If you are in the engineering, construction, or chemical production industry, you have probably heard of the metal alloy Incoloy. Specifically, you might have come across a variation known as Incoloy 25-6HN. This alloy is known for its unique properties that suit extreme environments. This blog post will closely examine what Incoloy 25-6HN is, its composition, physical and mechanical properties, uses hardness, and heat treatment.
Incoloy 25-6HN Composition
Incoloy is a nickel-based alloy containing copper, iron, chromium, and molybdenum. The 25-6HN variation has additional elements such as nitrogen and possesses higher nickel and chromium content. The composition of this alloy is what gives it its exceptional properties.
| Element | Content (%) |
|---|---|
| Iron, Fe | 41.3 |
| Nickel, Ni | 24.3 |
| Chromium, Cr | 20.6 |
| Molybdenum, Mo | 6.3 |
| Others | Remainder |
Incoloy 25-6HN Physical Properties
Incoloy 25-6HN is known for its excellent corrosion resistance, especially in acidic environments such as sulfuric and hydrochloric acid. It is also oxidation-resistant and can withstand high temperatures of up to 1000°C. This makes it an ideal material for chemical and petrochemical plants and aircraft engines.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 8.02 gm/cm3 | 0.290 lb/in3 |
Incoloy 25-6HN Mechanical Properties
Besides being resilient to corrosion and high temperatures, Incoloy 25-6HN has excellent mechanical properties. It is challenging, malleable, and has high tensile and yield strength. It also has a low thermal expansion coefficient, meaning it expands minimally when exposed to high temperatures.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength(annealed) | 552 MPa | 80 ksi |
| Yield strength(annealed) | 276 MPa | 40 ksi |
| Elongation at Break | 45% | 45% |
| Hardness, Rockwell B | 90 | 90 |
Incoloy 25-6HN Equivalents
| UNS N08367 | ASTM B 688 | ASTM B 691 | ASTM B 564 | ASTM B 472 |
| ASTM B 676 | ASTM B 675 | ASTM B 804 | ASTM B 366 | ASTM B 462 |
| ASTM A240 |
Incoloy 25-6HN Uses
Thanks to its unique mechanical and physical properties, Incoloy 25-6HN is used in various industries. It is commonly used in the aerospace industry for producing turbine blades, aircraft engines, rocket engines, and heat exchangers. In the chemical and petrochemical industry, it finds use in producing reaction vessels, heat exchangers, and pipes. It also makes chemical processing equipment, such as evaporators and tanks.
Incoloy 25-6HN Hardness
Incoloy 25-6HN has a maximum hardness of 277HB. This hardness can be further controlled by adjustment of the annealing temperature and time, giving it even better mechanical and physical properties when used in specific applications.
Incoloy 25-6HN Heat Treatment
Incoloy 25-6HN can be hardened by heat treatments such as annealing, quenching, and tempering. The heat treatment of Incoloy 25-6HN is critical in determining the alloy’s final mechanical and physical properties. It is important to use the right temperature and duration of heat treatment to attain the desired properties.
Conclusion:
In conclusion, Incoloy 25-6HN is a robust alloy used in various industries. Its unique composition and physical and mechanical properties make it an ideal material for use in extreme environments. The alloy’s excellent corrosion resistance, melting point, and strength make it suitable for petrochemical plants, aerospace, and chemical industries. Understanding the composition, properties, and heat treatment of Incoloy 25-6HN can help engineers and manufacturers create solid and durable materials to be used in highly demanding applications.
Meet Heer, a dynamic and driven writer learning tricks of her trade in the metal industry. With a background in Digital Marketing, Heer brings a unique perspective to her writing, sharing valuable insights. Apart from blogging she like reading and hiking.
