ThePipingMart Blog Grades AMS 4040 Aluminum Alloy – Composition, Properties, and Uses

AMS 4040 Aluminum Alloy – Composition, Properties, and Uses

AMS 4040

When it comes to finding the right metal for specific applications, there are a lot of factors to consider. One of the most important is its composition and physical and mechanical properties. In some cases, such as in the aerospace and defence industries, specific materials are often required due to their unique properties. One such material is AMS4040.

In this blog post, we’ll look at AMS 4040’s composition, physical and mechanical properties, hardness, and heat treatment. By the end of this article, you’ll have a comprehensive understanding of this material and its potential benefits.

What is AMS 4040?

AMS 4036 (also known as Aluminium alloy 2024) is an industry standard for aluminium alloy 2024 sheet metal. This material is versatile and widely used in various applications due to its strength, corrosion resistance, and excellent machinability. From aerospace to automotive industries, AMS4036 is a go-to solution for those needing reliable and durable materials. The standard defines the alloy’s chemical composition, mechanical properties, and heat treatment process, ensuring consistent quality for products manufactured using this material. Whether you are an engineer looking for the right material for your project or a curious learner interested in materials science, AMS4036 is an important topic worth exploring.

What Form is AMS 4034 Available at Piping Mart?

  • Pipes
  • Tubing

AMS 4040 Composition

AMS 4040 is an aluminium alloy part of the AMS 4000 series. It contains roughly 11.5% silicon, 0.5% iron, 0.3% copper, 0.35% manganese, and 0.2% magnesium. The alloy has high corrosion resistance, making it ideal for harsh environments.

% Si Fe Cu Mn Mg Cr Zn Ti Bi Ti+Zr Others Al
Minimum 3,80 0,30 1,20
Maximum 0,50 0,50 4,90 0,90 1,80 0,10 0,25 0,15 0,20 0,15 rest

AMS 4040 Physical properties

Regarding physical properties, AMS 4040 has a density of 2.73 g/cm³, a melting point of 950°C, and a thermal conductivity of 160 W/(mK). Additionally, it has a high strength-to-weight ratio, making it a great material for lightweight applications.

Density (lb / cu. in.) 0.1
Specific Gravity 2.78
Melting Point (Deg F) 950
Modulus of Elasticity Tension 10.6
Modulus of Elasticity Torsion 4

AMS 4040 Mechanical Properties

Mechanically, AMS 4040 has a tensile strength of 324 MPa and a yield strength of 221 MPa. It also has a high fatigue strength, making it suitable for use in parts that will experience repetitive loading, such as aircraft wings.

Temper> Tensile Strength> Yield Strength> Elongation>
KSI> KSI> %>
(annealed) 32 14 12
T3 63 42 15

AMS 4040 Uses

AMS 4040 has many uses due to its unique properties. It can be found in the aerospace, defence, and automotive industries, to name a few. Specifically, it is commonly used to produce aircraft wings, engine mounts, helicopter rotors, and missile components.

AMS 4040 Hardness

Regarding hardness, AMS 4040 has a Rockwell hardness of 35.5 HRB. This relatively low hardness allows the material to be easily formed, but it also may be susceptible to wear in high-stress applications. However, this can be mitigated through proper heat treatment.

AMS 4040 Heat Treatment

Regarding heat treatment, AMS 4040 can be heat-treated to increase strength and hardness. The process involves heating the material to a specific temperature and then cooling it rapidly to produce a tempered state. This heat treatment also adds the benefit of reducing the material’s susceptibility to stress corrosion cracking.


In conclusion, AMS 4040 material is an aluminium alloy with unique properties that make it ideal for use in various applications. It is highly corrosion-resistant, lightweight, and possesses mechanical properties that make it suitable for high-stress environments. It also has a relatively low hardness, making it easy to form, but it can be heat-treated to increase its strength and hardness. Overall, if you’re looking for a material that can withstand harsh conditions and deliver exceptional performance, AMS 4040 is a great option.

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