Nimonic 80a vs Inconel – What’s the Difference

Nimonic 80a vs Inconel

Nimonic 80a and Inconel are popular nickel-based alloys widely used in various industrial applications. While they may seem similar initially, the two have significant differences. This blog post explores the properties, applications, and differences between Nimonic 80a and Inconel.

What is Nimonic 80a?

Nimonic 80A is a nickel-chromium-cobalt alloy commonly used in applications requiring high strength, heat, and corrosion resistance. It has excellent strength up to 1400°C and good oxidation resistance in air up to 815°C. It also has superior creep resistance at temperatures equal to or above 550°C (1020°F). Nimonic 80A is very popular for use in aircraft components such as turbine blades, combustor liners, afterburner rings and exhaust ducts due to its impressive strength characteristics that enable parts with thinner sections. Additionally, this material offers excellent fatigue life, making it an ideal choice for various applications.

What is Inconel?

Inconel is an incredibly resilient and corrosion-resistant metal, particularly useful in high-temperature environments. It is a nickel-chromium alloy with great strength and oxidation resistance thanks to its unique composition containing more than 20 other elements such as silicon, titanium, molybdenum, and cobalt. Its temperature characteristics allow it to stand up against temperatures from cryogenic levels up to 2200°F while maintaining its mechanical properties. Furthermore, Inconel has been used for countless applications such as nuclear reactors, power generation turbines, aerospace components, oil & gas production equipment, chemical plants, fasteners & springs, medical implants & surgical tools etc.

Difference Between Nimonic 80a and Inconel

Nimonic 80A and Inconel are nickel-based superalloys known for their high corrosion resistance. Nimonic 80A has a higher tensile strength than Inconel but is less resilient to temperature changes and is most commonly used in aircraft engine components. Conversely, Inconel is better suited for applications such as nuclear reactors that require high heat tolerance.

Composition

Nimonic 80A and Inconel are nickel-based alloy materials but have different compositions. Nimonic 80A is composed of Nickel (80%), Chromium (15%) and Iron (5%), while Inconel is composed of Nickel (72%), Chromium (14%-17%) and other elements such as Molybdenum, Titanium, Aluminium, Copper, and Manganese.

Properties

Nimonic 80A has a high tensile strength, making it ideal for applications requiring high strength at elevated temperatures. It also has excellent oxidation and creep resistance at temperatures up to 1000°C. On the other hand, Inconel has superior corrosion resistance compared to Nimonic 80A due to its higher chromium content. It also has good weldability and formability, making it suitable for various applications.

Applications

Due to its high strength at elevated temperatures, Nimonic 80A is often used in aerospace applications such as turbine blades and discs, exhaust systems, engine valves, and combustion chambers. Conversely, Inconel is mainly used in chemical processing equipment due to its excellent corrosion resistance and ability to withstand extreme temperatures up to 1100°C. It is also used in marine engineering components due to its superior corrosion resistance in seawater environments.

Cost

In general, Nimonic 80A is more expensive than Inconel due to the higher cost of nickel which accounts for most of the material cost for both alloys. However, there can be significant price differences between suppliers depending on availability and minimum order quantities, so it’s important to shop around for the best price.

Availability

Nimonic 80A and Inconel are widely available from metal suppliers worldwide in various forms, including sheet, plate, bar, tube/pipe, wire rod etc. The availability of each alloy will depend on your location, so it’s always best to check with local suppliers before ordering online or from overseas suppliers who may need more stock locally available.

Conclusion

In conclusion, Nimonic 80a and Inconel are nickel-based alloys with unique properties and applications. In general, Nimonic 80a is better at withstanding high temperatures and corrosion resistance, while Inconel is more ductile and has higher strength at room temperature. When choosing between the two materials, it’s important to consider your specific needs and choose the one that best suits your application.