Silafont 36 Chemical Composition: Everything You Need To Know

Grupo Geispen tests Silafont 36, Castasil 37 and Magsimal 59


Silafont 36 is a high-performance aluminum alloy used in various industries, including automotive, aerospace, and marine applications. The chemical composition of Silafont 36 is critical in determining its mechanical and physical properties.

Chemical Composition

Silafont 36 is a silicon-modified aluminum casting alloy that contains 8-10% silicon, 0.2-0.5% magnesium, and 0.2-0.5% copper. Other elements such as iron, manganese, and nickel are present in trace amounts. The alloy also has a maximum zinc content of 0.1% and a maximum titanium content of 0.2%.


Silicon is the primary alloying element in Silafont 36. It improves the fluidity, castability, and machinability of the alloy. Silicon also enhances the strength and wear resistance of the alloy.


Magnesium is a secondary alloying element that provides strength and corrosion resistance to the alloy. It also improves the castability and fluidity of the alloy.


Copper is another secondary alloying element that enhances the strength and corrosion resistance of the alloy. It also improves the thermal conductivity and electrical conductivity of the alloy.


The chemical composition of Silafont 36 results in several mechanical and physical properties. These include:


Silafont 36 has a high strength-to-weight ratio, making it an excellent choice for lightweight applications. Its ultimate tensile strength is between 300-350 MPa.

Corrosion Resistance

Silafont 36 has excellent corrosion resistance, particularly in marine environments. The alloy can withstand exposure to saltwater and other corrosive substances.


Silafont 36 is easy to machine due to its excellent castability and fluidity. The alloy produces high-quality surface finishes and tolerances.


Silafont 36 is a popular choice for various applications, including:


Silafont 36 is commonly used in the automotive industry for engine blocks, cylinder heads, and transmission cases. The alloy’s high strength and corrosion resistance make it ideal for these applications.


Silafont 36 is also used in the aerospace industry for structural components, such as wing and fuselage parts. The alloy’s lightweight and high strength-to-weight ratio make it a popular choice for these applications.


Silafont 36 is an excellent choice for marine applications due to its corrosion resistance. The alloy is commonly used for boat parts, such as propellers, rudders, and hulls.


Silafont 36 is a high-performance aluminum alloy with a unique chemical composition that provides excellent mechanical and physical properties. The alloy’s strength, corrosion resistance, and machinability make it an ideal choice for various applications in the automotive, aerospace, and marine industries.