Hastelloy C-22 (C22) Super Alloy (UNS N06022) is a highly corrosion-resistant nickel alloy

Product Detail

WHY C-22?

C-22 is used in severely corrosive media with high chloride and temperature applications such as buffer solutions, active pharmaceutical ingredients (API), fabric softeners, cleaning supplies, and fish, soy and chili sauce. C-22 is a great alternative when superaustenitic stainless steels (AL-6XN®, 904L, and 254 SMO®) and duplex stainless steels (2205 and 2507) will not withstand extremely aggressive media. This is because it is a nickel-chromium-molybdenum-tungsten alloy with better overall resistance to uniform and localized corrosion than any other Ni-Cr-Mo alloy, like Hastelloy C-276, C-4, and alloy 625. This alloy is recognized by the ASME BPE standard, which identifies several specifications in Part MM (Metallic Materials) and by U. S. Food and Drug Administration (FDA).

1. GOOD MANUFACTURING PRACTICE

Choosing the right sanitary equipment and materials to avoid corrosion is a best practice for most processing environments.

2. NO MICROBIAL CONTAMINATION

No crevice and pitting corrosion, no product accretion.

3. PRODUCT AVAILABILITY

CSI Stocks over 65,000 feet of tubing and thousands of fittings.

4. AVOID EQUIPMENT REPLACEMENT

Super Alloys provide a good return on investment by reducing product loss and maintenance time repairing and replacing corroded parts.

HASTELLOY ADVANTAGES

Every material has a threshold limit, and when superaustenitic and duplex such as AL-6XN, 254SMO, 904L, 2507, and 2205's threshold is reached, nickel-based alloy Hastelloy C-22/Alloy 22 is the best option. Hastelloy C-22 can withstand very aggressive conditions, surpassing the capabilities of AL-6XN and similar alloys.

1. CORROSION RESISTANCE

Hastelloy C-22 has excellent resistance in oxidizing and reducing environments. It consistently shows good results when exposed to strong oxidizers, such as ferric and cupric chlorides, chlorine, organic and inorganic hot contaminated solutions, formic and acetic acids, acetic anhydride, and seawater and brine solutions. PREN The Pitting Resistance Equivalent Number (PREN or PRE) is used as a guide for comparing and ranking a material’s corrosion resistance. The PRE Number is calculated from a formula based on chemical composition. In today’s market, there is a wide range of austenitic, superaustenitic, duplex, superduplex, and nickel-based alloys. Besides corrosion resistance, other factors should be taken into consideration, such as commercial availability, appearance, good mechanical properties, and fabrication characteristics.

Alloy	UNS	EN Number	Cr	Ni	Mo	N	PRE Number
625	N06626	2.4856	20.0-23.0	58	8.0-10.0	-	41	Nickel
C-276	N10276	2.4819	14.5-16.5	57	15.0-17.0	-	45	Nickel
C-22®	N06022	2.4602	20.0-22.5	56	12.5-14.5	-	46	Nickel

What are 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

Chemical Composition, %

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

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.

hastelloy c 276 nickel alloy bar 1.prominent corrosion resistance to high concentration chlorate 2.ISO BV 3.ASTM standard Hastelloy c 276 nickel alloy bar Nickel-Molybdenum-Chromium alloy/ Hastelloy C-276/ UNS N10276/ W.Nr.2.4819/ Alloy C-276/ Nickel C-276 Product Form:wire,bar,sheet/plate,forging,pipe/tube,etc. Alloy C-276 is a tungsten-added nickel-molybdenum-chromium alloy designed to offer excellent corrosion resistance in wide range of severe environments. C-276 is widely used in the chemical field and petrifaction field, such as the element of chloride organic and catalyzes system. This Alloy is especially suit for high temperature environment, impure inorganic acid and organic acid (such as formic acid and acetic acid), sea-water corrosion environment. Hastelloy C-276 Chemical composition

Alloy	%	Ni	Cr	Mo	Fe	W	Co	C	Mn	Si	V	P	S
C276	Min.	balance	14.5	15	4	3
C276	Max.	balance	16.5	17	7	4.5	2.5	0.01	1	0.08	0.35	0.04	0.03

Hastelloy C-276 Physical properties

Density	8.9 g/cm³
Melting point	1325-1370 °C
HRB	Max.100

Hastelloy C-276 Alloy minimum mechanical properties in the room temperature

Alloy state	Tensile strength Rm N/mm²	Yield strength R P0. 2N/mm²	Elongation A 5 %
C-276	690	283	40

Hastelloy C-276 Application field C276 is widely used in the chemical field and petrifaction field, such as the element of chloride organic and catalyze system.This material especially suit for high temperature environment, impure inorganic acid and organic acid (such as formic acid and acetic acid), sea-water corrosion environment. Hastelloy C-276 Other application field 1. The digester and bleacher in the use of paper pulp and paper making industry. 2.Absorption tower, re-heater and fan in the FGD system. 3. The equipment and parts in the use of acidic gas environments. 4. Acetic acid and anhydride reaction generator 5. Sulfur acid cooling 6.MDI 7.Manufacture and processing of impure phosphoric acid. Hastelloy C-276 Standard