ThePipingMart Blog Grades SAE AMS 2759/3 Alloy – Composition, Properties, and Uses

SAE AMS 2759/3 Alloy – Composition, Properties, and Uses

AMS 2759/3

AMS 2759/3 is a renowned specification for the heat treatment of wrought titanium and titanium alloys. This specification is essential in material processing that involves wrought titanium and its alloys. The standard outlines details about the composition, physical and mechanical properties of AMS 2759/3. It also highlights the suitable heat treatment process for different titanium alloys. This article aims to give you an in-depth understanding of this specification and its applications.

What is AMS 2759/3?

AMS 2759/3 is a specification standard that outlines the guidelines and procedures for the heat treatment of steel parts. It was created by Aerospace Material Specification (AMS) to ensure consistency and quality in the heat treatment process of aviation parts. The standard specifies the minimum requirements for the temperature, time, and cooling rate to ensure the material properties of the parts meet the required specifications. This standard is critical in the aviation industry as it helps to ensure that aircraft parts have the necessary strength and durability to withstand the extreme conditions of flight. Understanding and adhering to this specification is essential in producing safe and reliable aircraft components.

AMS 2759/3 Composition

AMS 2759/3 involves the heat treatment process of titanium alloys. The specification comprises numerous elements in titanium alloys, namely aluminium, molybdenum, vanadium, iron, and others. The elements’ composition depends on the type of titanium alloy and the manufacturer’s requirements.

AMS 2759/3 Physical Properties

The physical properties of AMS 2759/3 titanium alloys are affected by chemical composition, manufacturing process, and heat treatment method. The most important physical properties outlined in the specification are density, thermal, and electrical conductivity. Ti-6AL-4V, for instance, has a density of 4.43 g/cm3, thermal conductivity of 5.5 W /m-K, and electrical conductivity of 7.3% IACS.

AMS 2759/3 Mechanical Properties

Mechanical properties refer to the titanium alloys’ ability to withstand external forces without rupturing or breaking. These properties comprise tensile strength, yield strength, and elongation. The tensile strength of Ti-6AL-4V alloy, for instance, is 880 to 1600 Mpa, while the yield strength is 830 to 1480 Mpa. Elongation, on the other hand, is at 14 to 18%.

AMS 2759/3 Hardness

The hardness property of titanium alloys is vital in determining the material’s ability to withstand abrasion or deformation. The heat treatment process mainly affects the hardness, which can either increase or decrease depending on the method used. AMS 2759/3 outlines the hardness properties of different titanium alloys to meet specific requirements.

AMS 2759/3 Uses

The AMS 2759/3 specification is widely used in the aerospace and medical industry, where high strength, lightness, and corrosion resistance are essential. The specification ensures the final titanium alloy material’s performance meets the standards in the respective industries. Therefore, applying AMS 2759/3 involves a series of processes that ensure the material’s final product is suitable for its intended use.

AMS 2759/3 Heat Treatment

The heat treatment process outlined in AMS 2759/3 material involves annealing, solution treatment, precipitation hardening, and stress relieving. Each heat treatment process has unique characteristics that affect the titanium alloy’s properties. The selection of the heat treatment process depends on the titanium alloy type, intended use, and performance requirements.


AMS 2759/3 specification is vital in the manufacturing processes of titanium alloys for aerospace and medical industries, among others. The specification outlines the composition, physical and mechanical properties, heat treatment, and uses of titanium alloys. Therefore, it is imperative to understand the various heat treatment processes outlined in the specification to ensure the final material product meets its intended use. Understanding AMS 2759/3 is crucial in achieving high-quality and high-performance material products.

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