ThePipingMart Blog Grades AMS 5738 Stainless Steel – Composition, Properties, and Uses

AMS 5738 Stainless Steel – Composition, Properties, and Uses

AMS 5738

AMS5738 is a variant of stainless steel well-known for its exceptional strength, durability, and resistance to corrosion. This steel alloy contains iron as its base metal, with significant amounts of nickel, chromium, and molybdenum added for stability and corrosion resistance. In this blog post, we will delve into the different properties of AMS 5738, its composition, and how it is used in various industries.

What is AMS 5738?

AMS 5738 (also known as 303 Stainless Steel) is a specification that sets the standard for the chemical composition, mechanical properties, and other requirements for a specific type of stainless steel. This material is commonly used in applications where high strength and corrosion resistance are necessary, such as in the aerospace or oil and gas industries. AMS5738 is highly valued for its ability to withstand extreme temperatures and harsh environments, making it a reliable choice for various applications. Whether you’re building an aeroplane, designing an offshore rig, or need a strong and durable metal for your project, AMS5738 is a name you can trust.

What Form is AMS 5738 Available at  Piping Mart?

  • Nut
  • Bar
  • Bolt
  • Pipe
  • Screw
  • Tubing
  • Valves
  • Washers
  • Flanges
  • Fasteners
  • Electrodes
  • Stud Bolts
  • Sheet Plates
  • Pipe Fittings
  • Forged Fitting

AMS 5738 Composition

The composition of AMS 5738 is made up of high levels of nickel (up to 23%), chromium (up to 19%), and molybdenum (up to 4.5%). This mix contributes to its exceptional corrosion resistance and the ability to withstand harsh environments encountered in chemical processes. AMS 5738 also contains much lower carbon levels than other stainless steels (0.03% max), which makes it suitable for welding, heat treatments, and other mild processing techniques.

Element % Present
Carbon (C) 0.10
Chromium (Cr) 17.00 – 19.00
Manganese (Mn) 2.00
Silicon (Si) 1.00
Phosphorous (P) 0.045
Sulphur (S) 0.015 – 0.35
Nickel (Ni) 8.00 – 10.00
Nitrogen (N) 0.10
Copper (Cu) 1.00
Iron (Fe) Balance

AMS 5738 Physical Properties

AMS 5738 has good thermal conductivity and a specific heat capacity of 0.500 J/g-K at 21°C. Its density is 7.94 g/cm³, and its melting point is around 1398°C. This steel alloy is also magnetic, making magnetic measurements easy to carry out. Its maximum degree of magnetic permeability is around 400 One.

Property Value
Density 8.03 Kg/m3
Melting Point 1455 °C
Thermal Expansion 17.2 x 10-6 /K
Modulus of Elasticity 193 GPa
Thermal Conductivity 16.3W/m.K
Electrical Resistivity 0.072 x 10-6 Ω .m

AMS 5738 Mechanical Properties

AMS 5738 is a strong and versatile alloy. Its tensile strength ranges from 760 to 930 MPa, depending on temperature and heat treatment. It also has an excellent yield strength of up to 550 MPa, resulting from its high nickel and molybdenum levels. The steel alloy is ductile and exhibits high toughness, toughness, and impact strength.

Property Value
Comprehensive Strength 190 MPa
Tensile Strength 500 – 700 MPa
Elongation 35 Min%

AMS 5738 Specifications











AMS 5738 Uses

AMS 5738 finds use in various industries, such as chemical processing, marine, aerospace, power, and defence. Its ability to withstand harsh, corrosive environments makes it ideal in these sectors, where exposure to chemicals, salt, and seawater is common. AMS 5738 is also used in manufacturing various components, such as pipelines, heat exchangers, valves, and pumps.

AMS 5738 Hardness

AMS 5738 has a hardness rating of 30 HRC when tempered. It is tough, pliable, and has excellent wear resistance. This hardness rating enables AMS 5738 to withstand the rigours of most industrial applications, making it difficult to machine.

AMS 5738 Heat treatment

Heat treatment is a vital process that helps improve the properties of AMS 5738. AMS 5738 undergoes various heat treatments, such as quench-and-temper, annealing, and stress relieving, to enhance its strength, flexibility, and machinability. Quench-and-temper is the most common heat treatment process, and it involves hardening the steel alloy by heating it above 1000°C and then cooling it down quickly in water or oil.


AMS 5738 material is an excellent stainless steel alloy with high strength, durability, and corrosion resistance. Its high nickel, chromium, and molybdenum content make it suitable for highly corrosive environments, while its low carbon content makes it easy to process through welding and other mild techniques. The steel alloy is also used in various industrial applications, including aerospace, defence, and chemical processing. Overall, AMS 5738 is an excellent steel alloy with a range of exceptional properties, making it an excellent choice for various applications.

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