ThePipingMart Blog Grades AMS 5546 Stainless Steel – Composition, Properties, and Uses

AMS 5546 Stainless Steel – Composition, Properties, and Uses

AMS 5546

In the world of aerospace and aircraft manufacturing, there is a multitude of materials that are used in various applications. One of the most important materials is AMS 5546, widely used in producing aircraft components. This blog post provides all the information you need about AMS 5546, from its composition to its heat treatment.

What is AMS 5546?

AMS 5546 (also known as AM 350 Stainless Steel) is a material specification that is crucial in the aerospace industry. It outlines the requirements for corrosion-resistant steel bars, forgings, and rings in high-temperature environments. Essentially, AMS 5546 ensures that the materials used in aircraft engines and other critical components can withstand intense heat and corrosive elements. This specification is essential to ensuring the safety and reliability of aerospace equipment. Without it, the consequences could be catastrophic. The rigorous testing and quality control processes enforced by AMS5546 assure engineers and manufacturers that their products will perform as intended, even in the most extreme conditions.

AMS 5546 Composition

AMS 5546 is a nickel-based alloy composed primarily of nickel, chromium, iron, and molybdenum. It also contains small amounts of carbon, manganese, silicon, and sulfur. The composition of AMS 5546 gives it superior oxidation resistance and high strength and toughness.

Element Min Max
Carbon 0.07 0.11
Manganese 0.50 1.25
Silicon 0.50
Phosphorus 0.040
Sulfur 0.030
Chromium 16.00 17.00
Nickel 4.00 5.00
Molybdenum 2.50 3.25
Nitrogen 0.07 0.13

AMS 5546 Physical Properties

AMS 5546 has a density of 8.04 g/cm3 and a melting point of 1371°C. It also has excellent corrosion resistance, making it suitable for harsh environments. In addition, it has good thermal stability, enabling it to withstand high temperatures without becoming brittle.

Properties Metric Imperial
Density 8.08 g/cc 0.292 lb/in³

AMS 5546 Mechanical Properties

AMS 5546 has excellent mechanical properties, including high tensile strength, yield strength, and elongation. Its ultimate tensile strength is 120 ksi, with a yield strength of 70 ksi and an elongation of 25%. This high strength and flexibility make it ideal for use in critical applications where both strength and toughness are required.

Properties Metric Imperial
Tensile strength 1140 MPa 165000 psi
Yield strength (@ strain 0.200%) 827 MPa 120000 psi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (estimated from elastic modulus) 77 GPa 11200 ksi
Elastic modulus 200 GPa 29000 ksi
Poisson’s ratio 0.3 0.3
Elongation at break (in gage length 4.5 times the square root of the area) 18% 18%
Reduction of area 70% 70%

AMS 5546 Uses

AMS 5546 is commonly used in the aerospace industry to manufacture components such as turbine blades, exhaust nozzles, and heat exchangers. It is also used in the chemical processing industry due to its resistance to corrosion and high-temperature stability. Additionally, it can be used in the medical and automotive industries for its high strength and durability.

AMS 5546 Hardness

AMS 5546 has a standard hardness of Rockwell C 42. However, it can be hardened through cold working or heat treatment to increase strength and durability. Hardness levels of up to Rockwell C 52 can be achieved through heat treatment.

AMS 5546 Heat treatment

AMS 5546 can be heat-treated to increase strength and hardness for more demanding applications. The process involves heating the alloy to a high temperature, followed by air cooling or water quenching. This results in a stronger, more durable material that can withstand harsh environments and high stress.


AMS 5546 material is a versatile nickel-based alloy widely used in the aerospace, chemical processing, medical, and automotive industries. Its high strength, toughness, and corrosion resistance make it ideal for critical applications, and its ability to be heat-treated further increases its strength and durability. With this information, you can make an informed decision about using AMS 5546 in your next project.

Related Post