ThePipingMart Blog Grades SAE AMS-S-6049 Steel – Composition, Properties, and Uses

SAE AMS-S-6049 Steel – Composition, Properties, and Uses


AMS-S-6049 is a specification that pertains to a particular type of steel commonly used in various industries. Engineers and manufacturers rely on this specification to use suitable materials for their applications. This article will delve deep into understanding AMS-S-6049’s composition, physical and mechanical properties, uses, hardness, and heat treatment.

What is AMS-S-6049?

AMS-S-6049 is a crucial specification to detail the production and testing requirements for elastomer seals and gaskets in the aerospace industry. The specification sets out the conditions and parameters the seals and gaskets must meet, ensuring they meet the high standards for use in aircraft engines and other critical aerospace applications. By specifying the material properties, manufacturing process, and testing procedures, AMS-S-6049 helps ensure that these components are reliable, long-lasting, and able to withstand extreme temperatures, pressures, and other demands of aerospace use. In short, AMS-S-6049 is a vital tool in producing safe, reliable aircraft.

AMS-S-6049 Composition

AMS-S-6049 is a low-alloy steel typically containing about 0.15% to 0.25% carbon, 1.35% to 1.85% manganese, 0.80% to 1.20% chromium, and 0.15% to 0.25% molybdenum. It also has a small amount of silicon and other trace elements. This composition makes AMS-S-6049 a strong and durable alloy.

AMS-S-6049 Physical Properties

AMS-S-6049 has a density of approximately 7.85 g/cm³. Its melting point ranges from 1425°C to 1510°C. The coefficient of thermal expansion of AMS-S-6049 is 11.7 μm/m°C. It also has excellent thermal conductivity and electrical conductivity. It is also worth noting that AMS-S-6049 has good corrosion resistance.

AMS-S-6049 Mechanical Properties

AMS-S-6049 possesses excellent mechanical properties. It has a yield strength of 690 MPa, tensile strength of 790 MPa, and an elongation rate of 18% in 50 mm. This alloy also has excellent impact toughness and wear resistance. In addition to this, it can be hardened by heat treatment to improve its mechanical properties further.

AMS-S-6049 Uses

The AMS-S-6049 can be used in various manufacturing applications such as aerospace, marine, and automotive industries. It is commonly used to produce aircraft and rocket parts, engine components, gears, and other machinery. It is also widely used to manufacture high-performance tools, welding equipment, and other industrial machinery.

AMS-S-6049 Hardness

The hardness of AMS-S-6049 varies depending on the heat treatment applied. Generally, this alloy has a hardness of about 25 HRC to 35 HRC when in the annealed state, and it can go up to 60 HRC when heat-treated. Such hardness makes it perfect for cutting, drilling, and grinding tools.

AMS-S-6049 Heat treatment

Heat treatment is essential to improve the mechanical properties of AMS-S-6049. Heat treatment involves heating the alloy to a certain temperature and quenching it in water or oil to achieve a particular hardness. Different heat treatment methods, such as quenching and tempering, annealing, or normalizing, can be used to obtain various mechanical and physical properties.


AMS-S-6049 is an essential alloy used in various manufacturing applications. Its excellent mechanical and physical properties make it suitable for many industries. Developers, engineers, and manufacturers must understand its composition, physical and mechanical properties, uses, hardness, and heat treatment. We hope this article has provided valuable insight into everything you need to know about AMS-S-6049.

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