Hastelloy alloys are widely used in various industries due to their exceptional corrosion-resistant properties. Hastelloy C276 Plate is a popular member of the Hastelloy family of alloys, known for its high resistance to corrosion in acidic environments. However, the performance of Hastelloy C276 can be affected by various factors, including temperature. In this blog, we will discuss the effects of temperature on the properties of the Hastelloy C276 plate.
What is Hastelloy C276 Plate?
Hastelloy C276 Plate is a nickel-molybdenum-chromium alloy with an addition of tungsten. It has superior corrosion resistance in oxidizing and reducing environments, making it suitable for chemical processing, flue gas desulfurization systems and pollution control applications. It is highly resistant to pitting and crevice corrosion, stress cracking, intergranular attack and general corrosion in most severely corrosive media. The plate also provides excellent weldability with no pre- or post-weld heat treatments required.
Changes in Corrosion Resistance
The Hastelloy C276 is known for its high resistance to corrosive media, particularly in the presence of chlorides and acids. However, the resistance of the alloy to corrosion can be affected by changes in temperature. In general, the increasing temperature can decrease the corrosion resistance of Hastelloy C276, particularly in certain environments such as hot, concentrated sulfuric acid. At high temperatures, the formation of oxides can create potential corrosion sites, leading to reduced performance of the alloy.
Changes in Mechanical Properties
Another property of Hastelloy C276 that can be affected by temperature changes is its mechanical properties. The alloy generally exhibits excellent mechanical strength and ductility even at high temperatures. However, the alloy can change mechanical properties due to thermal ageing, a process in which the alloy is subjected to high temperatures for extended periods.
Effects on Weldability
Hastelloy C276 is a popular alloy for welding due to its excellent resistance to intergranular corrosion. However, temperature changes can affect the weldability and performance of the alloy. When subjected to high temperatures, the alloy can undergo microstructural changes that negatively impact weldability and corrosion resistance.
Thermal Expansion
Lastly, the effect of temperature on the thermal expansion of Hastelloy C276 should be considered. Like most alloys, Hastelloy C276 expands when subjected to high temperatures. The thermal expansion coefficient of the alloy is affected by temperature changes, which can result in dimensional changes in parts made from the alloy.
Conclusion:
In conclusion, the effect of temperature on the properties of Hastelloy C276 plate must be considered when using the alloy in high-temperature applications. Changes in temperature can significantly affect the alloy’s corrosion resistance, mechanical properties, weldability, and thermal expansion. As such, careful evaluation of the thermal and mechanical properties of the alloy is important to ensure its optimal performance in various environments. When selecting Hastelloy C276 or any other alloy for your application, always consider the temperature and other factors affecting its performance and durability.
