Hastelloy C276 is a high performance nickel-based corrosion resistant alloy

1. Chemical Composition

   The main chemical components include nickel (Ni), molybdenum (Mo), chromium (Cr), iron (Fe), tungsten (W), and cobalt (Co). The nickel content is approximately 57%, molybdenum approximately 16%, chromium approximately 16%, and iron approximately 5%. Other elements, such as tungsten, are also present in certain amounts. This optimal balance of elements gives it excellent corrosion resistance.

2. Physical Properties

   Density: Approximately 8.89 g/cm³, which can affect its use in weight-sensitive applications.

   Melting Point: Between 1325°C and 1370°C. This high melting point allows it to withstand relatively high temperatures.

3. Mechanical Properties

   Tensile Strength: Typically around 690 MPa, it exhibits excellent strength and can withstand tensile stresses, meeting the strength requirements of many structural components.

   Yield Strength: Approximately 283 MPa. This indicator reflects the stress at which plastic deformation begins, helping to measure its stability under load.

   Elongation: Generally reaching around 60%. Higher elongation indicates greater plasticity, providing advantages in processing, forming, and handling certain deformation conditions.

4. Corrosion Resistance

   This is a prominent advantage of Hastelloy C276, demonstrating strong resistance to various corrosive media.

   In oxidizing media: For example, in environments containing strong oxidizing acids such as nitric acid, the presence of chromium enables the rapid formation of a stable and dense passivation film on its surface, effectively preventing further corrosion.

   In reducing media: Thanks to its high content of elements such as molybdenum and tungsten, it exhibits excellent corrosion resistance even in strong reducing acids such as hydrochloric acid and sulfuric acid, making it suitable for use in the manufacture of equipment for chemical production involving such corrosive media.

   In media containing chloride ions: Such as seawater or chlorine-containing industrial solutions, it is less susceptible to pitting and crevice corrosion, making it a popular material for equipment in fields such as marine engineering and desalination.

5. Processing Performance

   Hot Working: The heating temperature range is generally between 950°C and 1180°C. Hot working operations such as forging and rolling are relatively easy within this temperature range. However, careful control of processing parameters is required to avoid defects such as overheating and overburning.

   Cold Working: It has certain cold forming capabilities, such as cold bending and cold rolling. However, due to its higher strength, cold working requires greater deformation force than some ordinary metals, and intermediate annealing and other treatments are necessary to eliminate the adverse effects of work hardening.

6. Applications

   Chemical Industry: It is widely used in the manufacture of various chemical reactors, pipelines, valves, etc., for handling highly corrosive chemical raw materials and products, ensuring safe and stable chemical production.

   Oil and Gas Extraction: It is used in downhole tools, Christmas trees, and other equipment, and can withstand the complex corrosive environment downhole, including corrosive media such as sulfur and carbon dioxide.

   Environmental Protection: For example, in flue gas desulfurization and wastewater treatment facilities, its corrosion resistance ensures long-term reliable operation of equipment in harsh chemical environments.

   Marine Engineering: Used in the manufacture of offshore platform structural components and seawater desalination equipment, Hastelloy C276 resists corrosion from seawater and other corrosive factors in the marine environment.

In short, Hastelloy C276, with its excellent comprehensive properties, plays an important role in many critical applications requiring corrosion-resistant materials.