1. Introduce
– Ni-Cr alloy with Ti and Al added for increased strength
– Excellent corrosion resistance at high temperatures up to 1000°C
– UNS N07722
* Inconel 722 vs Other alloys
| Property | Comparison |
|---|---|
| Corrosion and carbonization resistance | Inconel 722 > Inconel 718 |
| Strength and stress corrosion cracking resistance | Inconel 722 > Inconel 625 |
| High temperature oxidation and carburization resistance | Inconel 722 > Hastelloy C-276 |
* Inconel
- Features
– Resists oxidation and submersion in oxidizing and sulfurizing atmospheres above 900℃
– Non-corrosive to organic and salt solutions
– Excellent mechanical properties such as tensile and yield strength up to about 600℃ - Applications
– High temperature heat resistant equipment(Heat treatment furnace, boiler, jet engine parts, electric heater parts) - Types
– Incoenl 600/601, Inconel 625, Inconel 690, Inconel 718, Inconel 718+, Inconel X-750, etc.
* UNS
- Abbreviation for Unified Numbering Systems for Metals and Alloys
- Unified unique 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 N07722 : 07XXX : Chromium(Precipitation-hardenable alloy)
2. Property
– High strength, corrosion resistance, heat resistance, oxidation resistance, thermal stability
| Element | Impact |
|---|---|
| Cr | Provides corrosion resistance, oxidation resistance |
[Inconel 722 Chemical Composition (%)]
| Ni | Cr | Fe | C | Al |
|---|---|---|---|---|
| 68.59 ~ 78.60 | 14.00 ~ 17.00 | 5.00 ~ 9.00 | Max. 0.08 | 0.40 ~ 1.00 |
| Ti | Cu | Si | Mn | S |
|---|---|---|---|---|
| 2.00 ~ 2.75 | Max. 0.50 | Max. 0.07 | Max. 1.00 | Max. 0.01 |
[Inconel 722 Mechanical Properties]
| Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) |
|---|---|---|
| Min. 862 | Min. 565 | 15 |
[Inconel 722 Physical Properties]
| Density (g/㎤) | Melting Range (℃) |
|---|---|
| 8.23 | 1399 |
3. Standard & Specification
– Specification : UNS N07722
| ASTM | B637, B670 |
| SAE | AMS 5541, 5714 |
| ASME | SB564 |
| DIN | NICR16FETI |
| GE | B50T1233 |
4. Available Form
– Bar, Rod
– Plate, Sheet, Strip
– Forgings
– Pipe, Tube
– Coil, Wire
5. Application & Product
– Aerospace, Oil & Gas, Chemical
| Application | Product |
|---|---|
| Aerospace | Aircraft frames, Casings, Flanges, Turbine blades |
| Oil & Gas | Drills, Downhole tools |
| Chemical | Reactors, Heat exchangers, Piping |
(1) Casing / (2) Downhole Tools / (3) Flange
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