ThePipingMart Blog Grades AMS 4090 Aluminum Alloy – Composition, Properties and uses.

AMS 4090 Aluminum Alloy – Composition, Properties and uses.

AMS 4090

AMS 4090 is a popular aluminium alloy widely used across various industries. It is primarily known for its outstanding strength and corrosion resistance properties, making it suitable for various engineering applications. But what exactly is AMS 4090? This blog post will explore the composition, physical and mechanical properties, hardness, heat treatment, and uses of AMS 4090.

What is AMS 4090?

AMS 4090 is a term that has gained popularity in recent years. It refers to an adhesive material that is commonly used in aerospace manufacturing. AMS 4090 is an epoxy adhesive designed to withstand extreme temperatures and environmental conditions. This adhesive has become crucial in producing aircraft, spacecraft, and other aerospace vehicles. Its unique properties make it a reliable and efficient solution for bonding various materials, including metals, composites, and plastics. If you’re interested in learning more about the world of aerospace manufacturing, understanding the role of AMS 4090 is a great place to start.

AMS 4090 Composition

AMS 4090 is a high-strength aluminium alloy composed of copper, magnesium, and zinc. It has a chemical composition of 90.6% aluminium, 1.2% copper, 2.1% magnesium, 0.2% manganese, 0.1% silicon, 6.8% zinc, and 0.04% titanium. The alloy is optimized for strength and has excellent corrosion resistance, making it ideal for use in marine environments.

AMS 4090 Physical Properties

AMS 4090 has a density of 2.8 g/cm³ and a melting temperature of 585°C. It also has an electrical conductivity of 34% IACS (International Annealed Copper Standard). The alloy exhibits high thermal conductivity, making it suitable for heat exchangers, radiators, and other heat transfer applications.

AMS 4090 Mechanical Properties

AMS 4090 is a high-strength aluminium alloy that has good mechanical properties. Its tensile strength ranges from 280-345 MPa, and its yield strength is around 215 MPa. The alloy also has a high fatigue strength, making it suitable for aerospace and automotive applications.

AMS 4090 Uses

AMS 4090 is a popular material for use in the aerospace industry, particularly for structural components in aircraft and spacecraft. It is also used in automotive applications such as wheels, engine blocks, and suspension systems. Because of its high strength and corrosion resistance, AMS 4090 is also used in marine applications such as boat hulls, deckhouses, and masts. Other uses include construction, military, and general engineering applications.

AMS 4090 Hardness

AMS 4090 has a Brinell hardness (HB) of 88, which is relatively low compared to other high-strength aluminium alloys. Despite this, the alloy’s mechanical properties make it popular for heavy-duty applications.

AMS 4090 Heat Treatment

AMS 4090 can be heat-treated to improve its strength and hardness. The alloy can be solution heat-treated at a temperature of 470°C for 1 hour, followed by quenching in cold water, and then aged at 160°C for 18 hours. This heat treatment process is known as T6 tempering and improves mechanical properties.


In summary, AMS 4090 is a high-strength aluminium alloy widely used in various industries. Its excellent properties, such as strength, corrosion resistance, and thermal conductivity, make it ideal for aerospace, automotive, marine, and other heavy-duty applications. By understanding the composition, physical and mechanical properties, hardness, and heat treatment of AMS 4090, engineers can make informed decisions when selecting materials for their projects. Whether designing spacecraft components or constructing a boat, AMS 4090 is a reliable and versatile material that can meet your needs.

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