Hastelloy C-22 (UNS N06022)
Introduction
Hastelloy C-22 (UNS N06022), also known as Alloy C22, is a nickel chromium molybdenum tungsten alloy designed for strong resistance in highly corrosive environments.
It provides reliable protection against pitting, crevice corrosion, and stress corrosion cracking, especially in chloride and acid media.
Compared with many stainless steels and nickel alloys, Alloy C22 delivers more stable performance in severe chemical service conditions.
The alloy performs well in both oxidizing and reducing environments, making it suitable for chemical processing equipment, pharmaceutical systems, semiconductor manufacturing, and pollution control applications.
Because of its versatility and corrosion resistance, Hastelloy C-22 is widely selected for critical industrial process systems.
Key Features of Alloy C-22
Outstanding Corrosion Resistance
Excellent resistance to both oxidizing and reducing chemical environments.
Pitting & Crevice Corrosion Resistance
Provides superior protection in chloride-containing environments.
High Purity Process Compatibility
Suitable for pharmaceutical and semiconductor manufacturing systems.
Excellent Fabricability
Can be welded and fabricated into complex equipment and piping systems.
Typical Applications
In addition to traditional chemical processing, pharmaceutical, and environmental protection applications, semiconductor equipment manufacturers are increasingly evaluating Hastelloy C-22 as a replacement for SS316L in chemical gas and liquid delivery systems, piping, and fittings used in chip fabrication facilities. As semiconductor manufacturing continues to demand higher corrosion resistance and purity standards, this emerging application is expected to become an important growth area for Hastelloy C-22.
Chemical Processing Equipment
Reactors, tanks, vessels, and process piping systems.
Semiconductor Manufacturing
Chemical gas and liquid delivery systems, tubing, valves, and fittings.
Pharmaceutical Equipment
High purity process systems and production facilities.
Pollution Control Systems
Scrubbers and flue gas desulfurization equipment.
Acid Processing Plants
Equipment handling mixed acids and aggressive chemicals.
Marine & Offshore Applications
Corrosion resistant components exposed to seawater environments.
Available Alloy C-22 Products
SOUTHERLY ALLOY supplies a complete range of Alloy C-22 products manufactured to international standards. Available forms include seamless pipe, welded pipe, tube, plate, sheet, round bar, fittings, and flanges for highly corrosive chemical processing, semiconductor, and pharmaceutical applications.
Hastelloy C-22 Pipe
Seamless and welded pipe for corrosive process systems.
Hastelloy C-22 Tube
High purity tubing for chemical and semiconductor industries.
Hastelloy C-22 Round Bar
Forged and hot rolled bars for machining applications.
Hastelloy C-22 Plate
Plate and sheet products for fabrication and equipment manufacturing.
Hastelloy C-22 Fittings
Elbows, tees, reducers, and custom piping components.
Hastelloy C-22 Flanges
Forged flanges for chemical processing and high purity systems.
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