5 Questions to Ask When Buying INCONEL Alloy 625

When it comes to buying a high-performance nickel alloy with excellent corrosion resistance and unrivalled strength, there are few options better than INCONEL alloy 625. But it’s not a one-size-fits-all solution. While exceptional all round, it’s important to make sure you’re getting the best nickel alloy for your particular application.

With that in mind, here are 5 important questions to ask when buying INCONEL alloy 625, ensuring you’re making the smartest possible decision:

1. What’s the difference between INCONEL alloy 625 and the 600 series?

The INCONEL 600 series is made up of INCONEL alloy 600, INCONEL alloy 601, INCONEL alloy 690, and INCONEL alloy 693, alongside INCONEL alloy 625. There are differences in the chemical compositions of each alloy which make them all suited to different purposes. 625 and 601 are most similar in terms of nickel content, but INCONEL alloy 625 has the addition of molybdenum. INCONEL alloy 600 has the highest nickel content, while 690 and 693 are considered high-chromium alloys.

2. Is INCONEL alloy 625 common in my industry?

While INCONEL alloy 625 is utilised across numerous industries and applications – something quite unusual for nickel alloys– it’s perhaps most commonly seen in two particular sectors: marine and aerospace. It has a well-earned reputation for saltwater applications – propeller blades, submarine fittings, undersea cables, and so on – due to its unique properties. And thanks to its oxidation resistance and fabricability, it’s often ideal for aircraft ducting and engine exhaust systems.

3. Will INCONEL alloy 625 survive in the intended environment?

One of INCONEL alloy 625’s primary benefits is its superior corrosion resistance properties. Therefore, if you’re looking for a high-performance nickel alloy that’s able to withstand multiple forms of corrosion – including salts and alkaline media – the unique mix of nickel, chromium and molybdenum should be more than you need. With excellent resistance against pitting, crevice corrosion and sensitisation during welding, alloy 625 is a good choice for hostile environments.

4. How can I join INCONEL alloy 625?

Easily! The great thing about INCONEL alloy 625 is that it’s very simple to weld and join to other materials. And, best of all, there are no post-weld treatments needed to ensure the alloy retains its strength, durability, and other inherent properties. There’s even a dedicated weld metal product intended for this precise use, called INCONEL Filler Metal 625. Like alloy 625 itself, this filler is resistant against pitting and crevice corrosion, making it the ideal choice for joining INCONEL 625.

5. Is INCONEL alloy 625 really best for me?

This is, perhaps, the most important question of all. And if you’re not sure of the answer, don’t worry – we’re here to help. We know that choosing the right high-performance nickel alloy, for the right application, can be a daunting experience. But we’re always happy to discuss your options with you and help you make the smartest decision. Get in touch with us here at Corrotherm to find out more about INCONEL alloy 625, learn more about other nickel alloys, and find the best solution for you.