Introduction to Hastelloy Alloys
Hastelloy is a family of high-performance nickel-based alloys renowned for their exceptional corrosion resistance and thermal stability. Developed by Haynes International, these superalloys outperform standard stainless steel in extreme environments containing acids, chlorides, and other corrosive elements.
Key Properties of Hastelloy
Hastelloy alloys offer unique characteristics that make them indispensable in demanding industries:
Unmatched corrosion resistance (resists pitting, crevice corrosion, and stress corrosion cracking)
Excellent oxidation resistance at high temperatures (up to 2200°F/1200°C)
Superior mechanical strength in both oxidizing and reducing environments
Good fabricability despite their high nickel content
Popular Hastelloy Grades and Their Applications
- Hastelloy C276 (UNS N10276)
The most widely used nickel-chromium-molybdenum alloy with:
15-17% chromium
15-17% molybdenum
4-7% iron
Applications: Chemical processing, pollution control, pulp & paper industry, flue gas desulfurization systems
- Hastelloy C22 (UNS N06022)
Improved version with better welding characteristics and:
Higher chromium content (20-22.5%)
12-14% molybdenum
Applications: Pharmaceutical equipment, waste treatment plants, nuclear fuel reprocessing
- Hastelloy B2 (UNS N10665)
Nickel-molybdenum alloy ideal for reducing acid environments:
26-30% molybdenum
Excellent resistance to hydrochloric acid
Applications: Chemical reactors, sulfuric acid production, acetic acid processing
Hastelloy vs Stainless Steel: Key Differences
| Property | Hastelloy | Stainless Steel |
| Corrosion Resistance | Exceptional in acids/chlorides | Good in mild environments |
| Temperature Range | Up to 1200°C | Typically up to 800°C |
| Cost | Higher | More economical |
| Applications | Extreme environments | General-purpose use |
Why Choose Hastelloy for Your Project?
When standard stainless steel grades like 304 or 316 fail in:
- Chemical processing plants
- Marine environments
- Oil & gas equipment
- Pollution control systems
Hastelloy provides the long-term durability and cost-effective performance needed for aggressive media.
Conclusion
As a premier nickel-based superalloy, Hastelloy delivers unparalleled performance where other metals fail. Whether you need Hastelloy C276 sheets, Hastelloy C22 pipes, or Hastelloy B2 fittings, Daxun Alloy provides high-quality alloys tailored to your specific requirements.
Contact us today for expert advice on selecting the right Hastelloy grade for your application.