C-2000® Alloy
UNS N06200
Trade Name: Hastelloy®

HASTELLOY® C-2000® alloy, developed to optimize a material for broad applicability, began with the conceptual idea of adding copper to the well established nickel-chromium-molybdenum (Ni-Cr-Mo) family of alloys. Since its introduction in late 1995, it has gained, and continues to gain, dramatic market acceptance owing to its inherent versatility. This technical innovation not only offers increased resistance to aqueous corrosion but has succeeded in expanding the overall applicability for Ni-Cr-Mo family of alloys.

This new material was designed to resist an extensive range of corrosive chemicals, including sulfuric, hydrochloric, and hydrofluoric acids. Unlike previous Ni-Cr-Mo alloys, which were optimized for use in either oxidizing or reducing acids, C-2000 alloy extends corrosion resistance in both types of environments. The combination of molybdenum and copper (at levels of 16 and 1.6 wt. %, respectively) provide the outstanding resistance to reducing media, while oxidizing acid resistance is provided by a high chromium content (23 wt. %).

From an engineering viewpoint, C-2000 alloy offers significant potential toward production improvement in plant operations. When used in place of the established Ni-Cr-Mo alloys, the enhanced resistance to corrosion in certain media results in longer equipment life (for a given thickness of material), while providing a greater degree of safety during an upset condition. This increase in corrosion performance versatility supports the industry trend toward multiple uses of equipment (reactors, heat exchangers, valves, pumps, etc.) to gain a greater return on the capitalized expense. For example, a reactor could be handling a hydrochloric acid-based product mixture, then used in another operation which may rely on the use of a nitric acid-based process. Because of its versatility, C-2000 alloy is the best equipped nickel-based alloy to handle this degree of variance in process streams. (Information provided by Haynes International, Inc.)

ASME Boiler and Pressure Vessel Specifications
Sheet/ Plate Forgings Weld Fittings Rod and Bar Tubing - Welded/ Smls Pipe - Welded/ Smls Bolting- Bolts/ Nuts Filler Metals
SB575 SB574/ SB564 SB366 SB574 SB626/ SB622 SB619/   SB622 SB574-"C"/ SB574-"C" ERNiCrMo-17 (Pending)

ASME Boiler and Pressure Vessel Chemical Requirements for Sheet/Plate
Note: all percentages max unless otherwise specified
Mo Cr Fe Co C Si Mn P S Ni Al Cu
15.0-17.0 22.0-24.0 3.0 2.0 0.010 0.08 0.5 0.25 0.010 Rem 0.5 1.3-1.9

ASME Boiler and Pressure Vessel Mechanical Properties for Sheet/Plate
Tensile Strength, Min ksi Yield Strength, (0.2% offset), Min, ksi Min. Elongation in 2", % Density lb/in³
85 35 30.0 0.297


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