ThePipingMart Blog Metals Inconel 601 vs 602 – What’s the Difference

Inconel 601 vs 602 – What’s the Difference

Inconel 601 vs 602

In the engineering world, Inconel is a well-known metal widely used in industries like the chemical, aerospace, and defence sectors. For over half a century, Inconel has been the preferred choice for high-temperature applications due to its unique characteristics. Two of the popular Inconel grades are 601 and 602. While these alloys have their similarities, they also have their differences. In this blog, we will explore the unique traits of Inconel 601 vs 602 and help you identify which is the better choice for your application.

Difference Between Inconel 601 and 602


One of the most important considerations while choosing an Inconel alloy is its corrosion resistance. Inconel 601 is known for its excellent corrosion resistance properties in several environments, including acidic conditions. Including aluminium in its composition makes it a perfect fit for environments rich in sulfur. On the other hand, Inconel 602 is less resistant to corrosion as compared to 601.

Heat Treatment

An essential property of any high-temperature alloy is its ability to withstand thermal cycling. Inconel 601 has excellent heat-treatment abilities and can endure high temperatures up to 1150°C. It can also be easily welded by conventional means, making it a popular choice for fabricating components in high-temperature environments. Inconel 602, on the other hand, has limited heat-treatment abilities and is not recommended for high-temperature applications.

Mechanical Properties

Mechanical properties such as tensile strength, yield strength, and elongation are essential when choosing any metal. Inconel 601 stands out as it has excellent mechanical properties, including high tensile strength of 870MPa at room temperature and high elongation of 45%. Inconel 602, on the other hand, has comparatively lower mechanical properties than 601, making it less suitable for high-stress applications.


Cost is Another crucial factor when choosing an alloy. Inconel 601 is cheaper than Inconel 602 as it contains less nickel and has a simpler manufacturing process. It also has better availability, making it a popular choice for most applications.


Though Inconel 601 has a broader range of applications, Inconel 602 is still preferred in some industries. For example, due to its high nickel content, Inconel 602 finds use in specific applications where resistance against corrosion, erosion, and high-temperature strength is paramount. But, due to its limited heat-treatment abilities, it is not recommended for high-temperature environments.


After studying the unique properties of Inconel 601 vs 602, we can conclude that both alloys have their pros and cons. Inconel 601 is an excellent choice for high-temperature applications that require excellent heat treatment and corrosion resistance, while Inconel 602 is ideal for specific applications requiring high nickel content. Whether you choose Inconel 601 or Inconel 602, consider all parameters and requirements of your application before making a decision. We hope this blog has helped you gain insights into the ultimate comparison between Inconel 601 vs 602.

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