Cold-Drawn Corrosion Resistant ASTM B622 Hastelloy C22 Nickel Alloy Seamless Tube
Alloy C22 is an improved nickel-base alloy designed for use in aggressive industrial environments. This alloy offers excellent resistance to pitting and crevice corrosion in oxidizing and acid chloride environments, and is practically immune to chloride stress corrosion cracking (SCC).
- Superior overall corrosion resistance compared to Alloy C-276
- Outstanding resistance to chloride pitting, crevice corrosion and stress corrosion cracking
- Excellent performance in oxidizing aqueous environments including wet chlorine and mixtures containing nitric acid with chloride ions
| Element | Ni | Cr | Mo | Mn | Si | C | S | P | Cu | V | W | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MIN | -- | 20.0 | 12.5 | -- | -- | -- | -- | -- | -- | -- | 2.5 | -- |
| MAX | balance | 22.5 | 14.5 | 0.5 | 0.08 | 0.015 | 0.02 | 0.02 | 2.5 | 0.35 | 3.5 | 6.0 |
| Temperature (°F) | 70 | 200 | 400 | 600 | 800 | 1000 | 1200 | 1400 |
|---|---|---|---|---|---|---|---|---|
| Ultimate Tensile Strength (ksi) | 114 | 107 | 98 | 95 | 92 | 88 | 83 | 76 |
| 0.2% Yield Strength (ksi) | 54 | 49 | 41 | 36 | 35 | 34 | 32 | 31 |
| Elongation (%) | 62 | 65 | 66 | 68 | 68 | 67 | 69 | 68 |
| Hardness MAX (HRB) | 95 | -- | -- | -- | -- | -- | -- | -- |
| Product Form | Standard |
|---|---|
| Pipe Seamless | B622 |
| Pipe Welded | B619 |
| Tube Seamless | B622 |
| Tube Welded | B626 |
| Sheet/Plate | B575 |
| Bar | B574 |
| Forging | B564 |
| Fitting | B366 |
- Pharmaceutical industries for corrosion-resistant fittings and tubing
- Cellophane manufacturing
- Chlorination systems
- Pesticide production
- Incineration scrubber systems
- Chemical process industry equipment including flue gas scrubbers, sulfur dioxide scrubbers, and pulp and paper bleach plants
- Waste water processing systems
- Nuclear fuel reprocessing
Although ductile enough for 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 2020-2150°F followed by rapid quench to avoid formation of detrimental phases. Welding can be done by gas tungsten-arc, gas metal-arc and shielded metal-arc processes.
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