Hastelloy C22

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Product Description

Hastelloy C22

Hastelloy C22

•outstanding resistance to a wide range of corrosive media, under oxidizing and reducing conditions
•excellent resistance to pitting, crevice corrosion, and stress-corrosion cracking.

Density: 8.69
Corrosion resistance

The chemical composition of Hastelloy C22 has been designed to give it outstanding corrosion resistance in as wide a range of media as possible, both oxidizing and reducing. The high chromiurn content of the alloy makes it particularly suitable for oxidizing conditions, including wet chlorine gas, hypochlorite solutions or oxidizing acids. It is remarkably resistant to localized attack by halide ions, even under severe conditions of low pH and high temperatures. It resists attack in media contaminated by oxidizing chlorides such as ferric chloride or cupric chloride. Hastelloy C22 is also resistant to many reducing media. As a result it can be used for equipment in polyvalent chemical plant where widely varying conditions may be encountered. The very low carbon content of Alloy C22, together with its balanced composition, reduce the tendency to formation of grain-boundary precipitates in the heat-affected zone during welding, thus
making it suitable in the as-welded condition for many applications in the chemical process industry.

Applications of Hastelloy C22:

The versatile nature of Hastelloy C22 combined with its excellent mechanical properties mean that it can be used in a wide variety of applications, including:
•organic syntheses
•flue gas desulphurization
•electrolytic galvanizing
•plate heat exchangers
•fine chemicals production
•incineration plants
•pharmaceutical intermediates
•combustion-resistant alloy for high pressure oxygen applications

Chemical composition

 Ni  Cr  Fe  C  Mn  Si  Mo  W  Co  V  P  S
 min(%)  bal.  20.0  2.0  12.5  2.5
 max(%)  22.5  6.0  0.015  0.50  0.08  14.5  3.5  2.5  0.35 0.02 0.02

Mechanical properties

 Condition  Yield Strength(Mpa)  Tensile Strength(Mpa)  Elongation(%)  Hardness(HB)
 ASTM Min Value  Solution Annealed  310 690 45
 Typical Values at RT  Solution Annealed  402 794 57 197

International Specification Comparison chart

 Material  Round Bar  Plate  Pipe
 Seamless  Welded
 B574  B575  B622  B619/B626
 ASME  SB574  SB575  SB622  SB619/SB626
 JIS  NW6022  H4553  H4551  H4552
 DIN  2.4602  17752  17750  17751 17751

Product: Sheet, Coil, Pipe, Bar, Wire and Forgings