Hastelloy C-22
Introduction
Overview of Hastelloy C-22 Alloy
Hastelloy C-22 alloy (UNS N06022) is one of the well-known and well-proven nickel-chromium-molybdenum materials, the chief attributes of which are resistance to both oxidizing and non-oxidizing chemicals, and protection from pitting, crevice attack, and stress corrosion cracking.
Its high chromium content provides much higher resistance to oxidizing media than the family standard, C-276 alloy, and imparts exceptional resistance to chloride-induced pitting, an insidious and unpredictable form of attack, to which the stainless steels are prone.
Like other nickel alloys, Hastelloy C-22 alloy is very ductile, exhibits excellent weldability, and is easily fabricated into industrial components. It is available in the form of plates, sheets, strips, billets, bars, wires, pipes, tubes, and covered electrodes. Typical chemical process industry (CPI) applications include reactors, heat exchangers, and columns.
Features of Hastelloy C-22
HASTELLOY alloy C-22 is a nickel-chromium-molybdenum alloy with enhanced resistance to pitting, crevice corrosion and stress corrosion cracking.
It resists the formation of grain boundary precipitates in the weld-heat affected zone making it suitable for use in the as-welded condition. C-22 has outstanding resistance to both reducing and oxidizing media and because of its resistibility can be used where “upset” conditions are likely to occur.
Hastelloy C-22 Alloy Applications
Alloy C-22 can be used in a variety of applications including:
- Springs
- Fasteners
- Seals
- Medical devices and components
- Flue gas equipment
Hastelloy C-22 Tags
- UNS Number: N06022
- Werkstoff Number: 2.4602
- Standards: ASTM B622, B619, B575
Hastelloy C-22 Quality Products
Technical Data
| STANDARD | WERKSTOFF NR. | UNS | GOST | AFNOR | JIS | BS | EN | OR |
| Alloy C-22 | 2.4602 | N06022 | – | – | – | – | – | – |
| C-22 Alloy Strip Chemical Composition (%) | |||||||||||
| C | Cr | Co | Fe | Mn | Mo | Ni | P | Si | S | W | V |
| 0.010 max | 20-22.5 | 2.5 max | 2.0-6.0 | 0.50 max | 12.5-14.5 | Balance | 0.02 max | 0.08 max | 0.02 max | 2.5-3.5 | 0.35 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.69 g/cm3 | 1399 °C (2550 °F) | 500-800Mpa | 200-400Mpa | 80% – 55% |
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