AMS 4021 Aluminum Alloy – Composition, Properties and Uses

AMS4021 is an aluminium alloy that has gained recognition for its outstanding properties, which make it a perfect choice for aerospace and structural applications. Understanding the composition, physical and mechanical properties, use, and heat treatment of AMS 4021. This blog will guide you through everything you need about AMS 4021.

What is AMS 4021?

AMS 4021 (also known as 6061 Aluminum Alloy) is a specification set by the Society of Automotive Engineers (SAE) for aluminium alloy sheets used in aircraft and aerospace applications. This specification details the requirements for the chemical composition, mechanical properties, and other critical characteristics of the aluminium alloy sheets. The AMS4021 standard is crucial for ensuring that the aluminium sheets used in aircraft manufacturing meet strict quality standards and can withstand the extreme conditions of the aerospace environment. The aerospace industry is constantly innovating and pushing boundaries, so the demand for high-quality aluminium alloys that meet AMS4021 specifications continues to be strong.

What Form is AMS 4021 Available at Pipingmart?

• Pipes
• Tubing
• Sheet Plates
• Forged Fittings
• Pipe Fittings

AMS 4021 Composition

AMS4021 is a magnesium alloyed aluminium incorporating trace elements such as copper, manganese, chromium, and zinc. The chemical composition of AMS 4021 ensures that it maintains its exceptional properties, including high strength, excellent toughness, and impressive resistance to stress-corrosion cracking.

AMS 4021 Physical Properties

AMS 4021 has a high density of 2.78g/cm3, with a melting point of 576℃. Its thermal conductivity is 98w/mk, and its thermal expansion is 22.7µm/m℃. AMS 4021’s high-quality corrosion resistance is attributed to its high magnesium content.

AMS 4021 Mechanical Properties

AMS 4021 is known for its incredible mechanical performance, which includes a yield strength of 300 MPa, tensile strength of 420 MPa, and elongation of up to 10%. It can withstand high-stress conditions without losing its form or structural integrity, making it suitable for applications that require strength and durability.

AMS 4021 Equivalents

AMS 4021 Uses

One of the primary uses of AMS 4021 is in aerospace engineering, which is used to design high-quality aircraft parts such as wings, landing gear, and fuselage frameworks. It also finds use in manufacturing military vehicles due to its high strength, lightweight, and durability properties. Additionally, AMS 4021 can be used in automotive and industrial applications requiring high-performance materials.

AMS 4021 Hardness

AMS 4021 is known for its exceptional hardness, attributed to its composition, heat treatment, and alloying elements. It can be heat-treated to achieve a hardness level of up to 115 HB, guaranteeing excellent wear and abrasion resistance.

AMS 4021 Heat Treatment

The heat treatment of AMS 4021 is crucial in enhancing its mechanical and physical properties. The material can be solution treated and aged, which results in improved strength and hardness properties. The duration and temperature of ageing can be controlled to optimize the material’s properties for specialized applications.

Conclusion:

AMS 4021 material is an exceptional magnesium alloyed aluminium that has found use in several applications, notably in the aerospace and automotive industries. It’s chemical composition, physical and mechanical properties, uses, and heat treatment contribute to its high performance and durability. Understanding the properties and potential of AMS 4021 can help you make informed decisions when choosing materials for specialized applications.