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Description:

1.Hastelloy C22/ N06022 bolts and nuts
2.GB, ISO, DIN, BS, ANSI/ASME, JIS
3, M6-M100(1/4-4inch)
4, incoloy, monel, Inconel, ZrHastelloy® C-22

UNS Number N06022

 

Other common names: Alloy C22

Hastelloy C22, also known as alloy C22, is a versatileaustenitic nickel-chromium-molybdenum-tungsten alloy with enhancedresistance to pitting, crevice corrosion and stress corrosioncracking. The high chromium content provides good resistance tooxidizing media while the molybdenum and tungsten content give goodresistance to reducing media. This nickel steel alloy also hasexcellent resistance to oxidizing aqueous media including wetchlorine and mixtures containing nitric acid or oxidizing acidswith chlorine ions. Other corrosives Hastelloy C-22 has resistanceto are oxidizing acid chlorides, wet chlorine, formic and aceticacids, ferric and cupric chlorides, sea water, brine and many mixedor contaminated chemical solutions, both organic and inorganic.This nickel alloy also offers optimum resistance to environmentswhere reducing and oxidizing conditions are encountered in processstreams. This is beneficial in multi- purpose plants where such“upset” conditions occur frequently.

This nickel alloy resists the formation of grain-boundaryprecipitates in the weld heat-affected zone, thus making itsuitable for most chemical process applications in the as-weldedcondition.

Alloy C-22 should not be used in service temperatures above1250° F due to the formation of detrimental phases which form abovethis temperature.

In what forms is Hastelloy C22 Available at MegaMex?

• Sheet
• Plate
• Bar
• Pipe & Tube (welded & seamless)
• Fittings (i.e. flanges, slip-ons, blinds, weld-necks,lapjoints, long welding necks, socket welds, elbows, tees,stub-ends, returns, caps, crosses, reducers, and pipe nipples)
• Wire

What are the characteristics of HastelloyC22?

• Resistant to pitting, crevice corrosion and stress corrosioncracking
• Outstanding resistance to both reducing and oxidizingmedia
• Excellent resistance to oxidizing aqueous media
• Exceptional resistance to a wide variety of chemical processenvironments including strong oxidizers such as ferric acids,acetic anhydride, and seawater and brine solutions
• Resists the formation of grain-boundary precipitates in theweld heat-affected zone
• Excellent weldability

Chemical Composition, %

C	Cr	Co	Fe	Mn	Mo	Ni	P
.010 max	20-22.5	2.5 max	2.0-6.0	.50 max	12.5-14.5	Balance	.02 max
Si	S	W	V
.08 max	.02 max	2.5-3.5	.35 max

In what applications is Hastelloy C22 used?

• Pharmaceutical industries use alloy C-22 fittings and tubing toavoid contamination caused by corrosion related failures
• Cellophane manufacturing
• Chlorination systems
• Pesticide production
• Incineration scrubber systems
• Chemical process industry in equipment like flue gas scrubbers,chlorination systems, sulfur dioxide scrubbers, pulp and paperbleach plants, pickling systems, and nuclear fuel reprocessing
• Waste water processing

 

Fabrication of Hastelloy C-22

 

Although ductile enough to be formed by cold working,intermediate annealing may be necessary due to work hardening.Forging should be performed between 1750-2050° F followed by rapidcooling. Annealing can be performed at a temperature range between2020-2150° F followed by a rapid quench. Cooling at an acceleratedrate avoids the formation of detrimental phases which form between1400-1800° F. Welding can be done by gas tungsten-arc, gasmetal-arc and shielded metal-arc processes.

For more information on fabrication and machining, clickhere.

ASTM Specifications

Pipe Smls	Pipe Welded	Tube Smls	Tube Welded	Sheet/Plate	Bar	Forging	Fitting
B622	B619	B622	B626	B575	B574	B564	B366

Mechanical Properties
Typical Room Temperature Tensile Properties of AnnealedMaterial

Product Form	Tensile (ksi)	.2% Yield (ksi)	Elongation %	Hardness (HRb)
Plate (.25”-1.75”)	112	53	62	89
Sheet (.038”-.15”)	122	63	54	93
Bar (.50”-5.50”)	115	55	60	89