ThePipingMart Blog Grades AMS 4270 Aluminum Alloy – Composition Properties and Uses

AMS 4270 Aluminum Alloy – Composition Properties and Uses

AMS 4270

Have you heard of AMS 4270? This popular specification in the aerospace industry describes a specific type of aluminium alloy. It is commonly used in manufacturing aerospace components such as landing gear, hydraulic systems, and other critical components that require high strength, excellent corrosion resistance, and good weldability. In this blog post, we will explore AMS 4270 in detail, discussing its composition, physical and mechanical properties, and applications in the aerospace industry, among other topics.

What is AMS 4270?

AMS 4270 (also known as Aluminium Alloy 2024)is a specification that defines the requirements for aluminium alloy 2024 bars, rods, and wire. This specification encompasses the chemical composition, mechanical properties, and heat treatment processes required to produce this particular aluminium product. With its excellent strength, fatigue resistance, and ability to be easily machined, aluminium alloy 2024 is a popular choice for use in aerospace and aircraft manufacturing. AMS4270 ensures this high-quality material meets the requirements for such complex and demanding applications. Overall, AMS 4270 plays a critical role in producing these aluminium products and helps ensure the safety and reliability of aerospace and aviation technology.

What Form Is AMS 4270 Available at Piping Mart?

  • Sheets
  • Plates
  • Tubing

AMS 4270 Composition

AMS 4270 is an aluminium alloy with high levels of magnesium and silicon. It also includes trace amounts of chromium, copper, manganese, titanium, and zinc. This unique composition offers excellent corrosion resistance, strength, and weldability, making it an ideal choice for aerospace components.










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AMS 4270 Physical Properties

AMS 4270 has a density of 2.75 g/cm³ and a melting point of 587-635°C. It also has a high modulus of elasticity, giving it excellent strength and stiffness. Additionally, it offers good thermal conductivity, which helps ensure efficient heat dissipation.

Properties Metric Imperial
Density 2.77 g/cm3 0.10007 lbs/in3
Melting Point 510°C 950°F

AMS 4270 Mechanical Properties

AMS 4270 sheet offers excellent mechanical properties, including high tensile and yield strength and good fatigue resistance. It also has good flexibility, making it easy to form and shape. Furthermore, it offers good machinability, allowing for easy manufacturing and production.

Mechanical Properties Metric English
Ultimate Tensile Strength 469 MPa 68000 psi
Tensile Yield Strength 324 MPa 47000 psi
Shear Strength 283 MPa 41000 psi
Fatigue Strength 138 MPa 20000 psi
Modulus of Elasticity 73.1 GPa 10600 ksi
Shear Modulus 28 GPa 4060 ksi

AMS 4270 Equivalents

AMS Grade European Standard UNS WNR DIN USA
4270 AW-AlCu4Mg1 A92024 3.1355 AlCuMg2 AA2024

AMS 4270 Thermal Properties

Properties Metric Imperial
CTE, linear 68°F 23.2 µm/m-°C 12.9 µin/in-°F
Specific Heat Capacity 0.875 J/g-°C 930 BTU-in/hr-ft²-°F
Thermal Conductivity 121 W/m-K 840 BTU-in/hr-ft²-°F

AMS 4270 Uses

AMS 4270 is commonly used in the manufacturing of aerospace components due to its unique properties. It is often used for landing gear, hydraulic systems, and structural components, among other applications. It is also used in high-stress structural applications such as aircraft frames and wing spars.

AMS 4270 Hardness

AMS 4270 has a Brinell hardness rating of 120 to 150, indicating excellent strength and durability. This hardness offers excellent resistance to wear and tear, making it an ideal choice for high-stress aerospace applications.

AMS 4270 Heat treatment

AMS 4270 can be heat-treated to enhance its mechanical properties. Heat treatment can increase strength and hardness without sacrificing its ductility and toughness. This process involves heating the material to a specific temperature, holding it at that temperature for a period, and then cooling it down slowly to achieve the desired properties.


AMS 4270 is an aluminium alloy with exceptional strength, corrosion resistance, and weldability, making it a popular choice for aerospace components. Its unique composition and mechanical properties make it ideal for high-stress applications such as landing gear, hydraulic systems, and structural components. The heat-treatment process can further enhance its mechanical properties, making it an even more valuable material for aerospace manufacturers. Understanding AMS 4270 and its properties can help aerospace engineers and manufacturers choose the right material for their specific applications.

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