ThePipingMart Blog Grades AMS 4204 Aluminum Alloy – Composition, Properties and Uses

AMS 4204 Aluminum Alloy – Composition, Properties and Uses

AMS 4204

If you are in the aircraft or aerospace industry, you must have heard of AMS4204. This specification is crucial in the production of various aviation parts and components. But what is AMS 4204, and what are its properties? In this blog post, we will dive into the composition, physical and mechanical properties of AMS4204, its uses, hardness, and heat treatment.

What is AMS 4204?

AMS 4204 (also known as 7010 Aluminum Alloy) can be confusing for those unfamiliar with industrial standards and specifications. To put it simply, AMS 4204 is an aluminium alloy that is commonly used in aircraft construction. This alloy is known for its excellent strength-to-weight ratio, making it a popular choice in aerospace. In addition, AMS4204 is resistant to fatigue and corrosion, which are important factors in ensuring aircraft safety. Understanding the materials that go into building aeroplanes is crucial. AMS 4204 is one of many materials that must meet strict standards to maintain the highest levels of safety and reliability in the aviation industry.

AMS 4204 Composition

AMS 4204 is an aluminium alloy with magnesium, copper, iron, and silicon elements. Its exact composition is as follows: aluminium (96.05-97.82%), magnesium (0.5-1.5%), copper (0.1-0.6%), iron (0.15% max), silicon (0.15% max), and zinc (0.25% max). This composition makes it a lightweight yet strong material perfect for aircraft and aerospace applications.

Element Content (%)
Aluminum, Al 87.8 – 90.6
Zinc, Zn 5.70 – 6.70
Magnesium, Mg 2.10 – 2.60
Copper, Cu 1.50 – 2.0
Iron, Fe 0.15
Zirconium, Zr 0.10 – 0.16
Silicon, Si 0.12
Manganese, Mn 0.10
Titanium, Ti 0.060
Chromium, Cr 0.050
Nickel, Ni 0.050
Other, total 0.15
Other, each 0.050

AMS 4204 Physical Properties

The physical properties of AMS 4204 include a density of 2.82 g/cm3 and a melting point of 582°C. It also has good corrosion resistance and can withstand exposure to harsh environmental conditions.

Physical Properties  Value
Density 2.81 g/cm3
Melting Point 475 °C
Modulus of Elasticity 71 GPa
Thermal Conductivity 150 W/m.K

AMS 4204 Mechanical Properties

AMS 4204 has excellent mechanical properties, including high strength. It has a tensile strength of 494 MPa and a yield strength of 407 MPa. It also has good fatigue resistance and can withstand cyclic loading without cracking or breaking.

Mechanical Properties  Value
Yield Strength 530 MPa
Elongation A50 mm %8
Modulus of Elasticity 71 GPa

AMS 4204 Equivalents

  • AMS 4203
  • AMS 4204
  • AMS 4205

AMS 4204 Use

As previously mentioned, AMS 4204’s primary use is in producing aircraft and aerospace parts and components. These include wing spars, landing gears, and engine mounts. It also manufactures hydraulic tubing, missile parts, and helicopter structural components.

AMS 4204 Hardness

AMS 4204 has a Brinell hardness of 142 HB, making it a relatively hard material. This property can withstand wear and tear and resist deformation, even in harsh operating conditions.

AMS 4204 Heat treatment

AMS 4204 can be heat-treated to increase its strength and hardness. The process involves heating the material to a specific temperature and cooling it slowly. This treatment improves its mechanical properties, making it suitable for high-stress applications.


In conclusion, AMS 4204 material is a crucial material in the aircraft and aerospace industry thanks to its lightweight and robust nature. Its excellent mechanical and physical properties make it ideal for parts and components subjected to high stresses. Understanding its properties and applications can help manufacturers make informed decisions regarding material selection.

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