General Information
Chemical Composition
Physical Properties
Mechanical Properties
General Information
Hastelloy C22, also known as alloy C22, is a versatile austenitic nickel-chromium-molybdenum-tungsten alloy with enhanced resistance to pitting, crevice corrosion and stress corrosion cracking. The high chromium content provides good resistance to oxidizing media while the molybdenum and tungsten content give good resistance to reducing media. This nickel steel alloy also has excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chlorine ions. Other corrosives Hastelloy C-22 has resistance to are oxidizing acid chlorides, wet chlorine, formic and acetic acids, ferric and cupric chlorides, sea water, brine and many mixed or contaminated chemical solutions, both organic and inorganic. This nickel alloy also offers optimum resistance to environments where reducing and oxidizing conditions are encountered in process streams. This is beneficial in multi- purpose plants where such “upset” conditions occur frequently.

The characteristics of Hastelloy C22

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

Standard Inventory Specifications

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

Common Trade Names

Alloy C-22

Common Applications of C22

Pharmaceutical industries use alloy C-22 fittings and tubing to avoid 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 paper bleach plants, pickling systems, and nuclear fuel reprocessing
Waste water processing

Chemical Composition

C22 Chemical Composition

Element

Percent by Weight

Ni

Nickel

Balance

Cr

Chrom

20-22.5

Co

2.5 max

C

Carbon

0.01 max

Mn

Manganese

0.5 max

Mo

12.5-14.5

Fe

Iron

2.0-6.0

S

Sulfur

0.0 max

P

0.02 max

Si

Silicon

0.08 max

W

2.5-3.5 – 34.00

V

0.35 max

Physical Properties

Physical Properties of C22

Melting Point (°C)	Density	Modulus of Elasticity in Tension
480 – 570	8.69g/cm3	206 GPa

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 rapid cooling. Annealing can be performed at a temperature range between 2020-2150° F followed by a rapid quench. Cooling at an accelerated rate avoids the formation of detrimental phases which form between 1400-1800° F. Welding can be done by gas tungsten-arc, gas metal-arc and shielded metal-arc processes.

Mechanical Properties

Mechanical Properties of C22

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

The characteristics of Hastelloy C22

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

C22 Pipes
C22 Fittings
C22 Bars
C22 Sheets & Plates
C22 Coils & Strips
C22 Wires

C22 Seamless Pipe
Standard: ASTM, JIS, DIN, EU…
Grade: C22…
Size: OD: Φ4-Φ1219mm; WT:…
Introduction: Wisine its production capacity of stainless steel seamless pipe, roughly 2100 tons per month. As per your requirement…