ThePipingMart Blog Grades AMS 5737 Stainless Steel Alloy – Composition, Properties and Uses

AMS 5737 Stainless Steel Alloy – Composition, Properties and Uses

AMS 5737

Steel is one of the most important materials in modern industries. It is the backbone of many machines and structures and is used in everything from automotive parts to aerospace components. However, not all steels are created equal. AMS 5737 is a popular steel alloy with many desirable properties, and it has found wide use in many applications. This blog post will explore everything you need to know about AMS 5737.

What is AMS 5737?

AMS 5737 also known as Stainless Steel A286. It is a precipitation-hardening stainless steel with good corrosion resistance and a high yield strength. It is mostly iron, with around 15-17% chromium, 3-5% nickel, 3-5% copper, and 0.15-0.45% niobium or tantalum.

AMS 5737 Composition

As mentioned, AMS 5737 comprises iron, chromium, nickel, copper, and niobium or tantalum. The composition may vary slightly depending on the specific form of the alloy, but it typically contains around 15-17% chromium, 3-5% nickel, and 3-5% copper. The addition of niobium or tantalum helps to enhance the alloy’s properties and increase its strength.

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 5737 Physical properties

The physical properties of AMS 5737 depend on the specific form of the alloy, but generally, it has a density of around 7.8 g/cm3 and a melting point of around 1399-1454°C. It also has a low magnetic permeability, making it useful in applications where magnetic interference could be problematic.

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

AMS 5737 Mechanical properties

One of the main advantages of AMS 5737 is its high yield strength. In the annealed state, it typically has a yield strength of around 550 MPa. This can be increased to 1100-1400 MPa through precipitation hardening. It also has good ductility, which means it can be formed into various shapes without fracturing and has good impact resistance.

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 5737 Equivalent

AISI 660 AMS 5525 AMS 5726 AMS 5732 AMS 5734
AMS 5731 AISI 662 UNS S66286 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 5737 Uses

AMS 5737 material is used in many applications that require high strength, corrosion resistance, and good ductility. Aerospace commonly uses it for components like landing gear, structural members, and engine parts. It is also used in the automotive industry for things like valve stems and gear shafts, as well as in the medical industry for surgical instruments and implants.

AMS 5737 Hardness

The hardness of AMS 5737 depends on the specific form of the alloy and its heat treatment. It typically has a hardness of around 200-300 HB in the annealed state. However, precipitation hardening can increase the hardness to 35-45 HRC.

AMS 5737 Heat Treatment

AMS 5737 can be heat treated to increase its strength and hardness. The specific heat treatment process will depend on the desired properties and the specific form of the alloy. However, precipitation hardening is commonly used to increase the strength and hardness of AMS 5737.


AMS 5737 material is a versatile steel alloy widely used in many industries. Its high strength, good ductility, and corrosion resistance make it ideal for many aerospace, automotive, and medical applications. Its mechanical properties, such as high yield strength and impact resistance, make it a popular choice for many critical components. Whether you’re an engineer designing components for a spacecraft or a manufacturer of surgical instruments, AMS 5737 is an alloy you should consider.

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