Inconel 625 vs 750- What’s the Difference

Inconel 625 vs 750

When it comes to high-temperature applications, choosing the right material that suits your requirements is important. Two of the most popular materials used in high-temperature applications are Inconel 625 and Inconel 750. While both materials are excellent for high-temperature applications, they have some notable differences that set them apart. This blog post will closely examine Inconel 625 and Inconel 750 and highlight their differences.

Difference Between Inconel 625 and 750


Inconel 625 and 750 both belong to the Inconel family of alloys, which are known for their high-temperature resistance, corrosion resistance, and excellent mechanical properties. Inconel 625 is a nickel-chromium-molybdenum alloy, while Inconel 750 is a nickel-chromium alloy. Inconel 750 has a higher nickel content (70%) than Inconel 625 (58%) and contains small amounts of aluminium and titanium.

Temperature Resistance:

Both Inconel 625 and 750 have excellent high-temperature resistance. However, Inconel 750 has a slightly higher temperature resistance than Inconel 625, with a maximum operating temperature of 980°C compared to Inconel 625, which has a maximum operating temperature of 870°C. Inconel 750 may be a better choice if your application requires higher operating temperatures.

Corrosion Resistance:

Inconel 625 and 750 have excellent corrosion resistance, making them ideal for harsh environments. However, Inconel 625 has better corrosion resistance than Inconel 750, especially in acidic environments. If your application involves exposure to acids or other corrosive substances, Inconel 625 may be the better choice.

Mechanical Properties:

In terms of mechanical properties, both Inconel 625 and 750 have similar properties. However, Inconel 750 has higher strength than Inconel 625, making it ideal for applications that require high strength at high temperatures. Inconel 625 has lower strength but better ductility, which makes it ideal for applications that require good formability.


Inconel 750 is more expensive than Inconel 625 due to its higher nickel content and the addition of other elements like aluminium and titanium. If cost is a concern, Inconel 625 may be a better choice.


Choosing the right material for high-temperature applications is crucial, and Inconel 625 and 750 are excellent choices. Inconel 750 is a better choice for applications that require higher operating temperatures and high strength, while Inconel 625 is better for applications that require better corrosion resistance and good formability. However, cost is an important factor to consider, and if cost is a concern, Inconel 625 may be a better choice. Ultimately, the choice between Inconel 625 and 750 will depend on your specific application requirements, and it’s important to consult an expert before deciding.

Minal Jogale

Minal Jogale

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