ThePipingMart Blog Grades AMS 5645 Stainless Steel – Properties, Uses, Composition

AMS 5645 Stainless Steel – Properties, Uses, Composition

AMS 5645

AMS 5645 is premium-grade stainless steel widely used across various industries. It is characterized by its exceptional strength, durability, and resistance to corrosion, making it a top choice for applications that require high performance and reliability. As an expert in materials science, I can attest to the superior quality of AMS 5645material. Its unique composition ensures it can withstand harsh environments and extreme temperatures without compromising its structural integrity.

What is AMS 5645?

AMS 5645 (also known as 321 Stainless Steel) is a high-performance stainless steel commonly used in the aerospace industry. The material is known for its outstanding strength, corrosion, and wear resistance, making it an ideal choice for critical applications that demand reliability and durability. This stainless steel is designed to withstand extreme conditions, such as high temperatures and pressure, which are common in aerospace applications. The flexibility of AMS5645 also allows for various forms of fabrication, including welding and machining. For engineers and designers in the aerospace industry, AMS5645 is an essential material that provides both high performance and dependability in demanding environments.

What Form is AMS 5645 Available at Piping Mart?

  • Nut
  • Bolt
  • Pipe Fittings
  • Tubing
  • Valves
  • Flanges
  • Channels
  • Fasteners
  • Electrodes
  • Sheet Plates
  • Forged Fitting
  • Instrumentation Fittings

AMS 5645 Composition

As an expert in materials science, the composition of AMS 5645 is a topic of great interest. This material is a type of stainless steel known for its high strength and excellent corrosion resistance. Its composition includes a significant amount of nickel, chromium, and molybdenum, all of which contribute to its impressive performance properties. Additionally, titanium in the alloy makes AMS 5645 particularly resistant to oxidation at high temperatures. Overall, the composition of AMS 5645 is carefully balanced to provide optimal strength, durability, and resistance to damage from environmental factors.

Element AMS 5645
Carbon 0.08
Chromium 17.0-19.0
Nickel 9.0-12.0
Manganese 2.00
Silicon 0.75
Nitrogen 0.10
Phosphorus 0.045
Sulfur 0.030
Titanium 5(C+N) min / 0.70 max

AMS 5645 Physical Properties

AMS 5645 sheet is a type of stainless steel that is commonly used in a range of industrial applications. It is known for its excellent corrosion resistance properties, strength, and durability. The physical properties of AMS 5645 welding wire make it an ideal choice for applications where high strength and corrosion resistance are required. The material has a high tensile strength, which makes it withstand high stresses, even at elevated temperatures. Additionally, it has a high resistance to corrosion, including corrosion from chemicals and acids. Overall, the physical properties of AMS 5645 make it a versatile material for a wide range of applications, from aerospace engineering to medical devices.

Grade Density (kg/m3) Elastic Modulus (GPa) Mean Coefficient of Thermal Expansion (μm/m/°C) Thermal Conductivity (W/m.K) Specific Heat 0-100 °C (J/kg.K) Electrical Resistivity (nΩ.m)
0-100 °C 0-315 °C 0-538 °C at 100 °C at 500 °C
AMS 5645 8027 193 16.6 17.2 18.6 16.1 22.2 500 720

AMS 5645 Mechanical Properties

AMS 5645 tubes is a popular choice for mechanical components due to its exceptional resistance to corrosion and heat, making it ideal for use in various applications. Its mechanical properties are equally impressive, with high levels of strength and hardness combined with good ductility and machinability. A popular variant, AMS 5645 Type 1, boasts particularly high toughness and impact resistance, making it a go-to choice for components requiring strength and durability in harsh operating environments. As an expert in mechanical components, I can confirm that AMS 5645 is a reliable and high-performing material that stands up to even the most demanding applications.

Proof Stress 0.2% (MPa) 205
Tensile strength (MPa) 515
Elongation A5 (%) 40
Hardness HB: 217
HRB: 95

AMS 5645 Equivalents

Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
AMS 5645 S32100 321S31 58B, 58C 1.4541 X6CrNiTi18-10 2337 SUS 321

AMS 5645 Uses

AMS 5645 bars is an austenitic, high-strength steel known for its excellent corrosion resistance and durability, making it a popular choice for use in aerospace, medical, and chemical applications. As an expert in the field, I can attest to AMS 5645’s unique strength and resistance to harsh environments, making it a reliable material for critical components such as bolts, shafts, and fasteners. With its exceptional machinability and versatility, this steel has become an industry standard and a go-to choice for professionals looking for high-performance materials that can deliver consistent results. Whether you’re working with aircraft parts or medical equipment, AMS 5645 offers a range of uses that can help you achieve your specific goals.

AMS 5645 Hardness

When it comes to assessing the hardness of a material, there are a number of factors that must be taken into consideration. AMS 5645 is likely a commonly encountered material for those familiar with the aerospace industry. Known for its exceptional toughness and corrosion resistance, this stainless steel alloy is frequently used in various critical applications. But what about its hardness? According to industry experts, the hardness of AMS 5645 can vary depending on several factors, including heat treatment, surface finish, and composition. These factors must be carefully considered and controlled to achieve the desired hardness level for a specific application. As with any material, a deep understanding of its properties is crucial for achieving optimal results.

AMS 5645 Heat treatment

Heat treatment is essential for ensuring the strength and durability of AMS 5645. As an expert in this field, I highly recommend that the heat treatment for this type of material be conducted with the utmost care and precision. Failure to do so can result in the material becoming brittle or prone to failure, which can be dangerous in high-pressure or high-heat environments. The process of heat treatment involves heating the material to a specific temperature and then rapidly cooling it to lock in the desired structure and properties. This is a complex process, and it requires the expertise of a skilled technician to perform it correctly. Therefore, working with a reputable, experienced heat-treating facility is crucial to ensure that your AMS 5645 bar can perform to its full potential.


As an expert in materials science and engineering, I am thrilled to provide my insights on the conclusion of AMS 5645. This specification outlines the requirements for a premium-quality stainless steel alloy with exceptional strength, durability, and corrosion resistance. The conclusion of AMS 5645 marks a milestone in the continued evolution of modern materials technology. Thanks to the tireless efforts of dedicated engineers and scientists, this alloy has been rigorously tested and refined to meet the highest quality and performance standards.

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