ThePipingMart Blog Grades AMS 5726 Stainless Steel Alloy – Composition, Properties, and Uses

AMS 5726 Stainless Steel Alloy – Composition, Properties, and Uses

AMS 5726

If you are in the market for high-quality stainless steel, you have likely come across AMS 5726. It is a popular grade of martensitic, precipitation-hardening stainless steel widely used in aerospace and defence industries. This blog post will provide a comprehensive guide to everything you need to know about AMS 5726, including its composition, physical properties, mechanical properties, uses, hardness, and heat treatment.

What is AMS 5726?

Regarding high-strength alloys, AMS 5726 (also known as Stainless Steel A286) is one of the most reliable options. This particular alloy is a type of stainless steel designed to maintain its durability and resilience even at high temperatures. Thanks to its unique composition, AMS 5726 can resist corrosion and wear, making it an ideal choice for applications where strength and longevity are critical. From aerospace and automotive engineering to manufacturing and construction, AMS 5726 has proven to be a versatile and dependable material that can withstand some of the toughest imaginable conditions. This powerful alloy is worth considering whether you’re building a rocket or a bridge.

AMS 5726 Composition

AMS 5726 sheet is a high-strength, corrosion-resistant stainless steel primarily made of elemental composition, including carbon, chromium, nickel, phosphorus, and sulphur. It has a minimum carbon content of 0.06%, a maximum nickel content of 8.5%, and a maximum chromium content of 13.5%. Phosphorus and sulphur are alloying elements that improve machinability, strength, and corrosion resistance. It also contains a small amount of manganese and silicon for enhancing toughness.

Element Content (%)
Iron, Fe 54
Nickel, Ni 25.5
Chromium, Cr 14.8
Titanium, Ti 2.13
Molybdenum, Mo 1.30
Manganese, Mn 1.0
Silicon, Si 0.50
Vanadium, V 0.30
Aluminum, Al 0.18
Carbon, C 0.040
Phosphorous, P 0.020
Sulfur, S 0.015
Boron, B 0.0060

AMS 5726 Physical Properties

The physical properties of AMS 5726 are essential for understanding its suitability for specific applications. It has a density of 7.81 g/cm^3, a melting point of 1398-1446°C (2550-2635°F), and a thermal conductivity of approximately 14.6 W/make at room temperature. AMS 5726 has excellent corrosion resistance and can withstand high temperatures well, making it an ideal choice for harsh environments.

Properties Metric Imperial
Density 7.92 g/cm3 0.286 lb/in3
Melting point 1399°C 2550°F

AMS 5726 Mechanical Properties

AMS 5726 sheet has excellent toughness and high strength when properly heat-treated. The tensile strength of this stainless steel typically ranges from 1900-2200 MPa, and the yield strength is around 1700 MPa. AMS 5726 is flexible and can be shaped, bent, or formed into various parts and components. It also has excellent fatigue and corrosion resistance, making it ideal for use in demanding engineering applications.

Properties Metric Imperial
Tensile strength 1035 MPa 150100 psi
Yield strength (@strain 0.200%) 759 MPa 110000 psi
Elongation at break 25% 25%
Reduction of area 40% 40%
Hardness, Brinell (estimated from Rockwell C value for Brinell test with 3000 kg load/10 mm diameter ball) 304 304
Hardness, Knoop (estimated from Rockwell C value) 330 330
Hardness, Rockwell C 32 32
Hardness, Vickers (estimated from Rockwell C value) 318 318

AMS 5726 Equivalent

AISI 660 AMS 5525 UNS S66286 AMS 5732 AMS 5734
AMS 5731 AISI 662 AMS 5737 AMS 5804 AMS 5895
AMS 5853 AMS 5805 AMS 5858 DIN 1.4943 SPS M250
DIN 1.4944 GE B50T81 GE B50T12 GE B50T1181 ASTM A453 Grade 660
ASTM A638 Grade 660 stainless steel A-286

AMS 5726 Uses

AMS 5726 plate is extensively used in the aerospace and defence industries, where high strength and resistance to corrosion are essential for aircraft and missile parts. It is also used in the medical and dental fields for creating orthodontic and surgical tools that require high strength and biocompatibility. Other applications of AMS 5726 include:

  • Steam and gas turbines.
  • Chemical processing plants.
  • Different harsh operating environments where solid and durable materials are needed.

AMS 5726 Hardness

AMS 5726 bars can achieve a range of hardness levels, from HRC 33 to HRC 52, depending on the desired application, heat treatment, and processing. This stainless steel has excellent wear-resistance properties. Its hardness can be adjusted to meet specific requirements, making it an excellent choice for cutting and drilling tools and other wear-resistant applications.

AMS 5726 Heat Treatment

Heat treatment is crucial for achieving the desired properties of AMS 5726, including strength, hardness, and flexibility. It is typically annealed, quenched, and then aged at a specific temperature to improve the mechanical properties of the stainless steel. The ageing process can be adjusted to achieve different hardness levels and mechanical properties to meet specific applications.


In conclusion, AMS 5726 material is a high-strength and corrosion-resistant martensitic stainless steel with excellent mechanical properties. It is widely used in demanding aerospace, defence, and medical applications. Its composition, physical properties, mechanical properties, uses, hardness, and heat treatment process are essential factors determining its suitability for specific applications. It is a versatile and durable material that can withstand harsh operating environments, making it an excellent choice for various industries. If you want high-quality stainless steel that can deliver top performance, consider using AMS 5726 for your next engineering project.

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