ThePipingMart Blog Grades AMS 5743 Stainless Steel – Composition, Properties, and Uses

AMS 5743 Stainless Steel – Composition, Properties, and Uses

AMS 5743

Are you looking to use AMS 5743 in your next project but need clarification on its composition, physical or mechanical properties, and uses? Look no further! This comprehensive guide will explore everything that makes AMS 5743 the perfect choice for your next project.

What is AMS 5743?

AMS 5743 (also known as 355 Stainless Steel) is a high-performance, corrosion-resistant, and precipitation-hardened nickel-chromium-iron alloy. It has the ability to withstand high temperatures, making it an excellent choice for use in extreme environments. It is a versatile alloy employed in various applications such as gas turbines, jet engine parts, and natural gas processing equipment.

AMS 5743 Composition

AMS 5743 sheet primarily comprises nickel, chromium, and iron, which are carefully balanced to give them unique properties. Other elements, such as copper, manganese, and silicon, are added in small quantities to improve specific characteristics, such as formability, ductility, and machinability.

Element Content (%)
Iron, Fe 73.53 – 77.33
Chromium, Cr 15 – 16
Nickel, Ni 4 – 5
Molybdenum, Mo 2.5 – 3.5
Carbon, C 0.10-0.15
Manganese, Mn 0.5-1.25
Silicon, Si 0.5
Phosphorous, P 0.04
Sulfur, S 0.03

AMS 5743 Physical Properties

AMS 5743 has a density of 8.19 g/cm³ and a melting point of 1392°C (2538 °F). It has excellent tensile strength, yielding 150 ksi at 0.2% offset and tensile strength of 205 ksi. Its elongation at break is about 20%, making it an excellent choice for forming and drawing.

Properties Metric Imperial
Density 7.7 – 8.03 g/cm3 0.278 – 0.290 lb/in³

AMS 5743 Mechanical Properties

AMS 5743 plates has exceptional mechanical properties, including high corrosion resistance, excellent formability, and ease of welding. The alloy exhibits excellent strength even at high temperatures, making it particularly useful in applications where high heat is a significant factor. The alloy’s excellent fracture toughness makes it suitable for superior reliability and durability applications.

Properties Metric Imperial
Elastic Modulus 190 – 210 GPa 27557 – 30458 ksi
Poisson’s Ratio 0.27 – 0.30 0.27 – 0.30

AMS 5743 Equivalent

  • AISI 634
  • AMS 5547
  • AMS 5549
  • AMS 5744
  • ASTM A564
  • ASTM A579
  • ASTM A693
  • ASTM A705
  • MIL S-8840
  • UNS S35500

AMS 5743 Uses

AMS 5743 sheet is used extensively in a broad range of applications, particularly those that demand superior performance in extreme environments. It finds use in jet engine components, such as turbine blades that require excellent high-temperature strength and fatigue resistance. The alloy is popular in chemical processing, exhibiting excellent corrosion and oxidation resistance. AMS 5743 is also commonly utilized in rocket engine components, such as chambers and nozzles, due to its excellent compatibility with liquid oxygen and effective thrust chamber cooling.

AMS 5743 Hardness and Heat Treatment

AMS 5743 is a precipitation-hardened nickel alloy, which means it has excellent hardness properties. It exhibits a range of 35 to 55 HRC (Rockwell hardness) in its as-received condition. Heat treatment can further harden it, with the ageing process between 1150-1225 °C. The heat treatment process produces a strength range of about ten ksi to 20 ksi, with a corresponding hardness range of about 48 to 54 HRC.


AMS 5743 material is a high-performance and versatile nickel alloy with exceptional properties, including high tensile and yield strength, excellent corrosion and fatigue resistance, and ease of formability and welding. Its unique composition and properties make it popular in various demanding industries, such as aerospace, power generation, and chemical processing. Understanding its compositions, physical and mechanical properties, and uses are vital in making an informed decision when choosing a material that suits your specific application.

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