ThePipingMart Blog Grades AMS 5639 Stainless Steel – Composition, Properties, and Uses

AMS 5639 Stainless Steel – Composition, Properties, and Uses

AMS 5639

AMS 5639 is a popular type of stainless steel widely used due to its excellent strength, high corrosion resistance, and superior properties. This alloy is known for its exceptional physical and mechanical properties, making it a top choice in various industries. Before investing in AMS 5639, learning this material’s composition, properties, and uses is essential. This blog post will cover everything you need to know about AMS 5639, including its physical and mechanical properties, composition, uses, hardness, and heat treatment.

What is AMS 5639?

AMS 5639 (also known as 304 Stainless Steel) is known for its corrosion resistance and high strength, making it a popular choice in the aerospace and defense industries. AMS 5639 is also commonly used in the medical field due to its biocompatibility. So, whether flying in a plane or undergoing a medical procedure, AMS5639 is crucial in ensuring your safety and well-being.

What Form is AMS 5639 Available at Piping Mart?

  • Nut
  • Bars
  • Bolt
  • Pipe
  • Screw
  • Tubing
  • Valves
  • Washers
  • Channels
  • ERW Pipes
  • EWR Tubing
  • Flanges
  • Fasteners
  • Electrodes
  • Stud Bolts
  • Sheet Plates
  • Pipe Fittings
  • Forged Fitting
  • Instrumentation Fittings

AMS 5639 Composition

AMS 5639 bars is an iron-chromium-nickel-molybdenum-manganese alloy containing a minimum of 15% chromium, 2% molybdenum, and 1.5% nickel. These materials make it highly resistant to corrosion and heat while giving it excellent strength and flexibility. Other elements that may be present include carbon, phosphorus, sulfur, silicon, and nitrogen.






0.0 – 0.07

0.0 – 0.03

0.04 – 0.08


0.0 – 2.0

0.0 – 2.00

0.0 – 2.0


0.0 – 1.00

0.0 – 1.00

0.0 – 1.0


0.0 – 0.05

0.0 – 0.05

0.0 – 0.04


0.0 – 0.03

0.0 – 0.02

0.0 – 0.02


17.50 – 19.50

17.50 – 19.50

17.00 – 19.00


8.00 – 10.50

8.00 – 10.50

8.00 – 11.00





N 0.0-0.11 0.0-0.11 0.0 – 0.10

AMS 5639 Physical Properties

AMS 5639 has excellent physical properties, which make it ideal for various applications. It has a density of 7.8 g/cm3, a melting point of 1398-1446°C, and a thermal conductivity of 21.5 W/m°C. It is also non-magnetic, making it suitable for magnetic-sensitive applications. Moreover, it has excellent corrosion resistance, which is ideal for harsh environments.




8.00 g/cm3

Melting Point

1450 °C

Modulus of Elasticity

193 GPa

Electrical Resistivity

0.72 x 10-6 Ω.m

Thermal Conductivity

16.2 W/m.K

Thermal Expansion

17.2 x 10-6/K

AMS 5639 Mechanical Properties

AMS 5639 has superior mechanical properties, which make it a top choice in various applications. It has a tensile strength of 620 MPa, yield strength of 310 MPa, and an elongation of 25%. It also has excellent fatigue strength and can withstand temperatures up to 1200°F without losing strength. Furthermore, it has good weldability and can be easily formed into different shapes using various fabrication techniques.

AMS 5639 Equivalents



























AMS 5639 Uses

AMS 5639 is a versatile material used in various applications, including chemical processing, aerospace, marine and offshore, petrochemical, and medical industries. It is commonly used in producing valves, pumps, gears, shafts, and turbines and in heat exchangers, pressure vessels, and reactors. It is also used in surgical and dental equipment due to its non-magnetic and biocompatible properties.

AMS 5639 Hardness

AMS 5639 has excellent hardness properties, which make it ideal for various applications. Its Brinell hardness is in the range of 180-220, while its Rockwell hardness is in the range of B80-90. It can be hardened using various heat treatment techniques, such as annealing, quenching, and tempering, to achieve the desired hardness properties.

AMS 5639 Heat Treatment

AMS 5639 can be heat-treated to enhance its mechanical and physical properties. Annealing increases its flexibility and reduces its hardness while quenching and tempering are used to increase its strength and hardness. Heat treatment involves heating the material to a specific temperature, holding it for a certain time, and cooling it to room temperature. The particular heat treatment process depends on the desired properties and application of the material.

AMS 5639 Density

Density is a crucial parameter for materials used in different industries. It refers to the amount of mass contained in a given volume of a substance. AMS 5639 is a common specification used in the aerospace industry for stainless steel bars and wires. The density of materials with this specification varies based on composition and processing, making it a critical factor in the design and performance of parts and components. Understanding density is vital for manufacturers to achieve desired material properties and specific tolerances. Ensuring the material has the correct density can also reduce the risk of part failure due to incorrect weight or volume. With this in mind, it’s clear that density is a fundamental concept in materials science and engineering, one that cannot be overlooked.


In conclusion, AMS 5639 is ideal for various applications due to its excellent properties, including mechanical strength, corrosion resistance, and hardness. This alloy is widely used in different industries, from aerospace to medical, and is known for its reliable performance and durability. You can determine whether it is the right material for your application by understanding its composition, properties, and uses. If you’re looking for a high-performance stainless steel material, AMS 5639 is worth considering.

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