Inconel 82 and Inconel 625 are two of the most commonly used superalloys in the aerospace, chemical, and petrochemical industries. Their excellent mechanical properties and high resistance to corrosion, oxidation, and high-temperature environments make them ideal for use in a wide range of applications. In this blog post, we will discuss the differences between Inconel 82 and Inconel 625, giving you a better understanding of which alloy to choose for your particular application.
Difference between Inconel 82 and 625
Composition
Inconel 82 is also known as Inconel 182 and is composed of nickel-iron-chromium alloy with additions of molybdenum and copper. Its high chromium content provides excellent resistance to oxidation, sulfidation, and carburization at high temperatures. Inconel 625, on the other hand, is an alloy made of nickel, chromium, and molybdenum with the addition of niobium. Adding niobium to the alloy creates a stable austenitic structure, which enhances the alloy’s resistance to pitting, crevice corrosion, and stress corrosion cracking.
Mechanical Properties
Inconel 82 has excellent strength at high temperatures and a relatively high modulus of elasticity. It is also resistant to cracking and weldability, making it an ideal choice for welding dissimilar materials. When it comes to Inconel 625, it has a higher tensile strength than Inconel 82, and its modulus of elasticity is also significantly higher. It also exhibits high fatigue strength and excellent toughness at low temperatures.
Corrosion Resistance
Inconel 82 offers excellent resistance to corrosion, oxidation, and high-temperature environments. It can withstand various acidic and alkaline environments, making it well-suited for use in the chemical and petrochemical industries. In contrast, Inconel 625 has even better corrosion resistance than Inconel 82. It is highly resistant to pitting, crevice corrosion, and stress corrosion cracking in chloride-containing environments. As a result, it is commonly used in seawater applications and the aerospace industry.
Cost
Regarding cost, Inconel 625 is more expensive than Inconel 82. The higher cost is mainly due to the addition of niobium, which increases the cost of raw materials. However, the higher cost may be worth it in certain applications requiring a higher level of corrosion resistance, such as in the marine industry or aggressive chemicals. For More information visit marketsmartb2b
Conclusion:
In summary, Inconel 82 and Inconel 625 are both high-performance alloys with excellent mechanical properties and resistance to corrosion, oxidation, and high-temperature environments. Inconel 82 is a better choice for welding dissimilar materials, while Inconel 625 is better suited for use in chloride-containing environments such as seawater. While Inconel 625 is more expensive than Inconel 82, it may be well worth the additional cost in applications requiring a higher corrosion resistance level. When choosing between these two alloys, it is essential to consider the specific requirements of your application to determine which alloy will provide the best performance.
