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Specification 

Other common names:

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 conditions occur frequently.

This nickel alloy resists the formation of grain-boundary precipitates in the weld heat-affected zone, thus making it suitable for most chemical process applications in the as-welded condition.

Alloy C-22 should not be used in service temperatures above 1250° F due to the formation of detrimental phases which form above this temperature.


In what forms is Hastelloy C22 ?

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)


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(%)

CCrCoFeMnMoNiP
.010 max20-22.52.5 max2.0-6.0.50 max12.5-14.5Balance.02 max
SiSWV



.08 max.02 max2.5-3.5.35 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.


ASTM Specifications

Pipe SmlsPipe WeldedTube SmlsTube WeldedSheet/PlateBarForgingFitting
B622B619B622B626B575B574B564B366


Mechanical Properties

Typical Room Temperature Tensile Properties of Annealed Material

Product FormTensile (ksi).2% Yield (ksi)Elongation %Hardness (HRb)
Plate (.25”-1.75”)112536289
Sheet (.038”-.15”)122635493
Bar (.50”-5.50”)115556089


About us

WHO WE ARE:

Kuncheng Materials is a proactive organization dedicated to providing high-quality products that meet and exceed customer specific requirements, thereby ensuring complete customer satisfaction. We are the professional manufacturer and supplier of metal material. 

WHAT WE CAN SUPPLY?

As a manufacturer with 25 years experience in high-temperature alloy products, we have a professional service team to provide high standard of technical support, timely and qualified delivery, customs clearance assistance, and reliable after-sales services, etc.

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FAQ 

Q: Are you trading company or Manufactuer?

A: Of course, we are manufactuer. We are in field of honed tube and chrome rod more than 20 years.

Q: What is your delivery time?

A: As normally, it is 25~60 days after you confirm the order. If your order is urgent, we would like to try our best to meet your requests.

Q:What is your main payment term?

A: They are T/T and L/C. Like 30% advance payment via T/T, balance pay after receive copy BL; 100% irrevocable L/C at sight. If you have any other requests, we can talk it again.

Q:What is your main market?

A:America, India, Korea, Pakistan, Turkey, Iran,Australian and so on.

Q: Why we choose you as our supplier? 

A: All of our clients have reorders from us.Give us one order, you can feel our price, quality and service. Then, you will know us clearly.

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