Hastelloy C2000 / UNS N06200 / 2.4675 is a corrosion-resistant nickel-chromium-molybdenum-tungsten alloy designed for use in highly corrosive environments. Hastelloy C2000 exhibits exceptional resistance to a wide range of corrosive chemicals, including sulfuric acid, hydrochloric acid, phosphoric acid, acetic acid, and chlorine-containing environments. Its high chromium and molybdenum content contribute to its corrosion resistance, while tungsten enhances its resistance to pitting and crevice corrosion. This alloy is commonly used in chemical processing, pharmaceutical, and pollution control applications where corrosion resistance is critical.
Hastelloy C2000 Chemical Composition:
- Nickel (Ni): Approximately 57%
- Chromium (Cr): Approximately 23%
- Molybdenum (Mo): Approximately 16%
- Cobalt (Co): Approximately 1.6%
- Iron (Fe): Approximately 1.3%
- Tungsten (W): Approximately 1.2%
- Carbon (C): Maximum of 0.01%
- Manganese (Mn): Maximum of 0.5%
- Silicon (Si): Maximum of 0.08%
- Phosphorus (P): Maximum of 0.04%
- Sulfur (S): Maximum of 0.02%
1. Nickel (Ni):
Being the primary element in Hastelloy alloy C2000, nickel contributes to its exceptional corrosion resistance, particularly in reducing environments.
Nickel also enhances the alloy's toughness and ductility, allowing it to withstand high-stress conditions without fracturing.
2. Chromium (Cr):
Chromium provides resistance to oxidation and corrosion, forming a protective oxide layer on the surface of the alloy.
In 2.4675 Hastelloy C2000, the chromium content is relatively high, further improving its resistance to a wide range of corrosive media, including oxidizing acids and chloride-containing environments.
3. Molybdenum (Mo):
Molybdenum enhances the alloy's resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in chloride-rich environments.
Hastelloy C2000's significant molybdenum content contributes to its excellent performance in highly corrosive conditions, such as those found in chemical processing and oil refining industries.
4. Cobalt (Co):
Cobalt is added to Hastelloy C2000 UNS N06200 to improve its high-temperature strength and resistance to thermal stress.
This element also enhances the alloy's resistance to wear and erosion, making it suitable for applications involving abrasive media and high-velocity flows.
5. Tungsten (W):
Tungsten imparts additional strength and stability to Alloy C2000, particularly at elevated temperatures.
It also enhances the alloy's resistance to localized corrosion, such as pitting and crevice corrosion, in aggressive chemical environments.
6. Carbon (C), Manganese (Mn), Silicon (Si), Phosphorus (P), Sulfur (S):
These elements are present in trace amounts and are carefully controlled to ensure the desired mechanical properties and corrosion resistance of Hastelloy C2000.
Carbon is kept to a minimum to prevent carbide precipitation and sensitization, which can compromise the alloy's corrosion resistance in certain environments.
Manganese, silicon, phosphorus, and sulfur are typically controlled to very low levels to minimize impurities and maintain the alloy's purity and integrity.
Alloy C2000 UNS N06200 Product Forms
These percentages may vary slightly depending on the specific manufacturer and product form (e.g., pipe, tube, plate, sheet, bar, fittings, flanges, etc.). Additionally, trace amounts of other elements may be present as impurities or deliberate additions to enhance certain properties.
