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A356 aluminum alloy specification

    adc12 aluminum material properties

    Aluminum alloys are popular materials for manufacturing because of their unique properties. These alloys offer excellent corrosion resistance, low density, and high strength-to-weight ratio. Among different aluminum alloys, A356 is one of the most used materials in various applications.

    In this blog, we will discuss everything related to A356 aluminum alloy specifications, including its composition, mechanical properties, heat treatment, and applications.

    A356 aluminum material properties


    A356 aluminum alloy is a casting alloy that contains various elements for enhancing its mechanical and physical properties. The primary elements in A356 aluminum alloy include silicon, copper, magnesium, iron, manganese, nickel, and titanium.

    Chemical composition

    Mechanical / Physical Properties

    Mechanical Properties

    Yield strength165 MPa
    Tensile strength234 MPa
    Elongation at break3.50%
    Modulus of elasticity72.4 GPa

    Physical Properties

    Density2.67 g/cm3
    Coefficient of thermal expansion23.2 × 10-6 K-1
    Thermal conductivity151 WmK
    Specific heat capacity920 J/kg K

    a356 aluminum alloy specification

    This alloy offers good fatigue strength and wear resistance, making it a perfect choice for critical components in the automotive and aerospace industries. A356 also has excellent corrosion resistance, especially in seawater environments.

    Heat Treatment

    Heat treatment is crucial for improving the mechanical properties of A356 aluminum alloy. There are two types of heat treatment processes for A356; T5 and T6.

    T5 Heat Treatment

    The T5 heat treatment process involves homogenization at 540°C for 10 hours, followed by cooling in air. The specimens are then artificially aged at 170°C for 8 hours, followed by cooling in water. This heat treatment process increases the yield strength and hardness of A356.

    T6 Heat Treatment

    The T6 heat treatment process involves homogenization at 540°C for 10 hours, followed by cooling in air. Specimens are then artificially aged at 170°C for 14 hours, followed by cooling in water. This heat treatment process improves the ultimate tensile strength and elongation of A356.


    A356 aluminum alloy finds use in various applications because of its unique properties. Here are some of the common applications of A356:

    Automotive: A356 is widely used in the automotive industry for manufacturing wheels, engine blocks, cylinder heads, and other structural components due to its high strength and excellent castability.

    Aerospace: A356 is used in the aerospace industry for manufacturing aircraft parts such as landing gear, wing spars, and fuselage frames. Its good corrosion resistance and high strength-to-weight ratio make it an ideal material for aircraft components.

    Marine: A356 is also used in the marine industry for manufacturing different components such as hulls, decks, and masts. It offers excellent corrosion resistance and high strength, making it an ideal material for marine applications.


    A356 aluminum alloy is a popular casting alloy that finds use in various industrial applications. wield used on permanent mold casting, sand casting, squeeze casting and so on. Its unique composition offers excellent mechanical properties, including high strength, low density, and good wear resistance. The heat treatment processes improve these properties further, making it an ideal material for critical components in different industries.

    Knowing the specifications and applications of A356 aluminum alloy can help you select the right material for your project. If you need help with selecting the best material for your application, consult a professional engineer or material scientist.


    1.What is the difference between 6061 and A356 aluminum?

    6061 and A356 are two different types of aluminum alloys. The main difference between the two is their composition. 6061 aluminum contains magnesium and silicon as its major alloying elements, while A356 has a higher content of silicon. Additionally, 6061 is generally stronger and more durable, while A356 is better suited for casting and provides good thermal conductivity.

    2.What is the difference between A356 1 and A356 2?

    A356.1 and A356.2 are two variations of the A356 aluminum alloy, commonly used in casting applications. The main difference between the two is their impurity levels. A356.1 has a lower level of impurities such as iron, copper, and nickel compared to A356.2. This makes A356.1 more suitable for high-performance applications, where consistent mechanical properties and good weldability are important. On the other hand, A356.2 is better suited for general-purpose use, where cost-effectiveness is a major consideration.

    3.What is the difference between aluminum 356 and A356?

    Aluminum 356 and A356 are two different aluminum alloys. The primary difference between the two is that A356 has higher levels of silicon, while Aluminum 356 has a lower silicon content.