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Hastelloy C-22 Strips Industrial-Grade Alloy with Corrosion Resistance
Hastelloy C-22 Strips deliver premium industrial-grade nickel-chromium-molybdenum-tungsten alloy performance with exceptional corrosion resistance. These high-performance alloy strips excel in harsh oxidizing and reducing environments, outperforming many other Ni-Cr-Mo alloys like C-276 in pitting, crevice corrosion, and stress corrosion cracking resistance. Ideal for chemical processing, pollution control, and pharmaceutical applications, Hastelloy C-22 strips provide reliable durability, superior weldability, and versatility for demanding industrial uses.
- Overview
- Specification
- Applications
- FAQs
- Recommended Products
Superior Corrosion Resistance: Highly resistant to pitting, crevice corrosion, and stress corrosion cracking in both oxidizing and reducing environments.
High Thermal Stability: Maintains mechanical integrity even at elevated temperatures.
Excellent Fabricability: Easily formed, welded, and machined for a variety of industrial uses.
Chemical Inertness: Performs well in harsh chemical conditions, including acid processing environments.
Introduction
astelloy C-22 (UNS N06022) strips represent a versatile austenitic nickel-chromium-molybdenum-tungsten alloy engineered for outstanding resistance to uniform and localized corrosion in mixed industrial chemicals. With high chromium content (20-22.5%) for oxidizing media protection and molybdenum plus tungsten for reducing environments, these corrosion-resistant alloy strips maintain integrity in aggressive conditions including wet chlorine, oxidizing acid chlorides, seawater, brine solutions, formic acid, acetic acid, and ferric/cupric chlorides.
Available in annealed condition with excellent ductility and fabricability, Hastelloy C-22 strips resist grain-boundary precipitates in the weld heat-affected zone (HAZ), enabling as-welded use without post-weld heat treatment.
Material Composition and Properties
Hastelloy C-22 is primarily composed of nickel, with significant additions of chromium, molybdenum, and iron. It also contains tungsten and cobalt, further enhancing its corrosion-resistant properties. Key attributes of Hastelloy C-22 strips include:
Applications of Hastelloy C-22 Strips
The unique properties of Hastelloy C-22 strips make them suitable for numerous applications across different industries:
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Chemical Processing Industry: Used in reactors, heat exchangers, and piping systems to handle aggressive chemicals.
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Aerospace and Marine Engineering: Ideal for components exposed to high humidity, saline environments, and extreme temperatures.
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Pharmaceutical and Food Industry: Applied in sterilization equipment and process tanks where hygiene and corrosion resistance are critical.
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Flue Gas Scrubbing Systems: Utilized in pollution control devices to withstand highly acidic gases and harsh conditions.
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Power Plants: Used in geothermal and nuclear plants where extreme environmental conditions require superior material performance.
FAQs:
1.What is Hastelloy C-22 and why is it used for strips?
Hastelloy C-22 (UNS N06022) is a nickel-chromium-molybdenum-tungsten superalloy prized for its unmatched corrosion resistance in oxidizing and reducing conditions, making the strip form perfect for fabrication into gaskets, liners, bellows, and custom components.
2.How does Hastelloy C-22 compare to C-276?
C-22 offers better resistance to oxidizing media (higher Cr content) and similar or superior pitting/crevice performance in many chloride and wet chlorine environments.
3.What are the key corrosion resistance benefits?
It excels against pitting, crevice attack, stress corrosion cracking, wet chlorine, ferric/cupric chlorides, acetic/formic acids, and mixed chemical solutions.
4.What temperature range is suitable?
Typically -300°F to 1650°F (-184°C to 900°C), though avoid prolonged exposure above ~1250°F to prevent phase formation.
5.Is it weldable without post-weld treatment?
Yes — excellent weldability with minimal risk of grain-boundary precipitates in the HAZ.
6.Are custom sizes available?
Yes, industrial-grade Hastelloy C-22 strips can be supplied in various thicknesses, widths, and coils to meet specific project requirements.
