Steel is crucial in several industries, including aerospace, marine, and automotive. Engineers and manufacturers must choose the right steel type to maximize its performance, strength, and durability in specific applications. One steel alloy that has gained popularity is AMS5902. This blog will closely examine what AMS 5902 is, its composition, physical and mechanical properties, uses, and heat treatment.
What is AMS 5902?
AMS 5902 (also known as 301 Stainless Steel) is a type of stainless steel that is highly sought after in the aerospace industry due to its exceptional durability and resistance to corrosion. This material is a type of precipitation-hardening stainless steel, meaning that it can undergo a hardening process through the precipitation of alloy elements from a supersaturated solid solution. This makes AMS5902 ideal for use in harsh environments, such as those in the aerospace industry. In addition to its excellent material properties, AMS5902 is also highly malleable and easy to machine, making it a popular choice for complex aerospace components. Whether you’re an engineer in the aerospace industry or simply curious about advanced materials, AMS5902 is undoubtedly a material worth learning about.
What Form is AMS 5902 Available at Piping Mart?
- Nuts
- Bolts
- Pipes
- Washers
- Fasteners
- Screws
- Tubing
- Sheet Plates
- Stud Bolts
- ERW Pipes
AMS 5902 Composition
AMS5902 is part of the precipitation-hardening stainless steel family, commonly known as PH stainless steel. This alloy contains chromium, nickel, and copper and is strengthened by adding titanium and molybdenum. The unique composition of AMS 5902 provides exceptional corrosion resistance, high strength, and excellent formability.
|
Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
N |
|
|
AMS 5902 |
min. max. |
– 0.15 |
– 2.0 |
– 1.0 |
– 0.045 |
– 0.030 |
16.0 18.0 |
– |
6.0 8.0 |
– 0.10 |
AMS 5902 Physical Properties
AMS 5902 has a density of 0.282 lb/in^3 and exhibits good thermal conductivity, making it an ideal material for heat exchange processes. The steel also has a low coefficient of thermal expansion, which means it undergoes minimal dimensional changes when subjected to high temperatures. AMS 5902 has a melting point of around 2460°F, significantly higher than conventional steels.
|
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 |
Electrical Resistivity (nΩ.m) |
|||
|
0-100°C |
0-315°C |
0-538°C |
at 100°C |
at 500°C |
|||||
|
AMS 5902 |
7880 |
193 |
16.9 |
17.2 |
18.2 |
16.2 |
21.4 |
500 |
695 |
AMS 5902 Mechanical Properties
AMS 5902 has excellent mechanical properties, including high tensile and yield strength, impact resistance, and toughness. The material also demonstrates outstanding fatigue strength and stress corrosion cracking resistance. With these capabilities, AMS 5902 is a popular choice for critical aerospace and aircraft applications, such as engine components and structural sections.
|
AMS 5902 |
Tensile Strength (MPa) min. |
Yield Strength 0.2% Proof (MPa) min. |
Elongation (% in 50mm) (thick.>0.76mm) min. |
Bend Test (thickness > 1.27mm) |
|
|
Bend Angle (°) |
Factor |
||||
|
Annealed |
758 |
276 |
60 |
– |
– |
|
1/16 Hard |
620 |
310 |
40 |
180 |
1 |
|
1/8 Hard |
690 |
380 |
40 |
180 |
1 |
|
1/4 Hard |
862 |
514 |
25 |
90 |
2 |
|
1/2 Hard |
1034 |
758 |
18 |
90 |
2 |
|
3/4 Hard |
1205 |
930 |
12 |
90 |
3 |
|
Full Hard |
1276 |
965 |
9 |
90 |
5 |
AMS 5902 Uses
Due to its high strength, corrosion resistance, and formability, AMS 5902 is widely used in aerospace, power generation, and chemical processing industries. In aerospace, steel is used to manufacture jet engine components, such as turbine blades, compressor discs, and heat exchangers. AMS 5902 is used in gas turbines, steam turbines, and heat exchangers for its high thermal conductivity in power generation. At the same time, in chemical processing, it is employed in pumps, valves, and reactors where its excellent corrosion resistance is beneficial.
AMS 5902 Hardness
AMS 5902 has a unique combination of strength, toughness, and formability, giving it a maximum hardness of HRC 40. In specific aerospace applications, AMS 5902 is further strengthened by heat treatment, increasing its hardness and strength.
AMS 5902 Heat treatment
The heat treatment process enhances the mechanical properties of AMS 5902, especially the hardness and strength. The standard heat treatment is a solution annealing process followed by a precipitation-hardening treatment. The solution annealing process is done at 1900°F for 30 minutes, followed by rapid cooling to below 90°F. This step prepares the steel for subsequent ageing treatment. The ageing process is done at a low temperature of 900°F for approximately 4 hours, followed by air cooling. The ageing process causes titanium and molybdenum carbide precipitation, further strengthening the material.
Conclusion:
AMS 5902 material is an exceptional precipitation-hardening stainless steel with outstanding corrosion resistance, strength, toughness, and formability. Its chemical composition and unique mechanical properties make it an excellent choice for critical applications in aerospace, power generation, and chemical processing. With a maximum hardness of HRC 40, AMS 5902 is an ideal material for structural components in high-stress environments. The heat treatment process further enhances the mechanical properties, making AMS 5902 a reliable and durable material.
A passionate metal industry expert and blogger. With over 5 years of experience in the field, Palak brings a wealth of knowledge and insight to her writing. Whether discussing the latest trends in the metal industry or sharing tips, she is dedicated to helping others succeed in the metal industry.
