What is Hastelloy C276?
Hastelloy C276 is a nickel-molybdenum-chromium superalloy with added tungsten designed for exceptional corrosion resistance in a wide range of severe environments. This alloy is known for its ability to withstand high temperatures and harsh conditions, making it ideal for chemical processing, pollution control, pulp and paper production, and waste treatment. It also exhibits excellent resistance to pitting, stress corrosion cracking, and oxidizing atmospheres up to 1900°F (1038°C).
What is Hastelloy C22?
Hastelloy C22 is another nickel-chromium-molybdenum alloy with enhanced resistance to pitting, crevice corrosion, and stress corrosion cracking. This alloy also includes tungsten and exhibits outstanding resistance to oxidizing and non-oxidizing chemicals. Hastelloy C22 is widely used in various applications, including chemical processing, pollution control, flue gas desulfurization, and marine environments due to its versatility and reliability in corrosive settings.
Difference Between Hastelloy C276 vs C22
| Feature | Hastelloy C276 | Hastelloy C22 |
| Composition | Nickel, molybdenum, chromium, iron | Nickel, chromium, molybdenum, iron |
| Corrosion Resistance | Excellent resistance to pitting, crevice corrosion, and stress-corrosion cracking | Superior resistance to localized corrosion (pitting and crevice) and general corrosion |
| Temperature Range | Effective in high temperatures up to 1900°F (1038°C) | Effective in high temperatures up to 1250°F (677°C) |
| Weldability | Good | Excellent |
| Applications | Chemical processing, pollution control, waste treatment | Pharmaceutical, chemical processing, waste treatment, marine environments |
| Longevity | High | Higher due to better overall corrosion resistance |
| Machinability | Moderate | Moderate to difficult |
| Advantages | Versatile use in harsh environments -Good resistance to oxidizing and reducing conditions | Better overall resistance to a wider range of conditions – Enhanced resistance to oxidizing media |
Both materials are excellent for use in corrosive environments, but Hastelloy C22 has better resistance to a broader range of conditions, making it more versatile for specific applications.
Hastelloy C22 vs C276 Chemical Composition
The chemical composition of these alloys determines their properties and suitability for different environments. Both alloys contain nickel, chromium, and molybdenum, but varying proportions influence their performance in corrosive environments.
| Element | Hastelloy C276 | Hastelloy C22 |
| Nickel (Ni) | 57% | 56% |
| Chromium (Cr) | 15.50% | 22% |
| Molybdenum (Mo) | 16% | 13% |
| Tungsten (W) | 3.50% | 3% |
| Iron (Fe) | 5% | 3% |
Temperature Range
Hastelloy C276 and C22 are designed to perform well in high-temperature environments but have different maximum temperature limits. Hastelloy C276 can withstand higher temperatures than Hastelloy C22, making it more suitable for extreme temperature applications.
| Alloy | Maximum Temperature |
| Hastelloy C276 | 1900°F (1038°C) |
| Hastelloy C22 | 1250°F (677°C) |
Application of Hastelloy C22 vs C276
Hastelloy C276
- Chemical Processing: Ideal for handling corrosive chemicals and aggressive environments.
- Pollution Control: Used in flue gas desulfurization systems and other pollution control equipment.
- Waste Treatment: Suitable for managing hazardous waste and chemical waste treatment systems.
- Marine Environments: Resistant to seawater and brine, making it ideal for marine applications.
- Oil and Gas: Used in sour gas wells, pipelines, and offshore platforms.
Hastelloy C22
- Pharmaceutical Industry: Excellent for equipment exposed to various chemicals and sterilization processes.
- Food Processing: Safe for use in food contact applications, maintaining integrity in corrosive environments.
- Chemical Reactors: Suitable for reactors handling both oxidizing and reducing chemicals.
- Heat Exchangers: Reliable performance in heat exchangers exposed to aggressive media.
- Pulp and Paper Industry: Resistant to bleaching agents and pulp and paper processing chemicals.
Hastelloy C22 vs C276 Price
The price of Hastelloy C276 and C22 varies with market demand, availability, and application requirements. Generally, Hastelloy C22 is slightly more expensive due to its higher chromium content and broader chemical resistance. Hastelloy c276 price in India is approximately ₹3,500 to ₹4,000 per kilogram, while Hastelloy C22 ranges from ₹ 4,000 to ₹4,500 per kilogram. Prices can fluctuate based market condition and specific material grades.
Summary
Hastelloy C276 and C22 are both highly resistant, high-performance nickel-based alloys used in various industrial applications. Hastelloy C276 is noted for its high resistance to reducing and oxidizing conditions and ability to withstand higher temperatures. Hastelloy C22, on the other hand, offers superior resistance to oxidizing conditions and is slightly more expensive due to its composition. Understanding the differences in their chemical compositions, temperature ranges, and specific properties can help you select the right Hastelloy grade for your application.
