ThePipingMart Blog Grades AMS 5657 Stainless Steel – Composition, Properties, and Uses

AMS 5657 Stainless Steel – Composition, Properties, and Uses

AMS 5657

AMS 5657 is a popular high-strength stainless steel used in various industries for its excellent physical and mechanical properties. This alloy combines corrosion resistance benefits with high strength and abrasion resistance. If you want to know more about AMS 5657, read on as we dive deeper into its composition, properties, and uses.

What is AMS 5657?

AMS 5657 (also known as 15-7 PH Stainless Steel) is a type of austenitic stainless steel widely used in various industries due to its high strength and excellent resistance to corrosion. It is a type of steel that contains a high amount of nickel and is known for its durability and toughness. This particular steel is often used in applications that require high-performance materials, such as aerospace, chemical, and medical industries. AMS 5657 can withstand high temperatures and harsh environmental conditions, making it an essential material for the toughest conditions. Its unique composition makes it ideal for aircraft, gas turbines, boilers, and medical equipment components.

AMS 5657 Composition

The chemical composition of AMS 5657 includes high levels of iron, nickel, and chromium. It also contains molybdenum, which adds additional strength and corrosion resistance. Other elements that are added in small quantities include carbon, manganese, phosphorus, sulfur, silicon, and nitrogen. This combination of elements makes AMS 5657 highly resistant to heat, corrosion, and wear.

Element Content (%)
Iron, Fe 74.9
Chromium, Cr 15
Nickel, Ni 7
Molybdenum, Mo 2
Aluminum, Al 1.1

AMS 5657 Physical Properties

AMS 5657 offers excellent resistance to heat, chemicals, and fatigue. It can withstand temperatures up to 2000°F, making it suitable for high-temperature applications. This alloy also has good resistance to oxidation and corrosion, making it ideal for harsh environments. In addition, it has a high melting point, which means it can be used in high-temperature furnaces and ovens.

Properties Metric Imperial
Density 7.81 g/cm3 0.282 lb/in³

AMS 5657 Mechanical Properties

AMS 5657 has impressive mechanical properties, including high tensile strength, yield strength, and hardness. The alloy can withstand high stress and strain without breaking or deforming. It has a high resistance to abrasion and wear and retains its strength and toughness even at low temperatures. It also has good ductility, making it easy to work with.

Properties Metric Imperial
Tensile strength 900 MPa 131000 psi
Yield strength (@ strain 0.200%) 380 MPa 55100 psi
Elastic modulus 190-210 GPa 27557-30458 ksi
Poisson’s ratio 0.27-0.30 0.27-0.30
Elongation at break 30% 30%
Hardness, Rockwell B (converted from Brinell hardness) 88 88

AMS 5657 Equivalents

  • AMS 5520
  • AMS 5657
  • ASTM A564 (632)
  • ASTM A579 (632)
  • ASTM A693 (632)
  • ASTM A705 (632)
  • DIN 1.4532
  • DIN 1.4574
  • MIL S-8955
  • AMS 5812
  • AMS 5813

AMS 5657 Uses

AMS 5657 finds application in various industries, including aerospace, mining, oil and gas, and chemical processing. It is commonly used in manufacturing aircraft and jet engine components, gas turbines, and steam turbines. It also manufactures pumps, valves, and shafts exposed to corrosive environments. AMS 5657 is also ideal for high-temperature heat exchangers, furnaces, and boilers.

AMS 5657 Hardness

AMS 5657 is a hardened stainless steel, which undergoes a heat treatment process to achieve maximum hardness. Heat treatment involves heating the alloy to a specific temperature and cooling it rapidly to achieve the desired hardness. This process makes AMS 5657 highly resistant to wear and abrasion.

AMS 5657 Heat treatment

AMS 5657 undergoes a heat treatment process, including annealing, solution treatment, and precipitation hardening. Annealing involves heating the alloy to a specific temperature and holding it for a specific time to remove any stresses and restore its elasticity. Solution treating involves heating the alloy to a specific temperature and quenching it to form a solid solution. Precipitation hardening involves heating the alloy to a specific temperature and holding it to allow hardening precipitates to form.


AMS 5657 is a high-strength stainless steel alloy with excellent physical and mechanical properties. Its impressive resistance to heat, corrosion, and wear makes it ideal for various applications across different industries. Its high hardness, strength, and excellent flexibility make it easy to fabricate and process. AMS 5657’s heat treatment process further enhances its strength and hardness, making it a popular choice for critical applications.

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