1. Introduce
– HS : Abbreviation for Haynes Stellite
– Cobalt-based high-temperature superalloy with high tensile and creep properties
– Better stress-rupture properties at 926℃ and 980℃ than other alloys
– Excellent oxidation and reduction resistance up to 1150°C
– UNS R30031
* Stellite Alloys
- A Co-Cr alloy designed for wear resistance
- Alloys with Cr, C, W, Mo, etc. added to a Co base
- Excellent corrosion, erosion, and wear resistance
→ Cause : Intrinsic properties of hard carbide phase dispersed in the CoCr alloy base
* 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.
* R : Reactive and Refractory Metals and Alloys
* UNS R30031 : 3XXXX : Cobalt
2. Property
– High temperature strength, corrosion resistance, abrasion resistance, good weldability
| Element | Impact |
|---|---|
| Co | Provides high temperature creep strength, abrasion resistance |
| Cr | Provides corrosion resistance, strength |
| W | Provides high temperature hardness, abrasion resistance |
[HS 31(X-40) Chemical Composition (%)]
| Co | Cr | Ni | Fe |
|---|---|---|---|
| Min. 52.50 | Max. 25.50 | Max. 10.50 | Max. 2.00 |
| C | Si | Mn | W |
|---|---|---|---|
| Max. 0.50 | Max. 0.75 | Max. 0.75 | Max. 7.50 |
[HS 31(X-40) Mechanical Properties]
| Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) |
|---|---|---|
| 1158 | 1034 | 15 |
[HS 31(X-40) Physical Properties]
| Density (g/㎤) | Melting Range (℃) | Specific Heat (0-100℃), J/kg*℃ |
|---|---|---|
| 8.03 | 1370 ~ 1400 | 450 ~ 460 |
3. Standard & Specification
– UNS R30031
| Product Form | SAE | ASTM |
|---|---|---|
| Castings | AMS 5382 | A732 |
4. Available Form
– Plate, Sheet
– Bar, Rod
– Coil, Strip
– Pipe, Tube
5. Application & Product
– Medical, Aerospace
| Application | Product |
|---|---|
| Medical | Hip prosthesis parts, Knee prosthesis parts, Dental prosthesis |
| Aerospace | Gas turbine blades, Vanes, Gas turbines, Turbochargers, Bearings |
(1) Hip prosthesis parts / (2) Knee prosthesis parts / (3) Bearing
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