Hastelloy C-22 / 2.4602

The alloy is a nickel-based superalloy composed of nickel, molybdenum, cobalt, tungsten and other elements. The nickel content is about 60%. It is a versatile Ni-cr-Mo alloy that offers better overall corrosion resistance than other existing Ni-Cr-Mo alloys, including Hastelloy C-276, C4 and 625 alloys. Hastelloy C22 alloys have excellent resistance to pitting, crevice corrosion and stress corrosion cracking. It has excellent antioxidant capacity to aqueous media, including wet chlorine, nitric acid, or oxidizing acid mixtures containing chloride ions. At the same time, Hastelloy C22 also has ideal resistance to the reducing and oxidizing environments encountered during the process. Because of this versatile performance, it can be used in some troublesome environment, or in multiple production purpose plant applications. Hastelloy C22 is exceptionally resistant to a variety of chemical environments, including highly oxidizing substances such as ferric chloride, copper chloride, chlorine, and thermal pollution solutions. Liquid (organic and inorganic), formic acid, acetic acid, acetic anhydride, seawater and salt solution, etc. Hastelloy C22 is resistant to grain boundary 1 precipitation formation in the welding heat affected zone, which makes it suitable for many chemical process applications in the welding state.

Applications:

C22 nickel alloy finds use in a wide range of applications, including but not limited to:

Chemical Processing: C22 is widely employed in chemical processing equipment, such as reactors, vessels, and heat exchangers, where resistance to corrosive chemicals is essential.
Petrochemical Industry: C22 is used in various petrochemical applications, including piping systems, valves, and fittings exposed to aggressive hydrocarbon media.
Pharmaceuticals: C22 is suitable for pharmaceutical and biotechnology applications where the use of corrosion-resistant materials is critical.
Pollution Control: C22 is used in air pollution control systems and flue gas desulfurization (FGD) units due to its ability to resist acidic gases and high-temperature environments.
Marine Environments: C22 is utilized in marine engineering, seawater piping, and offshore structures due to its resistance to corrosive seawater and marine atmospheres.

Product Forms:

C22 nickel alloy is available in various product forms, including:

Sheets and Plates: C22 sheets and plates are used in fabricating corrosion-resistant components for chemical processing and petrochemical applications.
Pipes and Tubes: C22 pipes and tubes are employed in various corrosive environments, providing reliable and durable solutions for fluid transport.
Bars and Rods: C22 bars and rods find use in machining and fabrication of specialized components requiring high corrosion resistance.
Fittings and Flanges: C22 fittings and flanges are essential in constructing corrosion-resistant piping systems for critical applications.

Chemical specifications %

C22 – UNS N06022
Element	Simbol	Maximum
Carbon	C	0,015
Manganese	Mn	0,50
Tungsten	W	2,5-3,5
Sulfur	S	0,020
Silicon	Si	0,08
Nickel	Ni	56,0
Chrome	Cr	20,0-22,5
Molybdenum	Mo	12,5-14,5
Cobalt	Co	2,5
Iron	Fe	2,0-6,0
Phosphorus	P	0,02
Vanadium	V	0,35

Mechanical Properties

Tensile strength:	800	N/mm²
Yield strength 0,2% :	407	≥ N/mm²
Elongation:	57	≥ %
Hardness HB30:	93-95	≤ HB

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Hastelloy C-22 / 2.4602

Applications:

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Mechanical Properties

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