Hastelloy C-22 (UNS N06022) Nickel Alloy Pipe
Hastelloy C-22 pipe is a nickel-chromium-molybdenum alloy engineered to deliver exceptional resistance to localized corrosion, including pitting and crevice attack. Compared to C-276, C-22 offers enhanced resistance in oxidizing environments and improved protection against chloride-induced corrosion. It is widely used in highly aggressive chemical processing systems and pollution control applications.
Key Features
- ✔ Outstanding resistance to pitting and crevice corrosion
- ✔ Excellent performance in oxidizing and reducing media
- ✔ Superior resistance to stress corrosion cracking
- ✔ High resistance to wet chlorine and mixed acids
- ✔ Good weldability without post-weld heat treatment
Technical Specifications
| Item |
Details |
| Grade |
Hastelloy C-22 |
| UNS |
N06022 |
| Werkstoff No. |
2.4602 |
| Standards |
ASTM B622 / ASTM B619 / ASTM B626 / ASME SB622 |
| Pipe Type |
Seamless / Welded |
| Outer Diameter |
6mm – 610mm |
| Wall Thickness |
0.8mm – 40mm |
| Length |
Random / Fixed / Customized |
| Surface Finish |
Annealed / Pickled / Polished |
Typical Chemical Composition (%)
| Ni (Bal.) |
Cr |
Mo |
Fe |
C (Max) |
| Balance |
20.0 – 22.5 |
12.5 – 14.5 |
2.0 – 6.0 |
0.015 |
Main Applications
Chemical Processing Plants
Used in reactors, heat exchangers, and transfer piping exposed to mixed acids and chlorinated systems.
Flue Gas Desulfurization (FGD)
Applied in scrubbers and ducting systems handling acidic flue gases.
Waste Treatment & Pollution Control
Ideal for equipment exposed to aggressive industrial waste streams.
Pharmaceutical & Specialty Chemical Production
Provides high purity corrosion resistance for sensitive chemical processes.
Why Choose Voyage Metal?
- ✔ Strict alloy composition control and PMI testing
- ✔ Full mechanical property inspection
- ✔ EN 10204 3.1 / 3.2 certification available
- ✔ Third-party inspection (SGS, BV, TUV) upon request
- ✔ Secure export packaging and global logistics support
Frequently Asked Questions
1. What is the difference between Hastelloy C-22 and C-276?
C-22 provides improved resistance to pitting and crevice corrosion in oxidizing environments compared to C-276.
2. Is C-22 suitable for wet chlorine applications?
Yes, C-22 demonstrates excellent resistance to wet chlorine and mixed acid systems.
3. Does C-22 require post-weld heat treatment?
No, it maintains strong corrosion resistance in the as-welded condition.
4. Do you provide customized sizes?
Yes, we manufacture according to project drawings and specifications.
Request a Quote Today
Looking for a reliable Hastelloy C-22 pipe supplier? Our technical team is ready to support your project.
🌐 Website: www.voyagemetal.com
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