In modern manufacturing, choosing a suitable material for a specific application is crucial to achieving the desired outcome. One material that has gained popularity in various industries is AMS 5845. This aerospace-grade steel alloy offers exceptional strength, corrosion resistance, and good machinability. This blog post will look in-depth at AMS 5845, including its composition, physical and mechanical properties, uses, hardness, and heat treatment.
What is AMS 5845?
AMS 5845 (also known as Alloy MP35N) is a high-performance steel alloy commonly used in aerospace applications. It boasts excellent corrosion resistance, superior strength, and wear resistance, making it suitable for critical components such as turbine disks and shafts. With its unique properties, AMS5845 has become an industry-standard material for producing high-stress parts that withstand harsh environments. This alloy is a top choice among engineers and manufacturers who demand the highest performance and reliability.
AMS 5845 Composition
AMS 5845 is a high-strength steel alloy primarily made of iron, nickel, and chromium. Its chemical composition also includes small amounts of carbon, manganese, silicon, sulfur, and phosphorus. The nickel and chromium content contribute to its corrosion resistance and excellent high-temperature properties. Its composition adheres to the strict standards of the Aerospace Material Specification (AMS) Society.
| Element | Content (%) |
|---|---|
| Cobalt, Co | 35.7 |
| Nickel, Ni | 25.5 |
| Chromium, Cr | 19 |
| Iron, Fe | 9 |
| Molybdenum, Mo | 7 |
| Titanium, Ti | 3 |
| Niobium, Nb | 0.6 |
| Aluminum, Al | 0.2 |
AMS 5845 Physical Properties
AMS 5845 has excellent physical properties that make it suitable for various applications. The alloy has a density of 7.8 g/cm3, a melting point of 1399 °C, and a thermal conductivity of 13.3 W/mK. These properties make it ideal for high-temperature applications such as jet engine parts.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 8.33 g/cm³ | 0.301 lb/in³ |
| Melting point | 1427°C | 2600°F |
AMS 5845 Mechanical Properties
AMS 5845 has excellent mechanical properties, making it suitable for high-stress applications such as aircraft engine components. It has a tensile strength of 210 ksi and a yield strength of 115 ksi. Its elongation at break is 25%, and it has good dimensional stability due to its low thermal expansion coefficient.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength (annealed 1052°C) | 848 MPa | 123000 psi |
| Yield strength (at strain 0.200%, annealed 1052°C) | 400 MPa | 58000 psi |
| Elastic modulus (at 232°C/450°F, annealed) | 208 GPa | 30200 ksi |
| Shear modulus (at 232°C/450°F, annealed) | 75.8 GPa | 11000 ksi |
| Elongation at break (cold worked 48%) | 12% | 12% |
| Reduction of area | 46% | 46% |
AMS 5845 Equivalent
- AMS 5841
- AMS 5842
- AMS 5843
AMS 5845 Uses
AMS 5845 is used in various applications, including jet engine components, turbines, and aircraft exhaust systems. It also manufactures industrial gas turbines, medical instrumentation, and power generation systems. Its excellent strength, corrosion resistance, and good machinability make it a popular choice for critical components in demanding environments.
AMS 5845 Hardness
The hardness of AMS 5845 can be varied depending on the heat treatment conditions it undergoes. In the annealed condition, it has a hardness of 225 Brinell when tested with a ball indenter of diameter 10mm. When aged at 593°C for 8 hours, the alloy’s hardness can increase to between 415 and 485 Brinell. This increase in hardness is due to the precipitation of intermetallic phases.
AMS 5845 Heat treatment
AMS 5845 can be heat-treated to improve its mechanical properties. The most common heat treatment process for AMS 5845 is ageing. The alloy is heated to about 593°C for 8 hours. This heat treatment process induces precipitation hardening, which improves its mechanical properties, including its hardness, tensile strength, and yield strength.
Conclusion
AMS 5845 material is an aerospace-grade steel alloy with excellent strength, corrosion resistance, and good machinability. Its composition, physical and mechanical properties, uses, hardness, and heat treatment make it ideal for demanding high-temperature applications such as jet engine components, turbines, and aircraft exhaust systems. Understanding these properties is crucial to selecting the right material for a specific application, and AMS 5845 has proven to be a reliable and popular choice among various industries.
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.
