Inconel is an alloy made from nickel and chromium resistant to corrosion, oxidation, and heat. It is used in various industries, such as aerospace, medical, and energy production. Two of the most popular alloys are Inconel 725 and Inconel 718. While both offer superior performance in high-temperature applications, there are some notable differences between the two materials. Let’s take a look at what sets them apart.
Difference Between Inconel 725 and Inconel 718
Their composition is the most significant difference between Inconel 725 and Inconel 718. While both alloys contain nickel and chromium, they have different amounts of each element and other trace elements. For example, Inconel 725 has a higher percentage of molybdenum than its counterpart (6-8% vs. 2-3%). This increased amount of molybdenum helps increase corrosion resistance in extreme temperatures (greater than 800°F).
In addition to having different compositions, these two alloys have other properties regarding strength and hardness. Generally speaking, Inconel 718 has a higher yield strength than its counterpart (62 KSI vs. 48 KSI), while Inconel 725 has a higher ultimate tensile strength (117 KSI vs. 112 ksi). Furthermore, regarding hardness ratings on the Rockwell scale, Inconel 718 is slightly harder than its counterpart (34 HRC vs. 32 HRC).
Finally, one significant difference between these two materials is their cost. Due to the increased amounts of molybdenum in Inconel 725 compared to its counterpart, this material does tend to be more expensive than its counterpart due to increased manufacturing costs associated with producing it.
In conclusion, you should be aware of some critical differences between inconels 725 and 718 before selecting which alloy for your application needs. Generally speaking, if you need an alloy that offers superior corrosion resistance in high temperatures, you should choose inconels 725 over its counterpart due to its higher molybdenum content. However, the cost is a significant factor. In that case, consider using inconels 718 instead since it tends to be less expensive than its counterpart due to the lower manufacturing costs associated with producing it. Ultimately the decision boils down to your specific needs, so make sure you weigh all your options carefully before making any final decisions!
Sakshee is a talented blogger, with a particular focus on the Business and Metal Industry. She is passionate about sharing her insights on various metal products and helping professionals to make a better decisions.