pure silicon which is very robust and increases wear resistance. The content of silicon and aluminum is quite rich and the technology for preparation of silicon powder is advanced and the cost is low; in addition, it has no pollution on the natural environment, and is safe to the human body.

Si-Al alloy is a dense material with a that ranges from 2.4g/cm3 to 2.5g/cm3, while the coefficient of thermo-expansion (CTE) is between 7 and 20ppm/. Si-Al alloy’s density and thermal expansion factor decreases with increasing silicon content. Si-Al alloy also has outstanding properties, such as excellent thermal conductivity, superior specific strengths and stiffness, good coatings with gold, silver and copper, as well as simple precision cutting.

Silicon-aluminum-alloy is a promising material for electronic packaging, particularly in high-tech areas such as aerospace, space technology as well as mobile electronic devices.

What Kinds of Silicon-Aluminum Alloys Are Available?

The silicon-aluminum industrial alloy is classified into four groups:

Hypoeutectic silicon aluminum alloy. The silicon content varies from 9% – 12%.

Eutectic silica aluminum alloy. The silicon content ranges from 11% to 13 percent.

Hypereutectic silica aluminum alloy. The silicon content ranges from 15% to 20 percent.

High-silicon aluminum alloy. The silicon content in the alloy is much greater than 22%..

What is the function of the alloy Aluminium-Silicon Alloy?

High silicon-aluminum alloy material has excellent tribological properties and is suitable for use as an advanced lightweight wear-resistant material for all types of power tools, transportation machinery and machine tools, as well as special fasteners.

High-silicon-aluminum alloys are widely used in automobile engine cylinder liners, pistons, rotors and brake discs due to its lower specific gravity, its light weight and low thermal expansion coefficient.

It can also serve as a packaging material for high-power integrated circuits.


Frame with optical lenses

Parts of the heat sink

Al-Si alloy is a strong compound that acts as an oxidizer. The process of making steel can be enhanced by replacing pure aluminum with an oxidizer. This will clean the molten steel and increase the quality.

What Series is an Aluminium Silicon Alloy (ASI)?

4XXX series.

What exactly is Silumin and how does it work?

Silumin is a class of lightweight and high strength aluminum alloys that are based on the aluminum-silicon system. The typical aluminum-silicon alloys contain between 3% and 25 percent silicon. They are mostly employed in casting. But, they can also use them in powder metallurgy as well as rapid solidification. The amount of silicon in alloys that are used in powder metallurgy may be greater than that used those used for casting. Silumin is a good choice for use in wet environments because of its high corrosion resistance.

Si-Al Alloy powder price

The market’s demand and supply, the industry trends, the economy’s activity, the mood of the market, and any unexpected events can all influence the price.

For the most current Si-Al powder prices, please send us an inquiry.

Si-Al powder supplier

Tungstenmolybdenummetals Nano Technology Co. Ltd. (Tungstenmolybdenummetals) is a reputable global chemical material supplier and manufacturer with over 12-year-experience in providing super high-quality chemicals and nanomaterials such as silicon powder, nitride powder graphite powder, zinc sulfur, calcium nitride 3D printing powder and many more.

Send us an inquiry If you’re in search of Si-Al alloy powder with excellent quality.