ThePipingMart Blog Grades AMS 4347 Aluminum Alloy – Composition, Properties and Uses

AMS 4347 Aluminum Alloy – Composition, Properties and Uses

AMS 4347

In materials engineering, AMS 4347 is a term that often pops up. This material is widely used in various industries, including aerospace, automotive, and military applications. But what exactly is AMS 4347, and what makes it so special? This blog post will dive deep into AMS 4347 and explore its composition, physical and mechanical properties, uses, hardness, and heat treatment.

What is AMS 4347?

AMS 4347 is a heat-resistant aluminum alloy that has become increasingly popular in the aviation industry. It’s designed to withstand high temperatures and has excellent mechanical properties, making it an ideal material for aircraft engines and other high-temperature applications. This alloy combines aluminum with small amounts of other metals, such as magnesium and zinc, to create a strong, ductile material that can withstand extreme conditions. If you want to learn more about what makes AMS 4347 such unique and valuable material, keep reading for an in-depth look at its various properties and applications.

AMS 4347 Composition

AMS 4347, also known as Aluminum Bronze C63200, is a copper alloy that contains between 5% and 8% of aluminum, 1% nickel, 1% iron, and small amounts of other elements. This alloy is known for its high strength, excellent corrosion, and good wear resistance. It is primarily used in applications where high-stress levels, corrosion, and wear are major concerns.

AMS 4347 Physical Properties

AMS 4347 has a density of 7.75 g/cm³ and a melting point of 1030°C. It has a coefficient of thermal expansion of 17.3 x 10^-6/K and a thermal conductivity of 56 W/mK. This alloy also exhibits good electrical conductivity and is non-magnetic.

AMS 4347 Mechanical Properties

AMS 4347 has excellent mechanical properties, making it a popular choice in many industries. It has a tensile strength of 103 ksi, yield strength of 50 ksi, and an elongation of 15%. This material is also known for its high fatigue strength, making it highly suitable for applications where cyclic loading is common.

AMS 4347 Uses

AMS 4347 is widely used in various aerospace, automotive, and marine applications. It is commonly used in manufacturing bearings, bushings, gears, valves, and pumps, where strong, wear-resistant materials are needed. Due to its excellent corrosion resistance, it is also used in producing marine hardware, such as propellers and shafts.

AMS 4347 Hardness

The hardness of AMS 4347 can be easily controlled by adjusting the heat treatment process. When annealed, this alloy has a Rockwell hardness of B75. However, when heat-treated, it can achieve a Rockwell hardness of B90, making it one of the hardest copper alloys available.

AMS 4347 Heat treatment

Heat treatment plays an important role in determining the mechanical properties of AMS 4347. For optimal performance, this alloy is typically heat-treated at 815°C for several hours and then quenched in water or oil. This heat treatment process enhances the mechanical properties of the alloy, making it stronger and more wear-resistant.


In summary, AMS 4347 is a highly versatile copper alloy with exceptional mechanical and physical properties. Due to its high strength, excellent corrosion and wear resistance, it is widely used in various aerospace, automotive, and marine applications. The hardness and heat treatment of AMS 4347 can be easily controlled, making it a popular choice in applications with the highest performance levels.

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