The difference between 2.0872 (CuNi 90/10) and 2.0882 (CuNi 70/30) pipes lies primarily in their chemical composition, corrosion resistance, and mechanical characteristics; these differences determine their use in various industrial contexts. Both alloys are part of the copper-nickel group, which is known for its high resistance to marine corrosion and biological agents.
Alloy 2.0872 (CuNi 90/10) contains approximately 90% copper and 10% nickel, as well as smaller amounts of manganese and iron, which increase its resistance to erosion. This material has good thermal and electrical conductivity and is highly resistant to saltwater corrosion. This makes it ideal for heat exchangers, saltwater systems, marine piping, and condensers.
On the other hand, alloy 2.0882 (CuNi 70/30) consists of 70% copper and 30% nickel, giving it higher mechanical strength and stronger corrosion protection in harsher environments, such as turbulent waters or high carbon dioxide levels. It also resists high temperatures and impingement corrosion better, making it a popular choice in power plants, marine cooling systems, and desalination plants. In conclusion, CuNi 90/10 (2.0872) is a very good choice if you want a tube with good corrosion resistance and a lower cost. On the other hand, CuNi 70/30 (2.0882) offers improved performance under higher pressures or temperatures.
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