Hastelloy C-22: Complete Properties & Application Guide

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Overview

Hastelloy C-22 (UNS N06022 / W.Nr. 2.4602) is a versatile nickel-chromium-molybdenum-tungsten alloy with better overall corrosion resistance than C-276, especially in oxidizing environments. The high chromium content provides superior resistance to oxidizing media while molybdenum and tungsten offer protection in reducing environments.

Chemical Composition

The chemical composition of Hastelloy C-22 is carefully controlled to achieve its unique combination of properties and performance characteristics.

Element	Min %	Max %
Nickel (Ni)	50.0	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
Carbon (C)	—	0.015
Cobalt (Co)	—	2.5
Vanadium (V)	—	0.35

Mechanical Properties at Room Temperature

The mechanical properties of Hastelloy C-22 vary depending on product form and heat treatment condition. The data below represents typical values for solution-annealed material.

Property	Value
Tensile Strength	760 MPa
Yield Strength (0.2% offset)	350 MPa
Elongation in 2 inches	62%
Density	8.69 g/cm3
Melting Point	1357 °C
Max Service Temperature	1040 °C

Corrosion Resistance

Outstanding resistance to both oxidizing and reducing environments. Superior to C-276 in mixed acid environments. Excellent resistance to localized corrosion including pitting, crevice corrosion, and stress corrosion cracking. Resistant to chloride-induced attack.

Applications

The unique combination of properties makes Hastelloy C-22 suitable for a wide range of demanding applications:

• Chemical Processing: Reactors, heat exchangers, and piping handling aggressive mixed acid environments.
• Flue Gas Desulfurization: Scrubber components in FGD systems for power plants.
• Pharmaceutical: Process equipment requiring high purity and corrosion resistance.
• Waste Incineration: Scrubbers and ductwork in waste-to-energy plants.
• Marine Engineering: Components exposed to seawater and marine atmospheres.

Available Product Forms

Hangbo Alloy Group manufactures and supplies Hastelloy C-22 in the following product forms, conforming to ASTM, AMS, and ASME specifications:

• Round Bars: Diameters from 6 mm to 300 mm, hot-finished or cold-drawn, solution annealed.
• Seamless Tubes & Pipes: Sizes from 6 mm OD to 219 mm OD, various wall thicknesses.
• Plates & Sheets: Thicknesses from 0.5 mm to 50 mm, hot-rolled or cold-rolled.
• Forgings: Custom flanges, rings, discs, and complex shapes per customer drawing.
• Welding Wire: Diameters 0.8 mm to 5.0 mm, precision-wound coils and spools.

Related Standards

Standard	Description
ASTM B575	Plate, Sheet, and Strip
ASTM B619	Welded Pipe
ASTM B622	Seamless Pipe and Tube
ASTM B574	Bar and Rod
ASTM B564	Forgings
AWS A5.14	Welding Wire (ERNiCrMo-10)

Contact Us for Hastelloy C-22

Hangbo Alloy Group maintains extensive inventory of Hastelloy C-22 in all standard product forms. We can provide mill test certificates, third-party inspection reports (SGS, TUV), and custom processing services.

For quotations, material certifications, or technical consultation, contact our sales team or call +86-136-1165-6360. We typically respond within 10 minutes.