ThePipingMart Blog Grades AMS 4344 Aluminum Alloy – Composition, Properties, and Uses

AMS 4344 Aluminum Alloy – Composition, Properties, and Uses

AMS 4344

If you’re working in the aerospace industry, you must have encountered AMS4344. This alloy is vital in various aerospace applications because of its unique physical and mechanical properties. This post will discuss everything you need to know about AMS4344, including its composition, physical and mechanical properties, uses, hardness, and heat treatment.

What is AMS 4344?

AMS 4344 (also known as Aluminum Alloy 7175) is a specification for alloy steel bars, forgings, and tubing used in the aerospace industry. This material must adhere to strict guidelines regarding its chemical composition, mechanical properties, and other characteristics to ensure reliability and safety in flight. AMS4344 is often used in critical aerospace components, such as landing gear, engine, and structural components. Due to its high strength, resistance to corrosion and wear, and overall durability, it is a preferred material for many aerospace engineers and manufacturers. Whether you’re a pilot, an engineer, or simply a curious individual, the intricacies of AMS4344 make for a fascinating study in aerospace.

AMS 4344 Composition

AMS 4344 is an aluminium bronze alloy that contains copper, tin, nickel, and iron. It has good wear and corrosion resistance, making it an ideal material for aerospace applications.

Element Content (%)
Aluminum, Al 90.0
Zinc, Zn 5.6
Magnesium, Mg 2.5
Copper, Cu 1.6
Chromium, Cr 0.23

AMS 4344 Physical Properties

AMS 4344 has a density of 8.8 g/cm3, a melting point of 1030°C, and a thermal conductivity of 45.4 W/m-K. It has excellent thermal and electrical conductivity, making it an ideal choice for heat exchangers and electrical connectors.

Properties Metric Imperial
Density 2.6-2.8 g/cm³ 0.0939-0.1011 lb/in³
Melting point 482°C 900°F

AMS 4344 Mechanical Properties

AMS 4344 has a tensile strength of 655 MPa, yield strength of 345 MPa, and an elongation of 12%. It has excellent flexibility, which means it can withstand deformation without breaking. It also has good fatigue resistance, low magnetic permeability, and high wear resistance.

Properties Metric Imperial
Elastic modulus 70-80 Gpa 10152-11603 ksi
Poisson’s ratio 0.33 0.33

AMS 4344 Uses

AMS 4344 is commonly used in aerospace applications, including bearings, bushings, gears, pumps, and valves. It is also used in marine engineering applications because of its resistance to seawater corrosion.

AMS 4344 Hardness

AMS 4344 has a Brinell hardness ranging from 150 to 190, depending on the heat treatment applied. Heat treatment can be used to adjust the hardness and improve the overall mechanical properties of the alloy.

AMS 4344 Heat treatment

AMS 4344 can be heat-treated to improve its mechanical properties, making it more suitable for specific applications. Solution annealing and quenching can increase strength and toughness, while precipitation hardening can improve wear resistance.


AMS 4344 material is essential for aerospace and marine engineering applications because of its excellent physical and mechanical properties. Its unique combination of wear and corrosion resistance, thermal and electrical conductivity, and flexibility make it an ideal choice for various components in these industries. Heat treatment can improve its hardness and mechanical properties, further broadening its range of uses. If you’re working with aluminium bronze alloys and have yet to look at AMS 4344, it’s worth considering for your next project.

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