ThePipingMart Blog Grades AMS 4046 Aluminum Alloy – Composition, Properties and Uses

AMS 4046 Aluminum Alloy – Composition, Properties and Uses

AMS 4046

AMS 4046 is a type of aluminium alloy highly valued in the aerospace industry due to its excellent properties, strength, lightweight, and durability. It is essential to understand this alloy’s composition, properties, uses, and heat treatment. This blog post will delve deeper into AMS4046 to provide all the necessary details.

What is AMS 4046?

AMS 4046 (also known as Aluminium Alloy 7075) is a widely used specification for aerospace companies that dictates the requirements for aluminium alloy sheet and plate products. This specification ensures that the materials used in aerospace applications meet specific standards for strength, durability, and resistance to corrosion. Manufacturers also use AMS4046 to certify that their products meet the requirements, giving peace of mind to those in the aerospace industry. While it may seem like a small detail, using quality materials like those outlined in AMS 4046 can mean the difference between success and failure in critical aerospace applications.

What Form is AMS 4046 Available at Piping Mart?

  • Pipes
  • Tubing

 AMS 4046 Composition

AMS 4046 is an aluminium alloy comprising aluminium, copper, and magnesium. Its unique composition helps improve the alloy’s thermal conductivity, strength, and durability. Additionally, silicone, iron, and other trace elements, such as manganese and chromium, can enhance their mechanical properties.

Component Elements Properties Metric English Comments
Aluminum, Al 87.1 – 91.4 % 87.1 – 91.4 % As remainder
Chromium, Cr 0.18 – 0.28 % 0.18 – 0.28 %
Copper, Cu 1.2 – 2.0 % 1.2 – 2.0 %
Iron, Fe <= 0.50 % <= 0.50 %
Magnesium, Mg 2.1 – 2.9 % 2.1 – 2.9 %
Manganese, Mn <= 0.30 % <= 0.30 %
Other, each <= 0.05 % <= 0.05 %
Other, total <= 0.15 % <= 0.15 %
Silicon, Si <= 0.40 % <= 0.40 %
Titanium, Ti <= 0.20 % <= 0.20 %
Zinc, Zn 5.1 – 6.1 % 5.1 – 6.1 %

AMS 4046 Physical Properties

AMS 4046 has excellent physical properties set it apart from other aluminium alloys. It has a tensile strength of 48000-62000 psi and a yield strength of 35000-42000 psi. The base system for measuring its hardness is the Brinell scale, which ranges from 155 to 200, depending on the temper.

Physical Properties Metric English Comments
Density 2.81 g/cc 0.102 lb/in³ AA; Typical

AMS 4046 Mechanical Properties

AMS 4046 has impressive mechanical properties, such as superior strength, hardness, and durability. The alloy’s strength is determined by its tensile and yield powers, which allow it to withstand intense strains and retain its shape even under high-stress conditions. It also has high impact resistance, making it ideal for critical applications such as aircraft structures and missile parts.

AMS 4046 Thermal Properties

Thermal Properties Metric English Comments
CTE, linear 21.6 µm/m-°C
@Temperature -50.0 – 20.0 °C
12.0 µin/in-°F
@Temperature -58.0 – 68.0 °F
23.4 µm/m-°C
@Temperature 20.0 – 100 °C
13.0 µin/in-°F
@Temperature 68.0 – 212 °F
23.6 µm/m-°C
@Temperature 20.0 – 100 °C
13.1 µin/in-°F
@Temperature 68.0 – 212 °F
AA; Typical; average over range
24.3 µm/m-°C
@Temperature 20.0 – 200 °C
13.5 µin/in-°F
@Temperature 68.0 – 392 °F
25.2 µm/m-°C
@Temperature 20.0 – 300 °C
14.0 µin/in-°F
@Temperature 68.0 – 572 °F
Specific Heat Capacity 0.960 J/g-°C 0.229 BTU/lb-°F
Thermal Conductivity 130 W/m-K 900 BTU-in/hr-ft²-°F AA; Typical at 77°F
Melting Point 477 – 635.0 °C 890 – 1175 °F AA; Typical range based on typical composition for wrought products >= 1/4 in. thickness. Homogenization may raise the eutectic melting temperature by 20-40°F but usually does not eliminate it.
Solidus 477 °C 890 °F AA; Typical
Liquidus 635.0 °C 1175 °F AA; Typical

AMS 4046 Uses

AMS 4046 is used in various applications, including but not limited to aircraft fittings, missile parts, and intricate mechanical components. Its impressive strength, durability, and resistance to corrosion make it ideal for outdoor applications, especially in harsh environments. Moreover, its lightweight and formability make it an efficient material for fabricating complex shapes and designs.

AMS 4046 Hardness

AMS 4046 has an impressive hardness range between 155 and 200 on the Brinell scale, which varies depending on the temper. The higher the nature, the higher the hardness, and the better the strength and durability properties. The choice of nature depends on the application and the desired strength and hardness.

AMS 4046 Heat treatment

AMS 4046 pipcan be heat treated to increase its mechanical properties, such as strength and hardness. Heat treatment involves heating the alloy to a specific temperature and holding it for a specified time before cooling it in various ways, such as water quenching or air cooling. The choice of heat treatment process and parameters depends on the desired mechanical properties.


AMS 4046 material is a type of aluminium alloy highly valued in the aerospace industry due to its excellent mechanical properties, such as strength, lightweight, and durability. Its unique composition and physical properties make it ideal for aircraft fittings, missile parts, and intricate mechanical components. Additionally, its resistance to corrosion, formability, and heat treatment capabilities make it a versatile material for fabricating complex shapes and designs. Understanding the composition, properties, uses, and heat treatment of AMS 4046 is vital to maximizing its benefits for your specific application.

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