1. Introduce
– Ni alloy with excellent oxidation resistance, high temperature strength and machinability
* UNS
- Abbreviation of 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 N06002 : 06XXX : Chromium(Hastelloy, Inconel, some with additional element)
* Hastelloy
– A corrosion-resistant alloy with Ni as the main component
– Excellent machinability, weldability, and can be machined into various shapes
– Main types and characteristics
- Hastelloy B
* Main composition
– Ni-Mo
* Characteristics
– Hydrochloric acid-resistant alloy : Excellent hydrochloric acid resistance by containing a large amount of Mo
– Corrosion resistance in non-oxidizing atmosphere, excellent resistance to hydrogen chloride gas and reducing solution - Hastelloy C
* Main composition
– Ni-Cr-Mo
* Characteristics
– Oxidation resistance alloy : Excellent oxidation resistance by containing a large amount of Cr
– Excellent corrosion resistance in oxidizing atmospheres such as nitric acid and chlorine due to the addition of Cr - Hastelloy G
* Main composition
– Ni-Cr-Fe-Mo
* Characteristics
– Reinforced with Mo, Cu to improve corrosion resistance to sulfuric and phosphoric acids
– Good corrosion resistance in welds, good chloride intergranular corrosion resistance - Hastelloy X
* Main composition
– Ni-Cr-Fe-Mo
* Characteristics
– Alloy designed for good oxidation resistance at 1200℃, Good corrosion resistance in oxidizing, sulfuric and phosphoric acid atmospheres
2. Property
– Excellent oxidation resistance at temperatures up to 1200
High strength and ductility at high temperature for long time exposure
(Long-term exposure: 16,000 hours at temperatures of 650, 760, 870℃)
– Excellent stress corrosion cracking resistance
– Excellent moldability and weldability
| Element | Impact |
|---|---|
| Ni | Provides corrosion resistance |
| Cr | Provides oxidizing and non-oxidizing acid resistance |
| C | Combines with W, Mo, Cr, etc. to form carbides to provide grain boundary refinement, grain boundary strength |
| Si | Provides localized corrosion resistance |
| Mn, P | Provides machinability, weldability → Prevents grain boundary deposits from forming in the weld heat zone → Welded condition can be applied to chemical process applications |
| Mo | Provides localized corrosion resistance |
| Co | Provides strength, creep properties |
| W | Provides corrosion resistance |
[Hastelloy X Chemical Composition (%)]
| Ni | Cr | Fe | C | Al |
|---|---|---|---|---|
| 40.12 ~ 53.75 | 20.50 ~ 23.00 | 17.00 ~ 20.00 | 0.05 ~ 0.15 | Max. 0.50 |
| Ti | Cu | Si | Mn | Mo |
|---|---|---|---|---|
| Max. 0.15 | Max. 0.50 | Max. 1.00 | Max. 1.00 | 8.00 ~ 10.00 |
| S | Co | W | P | B |
|---|---|---|---|---|
| Max. 0.03 | 0.50 ~ 2.50 | 0.20 ~ 1.00 | Max. 0.04 | Max. 0.01 |
[Hastelloy X Mechanical Properties]
| Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) |
|---|---|---|
| Min. 655 | Min. 240 | 35 |
[Hastelloy X Physical Properties]
| Density (g/cm³) | Melting Range (℃) | Specific Heat (0-100℃), J/kg*℃ |
|---|---|---|
| 8.23 | 1260 ~ 1355 | 461 (20℃) |
3. Standard & Specification
– Specification : UNS N06002
| Product Form | ASTM | ASME | AWS |
|---|---|---|---|
| Bar, Rod | B572 | SB572 | – |
| Plate, Sheet, Strip | B435 | SB435 | – |
| Fittings | B366 | SB366 | – |
| Seamless Pipe, Tube | B622 | SB622 | – |
| Welded Pipe, Tube | B626 | SB626, B619, SB619 | – |
| Weld wire | – | – | A5.14ERNiCrMo-2 |
| Weld electrode | – | – | A5.11 ENiCrMo-2 |
4. Available Form
– Bar, Rod
– Plate, Sheet, Strip
– Fittings
– Seamless Pipe, Tube
– Welded Pipe, Tube
– Weld wire
5. Application & Product
– Aerospace, Petrochemical
| Application | Product |
|---|---|
| Aerospace | Combustor cans, Transition ducts, Afterburner parts, Rocket engine parts |
| Petrochemical | Furnace baffles |
(1) Combustor cans / (2) Transition ducts / (3) Afterburner parts / (4) Furnace baffles
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