HASTELLOY C-2000What material does it correspond to?

HASTELLOY® C-2000® alloy (UNS N06200) is unique among the versatile nickel-chromium-molybdenum materials in having a deliberate copper addition. This provides greatly enhanced resistance to sulfuric acid. It also has a high chromium content, to maximize its resistance to oxidizing chemicals and process streams contaminated with ferric ions and dissolved oxygen.

Like other nickel alloys, it is ductile, easy to form and weld, and possesses exceptional resistance to stress corrosion cracking in chloride-bearing solutions (a form of degradation to which the austenitic stainless steels are prone). It is able to withstand a wide range of oxidizing and non-oxidizing chemicals, and exhibits outstanding resistance to pitting and crevice attack in the presence of chlorides and other halides.

Typical chemical process industry (CPI) applications include reactors and heat exchangers.

To compare the performance of HASTELLOY® C-2000® alloy with that of other materials, it is useful to plot the 0.1 mm/y lines. In the following graphs, the lines for C-2000® alloy are compared with those of C-22® alloy, C-276 alloy, 625 alloy, 254SMO alloy, and 316L stainless steel, in hydrochloric and sulfuric acids. Note the superiority of C-2000 alloy in hydrochloric acid at concentrations up to 10%, and in sulfuric acid at concentrations up to 80%. The hydrochloric acid concentration limit of 20% is the azeotrope, above which corrosion tests are less reliable.