Hastelloy C-22 | UNS N06022 | Werkstoff Nr 2.4602 | ASTM B574 | DIN 17753 | ASME SB 906 | ASME Code Case 2226 | ISO 6208
Super alloys contain a number of elements in a variety of combinations to achieve the desired result. They have good creep and oxidation resistance. They are available in different shapes, and can be used at very high temperatures and mechanical stress, and also where high surface stability is required. Cobalt-based, nickel-based, and iron-based alloys are three types of super alloys. All of these can be used at temperatures above 540°C (1000°F).
Hastelloy C22 is a nickel-chromium-molybdenum alloy. It has high resistance corrosion and metallurgical stability. It is not sensitized during heating or welding. The following datasheet gives more details about Hastelloy C22.
The following table shows the chemical composition of Hastelloy C22.
|Cobalt, Co||2.5 min|
|Manganese. Mn||0.5 max|
|Vanadium, V||0.35 min|
|Silicon, Si||0.08 max|
|Phosphorus, P||0.02 max|
|Sulfur, S||0.02 max|
|Carbon, C||0.015 max|
The physical properties of Hastelloy C22 are outlined in the following table.
|Density||8.69 g/cm³||0.314 lb/in³|
The mechanical properties of Hastelloy C22 are displayed in the following table.
|Elastic modulus||206 MPa||29878 psi|
The thermal properties of Hastelloy C22 are given in the following table.
|Thermal conductivity (at 100°C/212°F)||11.1 W/mK||6.4 BTU in/hr.ft².°F|
Hastelloy C22 can be machined using high-speed steel tooling. Carbide tools are used for milling or turning. Machining operations can be performed using conventional coolants.
Hastelloy C22 can be easily hot or cold formed followed by heat treatment.
Except submerged arc welding method, Hastelloy C22 can be welded using all other welding methods.
Hastelloy C22 is heat treated by annealing at 1122°C (2050°F) followed by quenching.
Hastelloy C22 is hot forged at 1149°C (2100°F) followed by heat treatment.
Hastelloy C22 has good hot working capacity.
Hastelloy C22 has cold working capacity.
Hastelloy C22 is aged at 510 to 1038°C (950 to 1900°F) to increase its tensile strength and hardness. However, V-notch impact strength can be degraded if aging is done above 760°C (1400°F).
Hastelloy C22 cannot be hardened by heat treatment or cold working.
Hastelloy C22 is used for manufacturing different types of chemical process equipments such as:
- Chlorination systems
- Flue gas scrubbers
- Outlet ducting and stack liners for power plants, pulp and paper bleach plants, sulfur dioxide scrubbers, and weld overlay of less corrosion resistant metals
- Acid production and pickling systems.
- ASTM B366
- ASTM B564
- ASTM B574
- ASTM B575
- ASTM B619
- ASTM B622
- DIN 17753
- UNS N06022
- Werkstoff Nr 2.4602
- ASME SB 906
- ASME Code Case 2226
- ISO 6208
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