Hastelloy C-22丨UNS N06022
Hastelloy C-22 (UNS N06022) is a versatile nickel-chromium-molybdenum-tungsten alloy with outstanding resistance to pitting, crevice corrosion, and aggressive oxidizing or reducing environments. Widely used in chemical processing, marine engineering, pollution control, and pharmaceutical industries. Available in pipe, plate, sheet, bar, wire, and forging forms.
✔ ASTM / ASME Standards ✔ Fast Delivery
✔ Global Export ✔ Custom Sizes
✔ Mill Test Certificate ✔ OEM Processing
Hastelloy C-22 Supplier & Manufacturer
Hastelloy C-22 (UNS N06022 / W.Nr. 2.4602) is a versatile nickel-chromium-molybdenum-tungsten alloy with exceptional resistance to oxidizing and reducing corrosive environments. The alloy is widely recognized for its outstanding resistance to pitting, crevice corrosion and stress corrosion cracking in aggressive chemical processing applications.
Due to its superior corrosion resistance and excellent fabrication properties, Hastelloy C-22 is extensively used in chemical processing, marine engineering, pharmaceutical equipment, pollution control systems and offshore industries.
JA Alloy supplies high-quality Hastelloy C-22 products in various forms including pipe, tube, plate, sheet, bar, wire, flange and forgings according to ASTM, ASME and international standards.
Key Features of Hastelloy C-22
- Excellent resistance to oxidizing and reducing acids
- Outstanding pitting and crevice corrosion resistance
- Superior resistance to wet chlorine and chloride environments
- Excellent weldability and fabrication performance
- Strong resistance to stress corrosion cracking
- High reliability in severe chemical processing conditions
- Excellent performance in mixed acid environments
- Suitable for highly corrosive industrial applications
Chemical Composition of Hastelloy C-22
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | 20.0 – 22.5 |
| Molybdenum (Mo) | 12.5 – 14.5 |
| Tungsten (W) | 2.5 – 3.5 |
| Iron (Fe) | 2.0 – 6.0 |
| Cobalt (Co) | 2.5 max |
| Carbon (C) | 0.015 max |
| Manganese (Mn) | 0.50 max |
| Silicon (Si) | 0.08 max |
Mechanical Properties of Hastelloy C-22
| Property | Value |
|---|---|
| Tensile Strength | 690 MPa min |
| Yield Strength | 310 MPa min |
| Elongation | 45% min |
| Hardness | ≤ 100 HRB |
| Density | 8.69 g/cm³ |
| Melting Range | 1325 – 1370°C |
Corrosion Resistance
Hastelloy C-22 offers exceptional resistance to a wide range of aggressive chemical environments including oxidizing acids, reducing acids, wet chlorine and mixed acid systems.
The alloy performs exceptionally well in:
- Hydrochloric acid environments
- Sulfuric acid systems
- Wet chlorine applications
- Chloride-containing environments
- Flue gas desulfurization systems
- Chemical reactors and scrubbers
Its versatility makes Hastelloy C-22 one of the most reliable corrosion-resistant nickel alloys for chemical processing industries.
Applications of Hastelloy C-22
Chemical Processing
Used in reactors, heat exchangers, piping systems and pressure vessels handling aggressive chemicals and acids.
Pollution Control
Widely used in flue gas desulfurization systems, scrubbers and waste treatment equipment.
Pharmaceutical Industry
Suitable for highly corrosive pharmaceutical processing environments requiring superior corrosion resistance.
Marine & Offshore
Applied in offshore systems exposed to chloride-rich seawater environments.
Hastelloy C-22 vs Hastelloy C276
| Property | Hastelloy C-22 | Hastelloy C276 |
|---|---|---|
| UNS Number | N06022 | N10276 |
| Main Composition | Ni-Cr-Mo-W | Ni-Mo-Cr-W |
| Oxidizing Environment Resistance | Excellent | Very Good |
| Reducing Acid Resistance | Excellent | Excellent |
| Pitting & Crevice Corrosion Resistance | Excellent | Very Good |
| Weldability | Excellent | Good |
| Typical Applications | Chemical Processing, Pollution Control | Chemical Industry, Marine Engineering |
| Best For | Mixed oxidizing and reducing acids | Severe corrosive environments |
Standards & Equivalent Grades
ASTM Standards
- ASTM B574
- ASTM B575
- ASTM B622
Equivalent Grades
- UNS N06022
- W.Nr. 2.4602
- Alloy C22
Frequently Asked Questions
What is Hastelloy C-22 used for?
Hastelloy C-22 is widely used in chemical processing, pollution control, pharmaceutical equipment and offshore applications requiring exceptional corrosion resistance.
Is Hastelloy C-22 resistant to hydrochloric acid?
Yes. Hastelloy C-22 provides excellent resistance to hydrochloric acid and mixed acid environments.
What is the difference between Hastelloy C-22 and C276?
Hastelloy C-22 generally offers better resistance to oxidizing environments, while Hastelloy C276 is widely used for severe reducing acid applications.
Is Hastelloy C-22 suitable for seawater applications?
Yes. Hastelloy C-22 performs very well in chloride-rich marine and offshore environments.
Why Choose J&A Alloy as Your Hastelloy C-22 Supplier?
- Professional nickel alloy supplier and exporter
- Strict quality inspection and PMI testing
- ASTM / ASME compliant materials
- Global export experience
- Competitive pricing and fast delivery
- Custom processing services available
- Technical support for material selection
For pricing, technical support or custom specifications, please contact J&A Alloy for a quotation.
