AMS 5666 Inconel Alloy – Composition, Properties and Uses
In today’s rapidly advancing world, technology is increasingly dominant in every aspect of our lives. As such, there is a growing demand for solid and durable materials that can withstand high-stress applications. AMS5666 is an alloy that fits this description perfectly. AMS 5666 is commonly used in high-temperature applications, such as gas turbine components, due to its exceptional strength and resistance to corrosion. This article will explore this superalloy’s composition, physical and mechanical properties, and various applications.
What is AMS 5666?
AMS 5666 (also known as Inconel 625) metal is a high-performance alloy used in various industries. It is made from a combination of nickel, chromium, molybdenum, and iron, which gives it exceptional strength and versatility. This metal can withstand high temperatures and corrosive environments, making it a popular choice for applications in aerospace, chemical processing, and oil & gas. AMS5666 is known for its excellent oxidation resistance and ability to maintain its structural integrity in extreme conditions. With its remarkable properties, it’s no wonder why this metal is in such high demand.
What Form is Available at AMS 5666 Piping Mart?
- Nut
- Bar
- Bolt
- Pipe
- Screw
- Tubing
- Valves
- Washers
- Flanges
- Fasteners
- Electrodes
- Stud Bolts
- Sheet Plates
- Pipe Fittings
- Forged Fitting
AMS 5666 Composition
AMS 5666 is a nickel-based superalloy that contains chromium, molybdenum, and iron as its primary constituents. It also includes small amounts of carbon, titanium, and aluminium to enhance its mechanical properties. The nickel-chromium combination gives it excellent resistance to corrosion and oxidation at high temperatures, while molybdenum and iron contribute to its high strength and durability. The precise composition of AMS 5666 differs depending on the manufacturer and application.
| ELEMENT | INCONEL 625 |
|---|---|
| NI | 58.0 min |
| AL | 0.40 max |
| FE | 5.0 max |
| MN | 0.50 max |
| C | 0.10 max |
| SI | 0.50 max |
| S | 0.015 max |
| P | 0.015 max |
| CR | 20.0 – 23.0 |
| NB + TA | 3.15 – 4.15 |
| CO (IF DETERMINED) | 1.0 max |
| MO | 8.0 – 10.0 |
| TI | 0.40 max |
AMS 5666 Physical Properties
AMS 5666 has a density of 8.2 g/cm³ and a melting point of 1390°C. It also has high thermal conductivity and a low coefficient of thermal expansion. Its excellent thermal stability makes it a top choice in high-temperature applications.
| DENSITY | 8.44 g/cm 3 / 0.305 lb/in 3 |
| MELTING POINT | 1290 -1350 (°C) / 2350 – 2460 (°F) |
| SPECIFIC HEAT @ 70°F | 0.098 Btu/lb/°F |
| PERMEABILITY AT 200 OERSTED (15.9 KA) | 1.0006 |
| CURIE TEMPERATURE | -190 (°C) / < -320 (°F) |
| YOUNG’S MODULUS (N/MM2) | 205 x 10 |
| ANNEALED | 871 (°C) / 1600 (°F) |
| QUENCH | Rapid Air |
AMS 5666 Mechanical Properties
The outstanding mechanical properties of AMS 5666 make it ideal for high-stress applications. It has a tensile strength of up to 1000 MPa and can handle temperatures up to 982°C. It also maintains its mechanical strength even at high temperatures, making it an ideal material for use in high-stress environments. AMS 5666 can also withstand high-frequency vibrations, making it suitable for components in gas turbine engines.
| PROPERTY | 21°C | 204 °C | 316 °C | 427 °C | 538 °C | 649 °C | 760 °C | 871 °C |
| Ultimate Tensile Strength /Mpa | 992.9 | 923.9 | 910.1 | 910.1 | 896.3 | 820.5 | 537.8 | 275.8 |
| 0.2% Yield Strength /MPa | 579.2 | 455.1 | 434.4 | 420.6 | 420.6 | 413.7 | 406.8 | 268.9 |
| Elongation % | 44 | 45 | 42.5 | 45 | 48 | 34 | 59 | 117 |
| Coefficient of Thermal Expansion µm/m⁰C | – | 13.1 | 13.3 | 13.7 | 14 | 14.8 | 15.3 | 15.8 |
| Thermal Conductivity /kcal/(hr.m.°C) | 8.5 | 10.7 | 12.2 | 13.5 | 15 | 16.4 | 17.9 | 19.6 |
| Modulus of Elasticity/ MPa | 2.07 | 1.93 | 1.93 | 1.86 | 1.79 | 1.65 | 1.59 | – |
AMS 5666 Equivalent
| STANDARD | WERKSTOFF NR. (WNR) | UNS | JIS | GOST | BS | AFNOR | EN |
| Inconel 625 | 2.4856 | N06625 | NCF 625 | ХН75МБТЮ | NA 21 | NC22DNB4MNiCr22Mo9Nb | NiCr23Fe |
AMS 5666 Uses
The exceptional properties of AMS 5666 make it the preferred material for use in high-temperature applications. It is often used in gas turbine components, such as combustion rings and transition ducts, where it is exposed to high temperatures, corrosive environments, and mechanical stresses. AMS 5666 is also used in the aerospace industry for heat exchangers and afterburner components due to its exceptional strength and resistance to fatigue.
AMS 5666 Hardness and Heat Treatment
AMS 5666 can be subjected to various heat treatments to achieve the desired properties. It is typically heat-treated at around 1093°C to 1150°C to enhance its strength and mechanical properties. After heat treatment, AMS 5666 has a hardness level of 25 and 34 HRC, making it suitable for high-stress applications.
Conclusion
AMS 5666 material is a special nickel-based superalloy with properties ideal for high-temperature and high-stress applications. Its excellent thermal stability, mechanical properties, and resistance to corrosion and oxidation at high temperatures make it a top choice for gas turbine components and other high-stress applications. So, the applications are endless when it comes to this superalloy.
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.
