1. Introduce
– Ni – Cr – Mo – (W) alloy with enhanced resistance to pitting, crevice corrosion, and stress corrosion cracking
– Higher Cr content, lower Mo content compared to Hastelloy C276
(C22 : Cr 20.00 ~ 22.00% , Mo 12.50 ~ 14.50%) / (C276 : Cr 16.50%, Mo 15.00 ~ 17.00)
– Excellent resistance to a variety of corrosive environments including acids and chlorides, especially effective in applications with hydrochloric, sulfuric and phosphoric acids
– UNS N06022
* UNS
- Abbreviation of Unified Numbering Systems for Metals and Alloys
- Unified numbering system for metals and alloys
- A representative number that is compatible with metals and alloys defined in many material – related codes such as ASTM, AISI, ASME, AWS, etc.
* N : Nickel and nickel alloys
* UNS N06022 : 06XXX : Chromium (Hastelloy, Inconel, some with additional element)
* Hastelloy
– Corrosion – resistant alloy with Ni as the main component
– Excellent machinability and weldability
* Hastelloy C
(1) Main composition
– Ni – Cr – Mo
(2) Characteristics
– Oxidation resistance alloy : Excellent oxidation resistance due to large amount of Cr added
– Excellent corrosion resistance in oxidizing atmospheres such as nitric acid and chlorine due to the addition of a large amount of Cr
2. Property
– General corrosion, erosion, crevice corrosion, intergranular corrosion, stress corrosion cracking resistance, good weldability
– Good corrosion resistance to hydrochloric acid, sulfuric acid, phosphoric acid, and chlorides
| Element | Impact |
|---|---|
| Ni | Provides corrosion resistance |
| Cr | Provides high temperature hardness and corrosion resistance |
| Mo | Provides sulfuric acid, hydrochloric acid, high temperature oxidation corrosion resistance, high temperature hardness, weldability, and machinability |
| W | Provides strength, corrosion resistance |
[Hastelloy C22 Chemical Composition (%)]
| Ni | Cr | Fe | C |
|---|---|---|---|
| 52.86 ~ 60.15 | 20.00 ~ 22.50 | 2.00 ~ 6.00 | Max. 0.02 |
| Si | Mn | Mo | S |
|---|---|---|---|
| Max. 0.08 | Max. 0.50 | 12.50 ~ 14.50 | Max. 0.02 |
| Co | W | P | V |
|---|---|---|---|
| Min. 2.50 | 2.50 ~ 3.50 | Max. 0.02 | Min. 0.35 |
[Hastelloy C22 Mechanical Properties]
| Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|
| Min. 690 | Min. 310 | Min. 45.00 |
[Hastelloy C22 Physical Properties]
| Density (g/cm³) | Melting Range (℃) | Specific Heat (0~100℃) / J/kg*℃ |
|---|---|---|
| 8.61 | 1351 ~ 1387 | 381 |
3. Standard & Specification
– Specification : UNS N06022
| Product Form | ASTM | ASME | AWS |
|---|---|---|---|
| Pipe, Tube | B619, B622, B626 | SB619, SB775, SB622 | – |
| Plate, Sheet, Strip | B575 | SB575, SB906 | – |
| Bar, Wire, Forgings | B574, B462, B564 | SB654, SB574 | – |
| Fittings | – | SB-366 | – |
| Welding materials | – | – | A5.14ERNiCrMo-10 |
4. Available Form
– Pipe & Tube
– Bar
– Plate & Sheet
– Wire
– Forgings
5. Application & Product
– Chemical, Pharmaceutical, Petrochemical, Gastal Sulfur, Medical
| Application | Product |
|---|---|
| Chemical | Chemical Reactors, Heat Exchangers |
| Pharmaceutical | Tanks, Pipes, Valves |
| Petrochemical | Petrochemical plants |
| Gas desulfurization | Flue gas desulfurization systems |
| Medical | Medical implants, surgical tools, dental tools |
(1) Chemical reactors / (2) Petrochemical plants / (3) Valves / (4) Implants / (5) Surgical tools
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