When it comes to high-performance alloys, one of the most commonly used materials is Hastelloy. This nickel-based alloy is known for its superior corrosion resistance, durability, and versatility. However, there are different types of Hastelloy and two of the most popular variants are C22 and C2000. Both offer a range of benefits and are often used in similar applications. In this blog post, we will delve into the differences between Hastelloy C22 and C2000 so that you can choose the right alloy for your specific needs.
What is Hastelloy C22?
Hastelloy C22 is a nickel-chromium-molybdenum alloy with excellent resistance to pitting, crevice corrosion and stress corrosion cracking. This alloy’s versatility makes it suitable for various chemical process environments, including chlorides or oxidizing media. It also has higher strength than many other alloys of similar composition.
What is Hastelloy C2000?
Hastelloy C2000 is an excellent nickel-chromium-molybdenum alloy with superior corrosion resistance and tensile strength. It is a highly versatile superalloy that oxidizes and reduces media, even at elevated temperatures. The addition of cobalt increases the strength of this alloy, making it an excellent choice for various applications in industries such as chemical processing and industrial equipment manufacturing.
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Differences Between Hastelloy C22 and C2000
Composition
Hastelloy C22 and C2000 differ in their chemical composition, which is a defining factor in their unique properties. C22 contains around 22% chromium, 13% molybdenum, and 3% tungsten, while C2000 contains approximately 23% chromium, 17% molybdenum, and 3% copper. C2000 also has a higher nickel content than C22. Copper is added to C2000 to improve its resistance to sulfuric acid.
Corrosion Resistance
Another key difference between Hastelloy C22 and C2000 is their corrosion resistance. C22 is highly resistant to corrosive chemicals, including oxidizing and reducing environments. It is particularly resistant to pitting and crevice corrosion. C2000, on the other hand, provides excellent resistance to sulfuric acid and other aggressive chemical environments with high levels of chloride ions. It is also highly resistant to stress corrosion cracking.
Applications
C22 and C2000 are used in various industrial applications where resistance to corrosion and high temperatures are required. However, due to their unique properties, they are often used in different industries. Hastelloy C22 is commonly used in chemical processing, pickling tanks, and waste treatment due to its corrosion resistance. Meanwhile, C2000 is popular in the pharmaceuticals and petrochemical industries, where its excellent resistance to sulfuric acid and chloride environments is required.
Fabrication
Hastelloy C22 and C2000 have different levels of ease when it comes to fabrication. C22 is considered to be more easily fabricated than C2000. This means it is easier to weld, cut, and form C22 than C2000. However, both alloys are still considered difficult to machine, so working with an experienced fabricator is essential when considering these materials.
Cost
Lastly, the cost is essential when deciding between Hastelloy C22 and C2000. C2000 is typically more expensive than C22 due to its higher copper content. However, the price difference may be worth it if the application requires specific chemical resistance or other unique properties found in C2000.
Conclusion
In conclusion, while there are similarities between Hastelloy C22 and C2000, they differ in composition, corrosion resistance, applications, fabrication, and cost. When choosing between them, evaluating the specific properties required for the application is essential. At the same time, it is critical to work with experienced fabricators to ensure that the chosen material is machined correctly and meets the required specifications. By understanding the differences between these two alloys, you will be better equipped to make the right choice for your specific needs.
