ThePipingMart Blog Metals Machinability of Inconel 625 vs 718 – What’s the Difference

Machinability of Inconel 625 vs 718 – What’s the Difference

Machinability of Inconel 625 Vs 718

Inconel is a type of superalloy, meaning it is an alloy that stands up to extreme temperatures and corrosive environments. Two of the most popular grades of Inconel are 625 and 718. While both are strong and durable alloys, they differ in terms of their machinability. Let’s take a look at how these two alloys compare when it comes to machining.



Difference Between Inconel 625 vs 718 Machinability

When comparing the machinability of Inconel 625 and 718, there are several factors to consider. Both alloys offer excellent corrosion resistance and strength at high temperatures, but they differ in terms of cost, hardness, and ease of use.

Inconel 625 is more expensive than 718 because it has higher nickel content 718. However, this also means that it is easier to machine than 718 due to its lower hardness. Additionally, Inconel 625 has better weldability than 718 due to its low carbon content, which makes it easier to join materials together without cracking or warping them.

In comparison, Inconel 718 is less expensive than 625 but has a higher hardness rating which makes it more difficult to machine than 625. It also has higher carbon content which can lead to cracking or warping during welding processes if not handled properly. However, the high hardness rating does make it ideal for applications where strength is needed, such as aerospace components or other parts that require wear resistance.




In conclusion, although both Inconels have excellent durability and corrosion resistance at extreme temperatures, their machinability differs greatly depending on the application needs of your project. For those looking for a cost-effective option with good weldability and easy machining capabilities, then Inconel 625 is the better choice; however, for projects requiring strength, then Inconel 718 might be the better choice due to its high hardness rating despite being slightly more difficult to machine due its higher carbon content. Ultimately the decision will depend on your unique application needs, but hopefully, this overview gave some insight into the differences between these two alloys when it comes to machining capabilities!

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