1. Introduce
– Developed for applications that require the ability to maintain strength and ductility after prolonged exposure
– Ni-based high temperature alloy developed for applications involving severe heating conditions
– UNS N06635
* UNS
- Abbreviation for the Unified Numbering System for metals and alloys
- Unified Numbering System for Metals and Alloys
- A representative number compatible with metals and alloys defined in several material-related codes, including ASTM, AISI, ASME, AWS, etc.
* N : Nickel and nickel alloys
* UNS N06635 : 06XXX : Chromium (including Hastelloy, Inconel, and some additional elements)
* Hastelloy
– Corrosion-resistant alloys with nickel as the main component
– Good machinability, weldability, and can be machined into various shapes
2. Property
– Thermal stability, low thermal expansion, good oxidation resistance to 1093°C
– Excellent high temperature and thermal fatigue strength
– Excellent strength, ductility
– Maintains strength and ductility after AGE heat treatment at a temperature of 427~871℃
– Excellent corrosion resistance in oxidizing and reducing environments
| Element | Impact |
|---|---|
| Ni | Provides corrosion resistance |
| Cr | Provides oxidizing and non-oxidizing acid resistance |
| Al | Provides high temperature creep properties, oxidation resistance |
| Si | Provides localized corrosion resistance |
| Mo | Provides localized corrosion resistance |
[Hastelloy S Chemical Composition (%)]
| Ni | Cr | Fe | C | Al |
|---|---|---|---|---|
| 57.72 ~ 70.89 | 14.50 ~ 17.00 | Max. 3.00 | Max. 0.02 | 0.10 ~ 0.50 |
| Cu | Si | Mn | Mo | S |
|---|---|---|---|---|
| Max. 0.35 | 0.20 ~ 0.75 | 0.30 ~ 1.00 | 14.00 ~ 16.50 | Max. 0.02 |
| Co | W | P | B | La |
|---|---|---|---|---|
| Max. 2.00 | Max. 1.00 | Max 0.02 | Max. 0.02 | 0.01 ~ 0.10 |
[Hastelloy S Mechanical Properties]
| Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) |
|---|---|---|
| 835 | 445 | 49 |
[Hastelloy S Physical Properties]
| Density (g/cm³) | Melting Range (℃) | Specific Heat (0-100℃) J/kg*℃ |
|---|---|---|
| 8.75 | 1335 ~ 1380 | 398 |
3. Standard & Specification
– Specification : UNS N06635
| Product Form | AMS | ASTM |
|---|---|---|
| Plate, Sheet, Strip | 5873 | – |
| Bar | 5711 | – |
| Wire | 5838 | – |
| Forging material | 5711 | – |
| Pipe, Tube | – | B619, B622 |
4. Available Form
– Plate, Sheet, Strip
– Billet
– Bar
– Wire
– Pipe, Tube
5. Application & Product
– Chemical, Aerospace, Marine, Power Generation
| Application | Product |
|---|---|
| Chemical | Heat exchangers, Reactors, piping, Condensers |
| Aerospace | Jet Engine Exhaust Pipes, Turbine Blades, Vanes |
| Marine | Seawater desalination plants |
| Power generation | Gas turbines, Boilers |
(1) Heat exchanger / (2) Reactor / (3) Turbine blade
(4) Vanes / (5) Seawater desalination plants / (6) Boilers
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