ThePipingMart Blog Grades AMS 5647 Stainless Steel – Composition, Properties, and Uses

AMS 5647 Stainless Steel – Composition, Properties, and Uses

AMS 5647

AMS5647 is a high-quality stainless steel alloy primarily used for creating precision parts and components for various applications. It’s known for its excellent corrosion and heat damage resistance, making it a popular choice in the aviation, medical, and petrochemical industries. For those who are not familiar with AMS 5647, this blog post will provide you with all the necessary information that you need to know about this alloy.

What is AMS 5647?

AMS 5647 (also known as 304 Stainless Steel) may sound like a complicated code or mathematical formula, but it is an important standard in metallurgy. Simply put, AMS 5647 is a type of stainless steel alloy commonly used in various industries, including aerospace and defence. What makes AMS 5647 so unique is its high resistance to corrosion, which allows it to maintain its strength and durability even in harsh environments. This versatile alloy is prized for its reliability and long-lasting performance, from aircraft components to medical implants. While it may not be a household name, AMS 5647 is critical in many products and technologies we rely on daily.

What Form Is AMS 5647 Available at Piping Mart?

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

AMS 5647 Composition

AMS5647 is a precipitation-hardening stainless steel alloy that contains elements such as Chromium, Nickel, Manganese, and Molybdenum. With its superior chemical composition, it offers high strength and durability, as well as excellent resistance to corrosion, stress, and heat damage. Also, it can be easily machined and forged into various shapes and sizes, making it suitable for a wide range of applications.

Element % Present
Carbon (C) 0.07
Chromium (Cr) 17.50 – 19.50
Manganese (Mn) 2.00
Silicon (Si) 1.00
Phosphorous (P) 0.045
Sulphur (S) 0.015b)
Nickel (Ni) 8.00 – 10.50
Nitrogen (N) 0.10
Iron (Fe) Balance

AMS 5647 Physical Properties

AMS 5647 has excellent physical properties, including high tensile strength, which measures its ability to withstand pulling force; yield strength, which measures how much stress it can handle before the deformation; and elasticity, which measures how quickly a material returns its original shape after being stretched. Additionally, it exhibits high thermal and electrical conductivity, low thermal and electrical resistance, and resists oxidation when exposed to high temperatures.

Property Value
Density 8,000 Kg/m3
Melting Point 1450 °C
Thermal Expansion 17.2 x 10-6 /K
Modulus of Elasticity 193 GPa
Thermal Conductivity 16.2W/m.K
Electrical Resistivity 0.072 x 10-6 Ω .m

AMS 5647 Mechanical Properties

One of the significant benefits of AMS 5647 is its excellent mechanical properties. Its high resistance to fatigue, toughness, and flexibility makes it suitable for precision applications that require extreme strength and durability. Also, it exhibits excellent machining properties, making it easy to cut, form, and shape precisely.

Property Value
Comprehensive Strength 210 MPa
Proof Stress 210 Min MPa
Tensile Strength 520 – 720 MPa
Elongation 45 Min%

AMS 5647 Equivalent













AMS 5647 Uses

AMS 5647 is used in numerous industries, including aerospace, medical, and petrochemicals, where precision and safety are critical. In aerospace, it’s used to build components such as turbine blades and compressor discs, while in the medical industry, it’s used for implantable devices, surgical instruments, and needles. Petrochemical industries use AMS 5647 for building chemical processing equipment such as valves, flanges, and fittings.

AMS 5647 Hardness

AMS 5647 offers high hardness and maintains it even at high temperatures, which makes it an excellent choice for applications where high wear and tear are expected. Its hardness is measured using the Rockwell C scale, which ranges from 20 to 70, with a higher number indicating higher hardness. AMS 5647 can offer a hardness of up to 50 Rockwell C.

AMS 5647 Heat treatment

AMS 5647 can be annealed, a heat treatment process that involves heating the alloy to a specific temperature and cooling it slowly to improve its toughness and flexibility. Also, it can be solution treated, which involves heating it to a high temperature and then rapidly cooling it to harden the material. These heat treatment options make it easy to control the physical and mechanical properties of the alloy, ensuring it performs optimally in various applications.


As you can see, AMS 5647 is an excellent alloy with high strength, durability, and resistance to various elements such as corrosion, heat, and wear. Its exceptional physical and mechanical properties make it a popular choice in industries requiring precision and reliability. Whether you’re building components for aerospace, medical, or petrochemicals, AMS 5647 has got you covered. Understanding its composition, physical and mechanical properties, uses, hardness, and heat treatment options will help you choose the right material for your application.

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