Inconel 625 vs 825- What’s the Difference

Inconel 625 vs 825

Inconel 625 and 825 are nickel-based alloys widely used in various industries. But, many people often need clarification about what makes these two alloys different. In this blog post, we will delve into the differences between Inconel 625 and 825 so that you can choose your specific application.

Difference Between Inconel 625 and 825

Chemical Composition:

The chemical composition of both alloys is different. Inconel 625 is a nickel-chromium-molybdenum alloy with small amounts of niobium and iron. On the other hand, Inconel 825 is a nickel-iron-chromium alloy with small amounts of titanium, copper, and molybdenum. The difference in composition accounts for their different properties.

Strength and Durability:

Inconel 625 has excellent strength and high-temperature resistance, which makes it ideal for harsh environments. It has a tensile strength of 135,000 psi and is highly corrosion-resistant. In contrast, Inconel 825 has a yield strength of up to 30,000 psi and is ideal for applications that require strength and resistance to chemical attack.


Both Inconel 625 and 825 find their applications in various industries. Thanks to its excellent corrosion and heat resistance, Inconel 625 is widely used in the aerospace, chemical, and nuclear industries. On the other hand, Inconel 825 finds its use in the oil and gas industry, chemical processing, and pollution control because of its high strength and resistance to sulphuric acid.


Inconel 625 is an alloy that can be easily welded and brazed, making it easy to fabricate. It has excellent weldability and is resistant to weld cracking. Similarly, Inconel 825 is also an alloy that can be welded, but it requires some precautions to avoid corrosion. Gas tungsten arc welding (GTAW) or gas metal arc welding (GMAW) for welding Inconel 825 is advisable.


Inconel 625 and Inconel 825 have different prices. Inconel 625 is generally more expensive because of its high performance, excellent strength, and corrosion resistance. In contrast, Inconel 825 is more affordable and widely used in various industrial applications.


In conclusion, Inconel 625 and Inconel 825 are different alloys with different chemical compositions, properties, and applications. While both are nickel-based alloys, each has unique features that make them ideal for different applications. Based on what we have discussed, it’s clear that you need to understand your application requirements to make the right choice between Inconel 625 and 825.

Minal Jogale

Minal Jogale

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