Hastelloy C2000 (UNS N06200, W.Nr. 2.4675) is a copper-bearing nickel-chromium-molybdenum alloy developed by Haynes International, engineered to deliver exceptional corrosion resistance across both oxidizing and reducing acid environments within a single chemistry. Its balanced composition of approximately 23% chromium, 16% molybdenum, and 1.6% copper achieves the broadest corrosion coverage among all wrought C-family alloys, resisting sulfuric acid, hydrochloric acid, hydrofluoric acid, and chloride-induced pitting and crevice corrosion. The alloy serves as a universal solution for mixed-acid chemical processing where process streams alternate between oxidizing and reducing regimes.
Equivalent Grades of Hastelloy C2000
| Similar Alloy | UNS / ASTM | W.Nr. / DIN | EN | JIS | Key Feature |
|---|---|---|---|---|---|
| Hastelloy C2000 | N06200 (B574/B575/B622) | 2.4675 / NiCr23Mo16Cu | NiCr23Mo16Cu | NW06200 | Cu-bearing; broadest acid coverage |
| Hastelloy C-276 | N10276 (B574/B575/B622) | 2.4819 / NiMo16Cr15W | NiMo16Cr15W | NW0276 | No Cu; W-bearing; industry benchmark |
| Hastelloy C-22 | N06022 (B574/B575/B622) | 2.4602 / NiCr21Mo14W | NiCr21Mo14W | NW6022 | Higher Cr; superior oxidizing resistance |
| Alloy 59 | N06059 (B574/B575/B622) | 2.4605 / NiCr23Mo16 | NiCr23Mo16 | NW6059 | No Cu; best thermal stability |
| Inconel 686 | N06686 (B574/B575/B622) | 2.4606 / NiCr21Mo16W | NiCr21Mo16W | NW6686 | Highest PREN; W+Mo combination |
Applications of Hastelloy C2000
Chemical Processing
Sulfuric acid reactors, hydrochloric acid heat exchangers, distillation columns, mixed-acid piping systems, centrifugal pumps, control valves, and pressure vessels handling alternating oxidizing/reducing process streams.
Pharmaceutical & Fine Chemicals
CIP-capable reactors, vacuum dryers, solvent recovery condensers, and high-purity transfer lines exposed to organic acids, halogenated solvents, and aggressive cleaning chemistries.
Pollution Control
FGD absorber vessels, mist eliminators, slurry circulation piping, stack liners, and quench sections in waste incineration and coal-fired power plant scrubbers.
Oil & Gas / Marine
Sour gas wellhead components, subsea umbilical tubing, seawater-cooled heat exchangers, desalination brine heaters, and offshore platform piping exposed to H2S and chloride-laden environments.
Pulp & Paper
Bleach plant washers, chlorine dioxide stages, digesters, and acid-handling equipment exposed to hot chlorinated and acidic pulping liquors.
Energy & Geothermal
Geothermal brine handling equipment, supercritical water oxidation reactors, and waste-to-energy heat recovery boilers facing high-temperature acidic condensate corrosion.
FUSHUN METAL Supply Range for Hastelloy C2000
Chemical Composition of Hastelloy C2000
| Element | Ni | Cr | Mo | Cu | Fe | Co | C | Mn | Si | Al | P | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | Bal. | 22.0 | 15.0 | 1.3 | — | — | — | — | — | — | — | — |
| Max | Bal. | 24.0 | 17.0 | 1.9 | 3.0 | 2.0 | 0.01 | 0.50 | 0.08 | 0.50 | 0.025 | 0.010 |
Composition per ASTM B574 / B575 for UNS N06200, weight percent. FUSHUN METAL operates within tighter internal targets: Cr 22.5-23.5%, Mo 15.5-16.5%, Cu 1.5-1.8%, verified by optical emission spectrometry on every heat.
Mechanical Properties of Hastelloy C2000
Solution-Annealed Condition (1121-1149 deg C / 2050-2100 deg F, Water Quenched)
| Property | Tensile Strength | Yield Strength (0.2%) | Elongation | Hardness | Elastic Modulus | Density | Melting Range |
|---|---|---|---|---|---|---|---|
| Min. Req. | 690 MPa | 283 MPa | 45% | ≤100 HRB | 206 GPa | 8.50 g/cm3 | 1328-1358 deg C |
| Typical | 750-780 MPa | 350-390 MPa | 55-65% | 88-95 HRB | — | — | — |
Values per ASTM B574/B575. FUSHUN METAL performs room-temperature tensile testing per ASTM E8 on every production lot, with hardness verification per ASTM E18. Grain size is maintained at ASTM 5-7 through controlled forging and solution-annealing cycles.
