ThePipingMart Blog Grades AMS 4089 Aluminum Alloy –  Composition, Properties and Uses

AMS 4089 Aluminum Alloy –  Composition, Properties and Uses

AMS 4089 Aluminum Alloy

Each type of alloy has specific properties that make it fit for different uses in different industries. AMS 4089 is a high-strength, corrosion-resistant aluminium alloy that has found its way into other applications requiring light weight and excellent heat transfer properties. If you seek to understand the composition of AMS4089, physical and mechanical properties, uses, and heat treatments, then this post will explore that for you.

What is AMS 4089?

AMS 4089 (also known as Aluminium 7475) may sound like a complex code, but it’s simply a specification for a type of aluminium alloy. This particular alloy is commonly used in the aerospace industry due to its strength, durability, and ability to withstand high temperatures. The AMS4089 specification outlines the specific chemical composition and physical properties the alloy must meet to be considered acceptable for aerospace applications. By adhering to this standard, manufacturers can ensure that their products meet the strict quality and safety standards required for use in aircraft. So next time you hear AMS 4089, you know what it means!

AMS 4089 Composition

AMS 4089 is an aluminium alloy of 95.5% Al and small amounts of other elements. The other ingredients are Copper (Cu) at 3.5%, Magnesium (Mg) at 0.6%, Manganese (Mn) at 0.4%, and Chromium (Cr) at 0.15%.

Element Content (%)
Aluminum, Al 90.3
Zinc, Zn 5.7
Magnesium, Mg 2.3
Silicon, Si 1.50
Chromium, Cr 0.22

AMS 4089 Physical properties

AMS 4089 has excellent electrical conductivity, thermal conductivity, and corrosion resistance, making it the ideal material for applications that require these properties. This alloy is also lightweight, with a density of 2.77 g/cm3. It also has a melting point of 545°C and a boiling point of 1380°C.

Properties Metric Imperial
Density 2.6-2.8 g/cm3 0.0939-0.1011 lb/in3
Melting point 546°C 1015°F

AMS 4089 Mechanical Properties

AMS 4089 has a tensile strength of 485 MPa, higher than most other aluminium alloys. This makes it the ultimate choice in applications requiring high mechanical stress and pressure resistance. The yield strength is 455 MPa, and the elongation at break is 4%. Young’s modulus is 71 GPa, and Poisson’s ratio is 0.33.

Properties Metric Imperial
Elastic modulus 70-80 GPa 10152-11603 ksi
Poisson’s ratio 0.33 0.33

AMS 4089 Uses

AMS 4089 is used in various industries where low weight, high strength, excellent heat transfer properties, and corrosion resistance are critical. The aerospace industry uses it to construct aircraft engine components, such as compressor blades, fan blades, and heat exchangers. It is also used to build lighter high-performance cars that require the same heat transfer properties and corrosion resistance. Additionally, it is used to manufacture electronic and computer components like heat sinks that need to transfer heat efficiently.

AMS 4089 Heat treatments

In its annealed condition, AMS 4089 has excellent strength and machinability. However, it undergoes heat treatment to improve its power even further. The solution annealing process involves heating the alloy to 530°C and quenching it in water. This process improves mechanical properties, including high strength, toughness, and fatigue resistance. This heat-treated condition is, known as T6, commonly used in the aerospace industry.


AMS 4089 material is a high-strength aluminium alloy with excellent thermal conductivity, electrical conductivity, and corrosion resistance. It is lightweight and suitable for numerous applications that require materials with these properties. This alloy undergoes heat treatment to further improve its strength and toughness, making it the ideal choice for aerospace, automobile, and electronic and computer components. With an understanding of its composition, physical and mechanical properties use, and heat treatments, it is easy to see why AMS 4089 is a popular material that is essential in several industries.

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