ThePipingMart Blog Grades AMS 4078 Aluminum Alloy – Composition, Properties, and Uses

AMS 4078 Aluminum Alloy – Composition, Properties, and Uses

AMS 4078

AMS4078 is a high-strength aluminium alloy used in various industries, including aerospace and defence. This alloy was specifically designed to cater to the needs of high-end applications and therefore has an impressive set of physical and mechanical properties. It is important to understand these properties and the uses, hardness, and heat treatment of AMS4078 alloy to determine if it is the right material for your next project.

What is AMS 4078?

AMS 4078 (also known as 7075 Aluminum Alloy) is a high-quality metal that is perfect for a range of industrial applications. This metal offers impressive strength and corrosion resistance, making it an ideal choice for use in harsh environments. Engineers and manufacturers alike turn to AMS4078 metal when they need a material that offers durability, reliability, and excellent performance. Whether you are working in the aerospace, automotive, or defence industries, AMS4078 is an excellent choice for your next project. With its superior properties and versatility, it’s no wonder that this metal is so highly regarded in the world of industrial manufacturing.

What Form is AMS 4078 Available at Piping Mart?

  • Pipes
  • Tubing

AMS 4078 Composition

AMS 4078 alloy has a composition that includes aluminium, magnesium, and copper, which gives it its high strength and corrosion resistance properties. The alloy also has small amounts of iron, silicon, and titanium, which enhance its strength and durability.










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AMS 4078 Physical Properties

The physical properties of AMS 4078 alloy include a density of 2.84 g/cm³, a melting point of 490-635°C, and a thermal conductivity of 160 W/m·K. It also has excellent resistance to wear and tear, fatigue, and stress, making it ideal for high-stress applications.

Property Value
Density 2.84 g/cm3
Melting Point 635°C
Thermal Expansion 23.6 ×10−6 /K
Modulus of Elasticity 72 GPa
Thermal Conductivity 130 W/m.K
Electrical Resistivity 0.0515 ×10−6Ω.m

AMS 4078 Mechanical Properties

AMS 4078 alloy has impressive tensile strength and yield strength, with respective values of 470 MPa and 390 MPa. It also has a high elongation percentage of 10%. The alloy is highly resistant to corrosion, and its stress corrosion cracking and intergranular corrosion resistance are also excellent.

Property Value
Proof Stress 440 Min MPa
Tensile Strength 572 MPa
Elongation at 50 mm 4 Min %
Hardness Brinell 155 HB

AMS 4078 Uses

Due to its high strength and durability, AMS 4078 alloy is primarily used in high-stress applications such as aircraft wing skins, fuselage skins, and other structural components. It also manufactures critical components, including hydraulic manifold systems, landing gear, and engine nacelles.

AMS 4078 Hardness

AMS 4078 is a high-strength alloy and therefore has high hardness values. The alloy has a Brinell hardness number of 140, which is impressive, especially considering its light weight.

AMS 4078 Heat Treatment

AMS 4078 belongs to the 6xxx aluminium alloy series and can be heat treated to enhance its mechanical properties significantly. The heat treatment process typically involves a solution annealing treatment, which involves heating the material to a specific temperature, holding it at that temperature for a specific duration, and subsequently quenching it in cold water. This process will result in the formation of a stronger and more ductile material.


AMS 4078 material is an impressive alloy with great physical and mechanical properties, making it ideal for high-stress applications. The alloy’s high strength, corrosion resistance, and hardness values make it an ideal material for the aerospace and defence industries. It is also used in manufacturing critical components such as landing gear systems and engine nacelles. Whether you are designing an aircraft body or any other structural component, AMS 4078 alloy is an excellent choice for its exceptional properties.

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