ThePipingMart Blog Grades AMS 5680 Stainless Steel – Composition, Properties, and Uses

AMS 5680 Stainless Steel – Composition, Properties, and Uses

AMS 5680

The choice of materials used in parts, components, and structures is crucial in metalworking and manufacturing industries. The right material selection can significantly affect its overall performance, durability, and lifespan. One of the most widely used materials in these industries is AMS 5680, known for its superior strength, toughness, and corrosion resistance. If you want to know more about AMS 5680, keep reading as we closely examine its composition, physical and mechanical properties, hardness, heat treatment, and uses.

What is AMS 5680?

AMS 5680 (also known as 347 Stainless steel) is a type of high-strength, corrosion-resistant steel alloy that is often used in aerospace applications. Developed by the Aircraft Materials Subcommittee of the Society of Automotive Engineers, this alloy is prized for its exceptional strength, durability, and resistance to harsh weather conditions and chemical corrosion. Whether you’re designing a new aircraft or looking for a reliable material for your next engineering project, AMS5680 is worth considering – and with its growing popularity in the aerospace industry, we’ll be seeing a lot more of it in the years to come.

What Form is AMS 5680 Available at Piping Mart?

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

AMS 5680 Composition

AMS 5680 is a nickel-based superalloy widely known for its excellent mechanical properties and high resistance to corrosion and oxidation. It comprises 64% Nickel, 19% Chromium, 5% Cobalt, 5% Molybdenum, and 3% Tungsten. It also has small amounts of other elements like Carbon, Silicon, and Iron, which give it its unique properties.

Element AMS 5654
Carbon 0.08
Chromium 17.0-19.0
Nickel 9.0-13.0
Manganese 2.00
Silicon 0.75
Phosphorus 0.045
Sulfur 0.030
Niobium 10 x C min / 1.00 max

AMS 5680 Physical Properties

AMS 5680 has excellent physical properties that make it ideal for high-temperature environments. It has a melting point of 1321°C (2410°F) and a density of 8.4 g/cm³. It also has a low coefficient of thermal expansion, making it resistant to thermal fatigue and shock.

Physical Properties
Density ( ) 7.93
Melting point (°C ) 1400-1425

AMS 5680 Mechanical Properties

AMS 5680 has excellent mechanical properties such as high tensile strength, yield strength, and elongation. Its tensile strength ranges from 1600-2100 Mpa and its yield strength ranges from 1300-1900 Mpa, depending on the heat treatment process. It also has good flexibility and toughness, which makes it ideal for a wide range of applications.

Proof Stress 0.2% (MPa) 205
Tensile strength (MPa) 515
Elongation A5 (%) 40
Hardness HB: 201
HRB: 92

AMS 5680 Hardness

AMS 5680 has excellent hardness, which is important in applications where wear and tear are expected. Its hardness ranges from 25 to 35 HRC depending on the heat treatment process.

AMS 5680 Heat Treatment

AMS 5680 can be heat-treated to improve its mechanical properties. The most common heat treatment processes are solution annealing and precipitation hardening. Solution annealing involves heating the alloy to a temperature of about 1175°C (2150°F) for a given period and then cooling it rapidly to room temperature. Precipitation hardening involves heating the solution-annealed alloy to a temperature of about 760°C (1400°F) for a specified period and then quenching it in water.

AMS 5680 Uses

AMS 5680 is widely used in aerospace, marine, and petrochemical industries where high strength and corrosion resistance are critical. It produces jet engines, gas turbines, aircraft components, and heat exchangers. It is also used in power generation equipment, nuclear reactors, and petrochemical processing plants.


AMS 5680 material  is a highly versatile superalloy with excellent mechanical properties and high resistance to corrosion and oxidation. Its unique composition, physical and mechanical properties make it ideal for high-temperature environments where strength and durability are essential. With its wide range of applications and outstanding performance, it’s easy to see why AMS 5680 is one of the most popular choices for the metalworking and manufacturing industries.

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