What is Aluminium-Silicon Alloy

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What is Aluminium Silicon Alloy?

Silicon-aluminum alloy is a binary alloy made of silicon and aluminum, which can maintain the excellent properties of aluminum and silicon and aluminum, respectively.

Silicon is good for metal alloys which are used in casting. Because it increases the melting fluidity, reduces the melting temperature and reduces shrinkage that is associated with the process of solidification and is very inexpensive as an ingredient in raw materials. It also has a lower density (2.34g/cm3), which may help in reducing the weight of casting parts. It has a very low solubility when it comes to aluminum. Silicon precipitates in the form of almost pure silica, which increases wear resistance. It is very rich in silicon and aluminum, and has a mature preparation technology.

Si-Al alloy is a dense material with a density between 2.4g/cm3 to 2.7g/cm3 and its coefficient of thermal expansion (CTE), is between 7-20ppm/. With increasing silicon content, Si-Al alloy’s density and thermal expansion coefficient decreases significantly. Si-Al alloy is a great material with excellent properties, including excellent thermal conductivity and specific strength. It can also be coated with silver, gold or copper. Si-Al alloy is also able to be weldable using substrates and allows for easy precision machining.

Silicon-aluminum alloy is a promising electronic packaging material, particularly in high-tech areas like aerospace technology, space technology and electronics that can be carried around.

What types of Silicon-Aluminum Alloys can you discover?

The important silicon-aluminum alloy in the industry can be classified into four classes:

Hypoeutectic silicon aluminum alloy. The silicon content ranges from 9% to 12 percent.

Eutectic silicon aluminum alloy. The silicon content may range from 11%-13%

Hypereutectic silicon aluminum alloy. The silicon content is between 15% to 20%.

High silicon aluminum alloy. The silicon content is higher than 22%, and the majority being between 25-70 percent. It could even be as high as 80%.

What is the Use of Aluminum-Silicon Aluminium?

High silicon-aluminum alloy material has remarkable tribological properties. It is a great choice as a lightweight, advanced wear-resistant material for all types and sizes of power tools, machine equipment, and other fasteners.

High silicon alloy-aluminum is widely used to line the piston, cylinder, rotor and brake discs in automobile engines.

It can also be used to package circuits with high power.


Optical frame.

Heat sink parts.

Al-Si alloy is a powerful compound deoxidizer. The replacement of pure aluminium in steelmaking can improve the efficiency of the process, as well as clean the iron molten and enhance the quality.

What is the name of the series? Aluminium Silicon Alloy?

4XXX series.

What exactly is Silumin?

Silumin is a group of aluminum alloys that are lightweight and high-strength, made using the combination of aluminum and silicon. Most aluminum-silicon alloys contain between 3 and 25% silicon. Casting is the main application of these alloys however, they are also employed in the rapid process of solidification and powder metalurgical. The alloys employed in powder metallurgy, rather than casting may contain greater amounts of silicon, as high as 50%. Silumin is resistant to corrosion, making it suitable for use in wet environments.

Si-Al Alloy Powder

The price can be influenced by many factors such as the demand and supply in the market, industry trends, the economy’s activity, the market’s sentiment and unexpected happenings.

Contact us via email to request a quote on the latest Si Al alloy powder prices.

Si-Al powder supplier

Nanometer Nano Technology Co. Ltd. is a trusted global manufacturer and supplier of chemical substances. They have more than 12 years’ experience in manufacturing super-high-quality chemicals and nanomaterials such as silicon powder, nitride & graphite powders, zinc sulfide powders, calcium nitride and 3D printing powders.

We can help you if need top-quality Si Al powder.