UNS N06022 (Hastelloy C-22)
Generic Name & Other Designation
Hastelloy C-22®, Alloy C-22, Nickel Alloy C-22, W.Nr. 2.4602, NiCr21Mo14W, NiMo16Cr16W
Product Overview
UNS N06022 (Alloy C-22) is an advanced nickel-chromium-molybdenum-tungsten superalloy engineered to handle the world’s most severe industrial corrosion challenges. Featuring a balanced ratio of chromium, molybdenum, and tungsten, it outshines standard Ni-Cr-Mo alloys when dealing with mixed chemical streams containing wet chlorine, formic acid, acetic anhydride, and brine.
It serves as a primary material of construction in pharmaceuticals, pulp bleaching, and waste incineration where variable chemical states cause frequent corrosion failures.
Key Highlights
✅ Broad Corrosion Spectrum: Outstanding resistance to both oxidizing and reducing chemical attack.
✅ Pitting Index Supremacy: Exceptional resistance to severe pitting, crevice corrosion, and stress corrosion cracking.
✅ Weldability Without Sensitization: Low carbon content prevents intergranular grain-boundary precipitation during joining.
✅ Halide Media Defense: Operates reliably in wet chlorine gas and ferric/cupric chloride solutions.
Chemical Composition & Physical Properties
Chemical Composition (wt%)
Element | Ni | Cr | Mo | W | Fe | Co | C | Si | Mn |
Min (%) | Bal. | 20.0 | 12.5 | 2.5 | 2.0 | — | — | — | — |
Max (%) | (~56.0) | 22.5 | 14.5 | 3.5 | 6.0 | 2.5 | 0.010 | 0.08 | 0.50 |
Physical & Mechanical Properties
Parameter | Value / Standard (Solution Annealed) |
Density | 8.69 g/cm³ |
Melting Range | 1351°C – 1387°C |
Tensile Strength (Rm) | ≥ 690 MPa |
Yield Strength (0.2%, Rp0.2) | ≥ 310 MPa |
Elongation (A5) | ≥ 45% |
Available Forms
Sheets & Plates: Cold-rolled sheet stock, heavy reactor-grade plates.
Seamless & Welded Pipe: Process pipe, condenser tubes, instrument lines.
Bars & Wire: Hexagonal bars, threaded rod stock, TIG filler wire.
Flanges & Fittings: Stub ends, welding reducers, custom blind flanges.
Typical Application Scenarios
Pharmaceutical Manufacturing: Reaction vessels, agitator blades, crystallizer vessels.
Flue Gas Desulfurization (FGD): Scrubber towers, duct linings, reheater tubes.
Pulp & Paper Processing: Chlorination and chlorine dioxide bleaching wash filters.
Quality Assurance & Testing
Intergranular corrosion resistance tests per ASTM G28 standards.
Non-destructive testing (NDT) including eddy current and ultrasonic inspection.
Material Certification EN 10204 3.1 with complete heat chemistry disclosure.
Supplier Information (BELNADE)
As a trusted international distributor, BELNADE stocks and processes UNS N06022 mill products. BELNADE offers value-added services such as waterjet cutting, beveling, and emergency jobsite shipping.
Partner with BELNADE for Corrosion-Resistant Alloy Solutions
📧 Email: info@belnade-material.com
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