1. Introduce
– High strength Ni-based superalloys in service in commercial and military jet engines
– A precipitation hardening cast superalloy with a γ’ phase and carbides precipitated in the γ base, resulting in excellent mechanical properties at high temperatures
– Good resistance to grain boundary cracking during solidification
– PMET 842
– UNS N07042
* Rene
– Age-hardening Ni-Cr alloy with high strength, high temperature and corrosion resistance
* γ’ precipitates : A₃B type (LI₂) intermetallic compounds
– A : Electronegative elements such as Ni, Co, and Cu
– B : Electronegative elements such as Al, Ti, etc.
– Mo, Ti, Cr: Increased γ’ strength
* 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 N07042 : 07XXX : Chromium (Precipitation-hardenable alloy)
2. Property
– Excellent thermal fatigue characteristics, high temperature strength, high temperature corrosion resistance, and thermal stability
| Element | Impact |
|---|---|
| Ni | Provides excellent strength and corrosion resistance |
| Cr | Provides corrosion resistance, oxidation resistance |
| Co | Provides strength, creep properties |
| Mo | Provides high temperature creep properties |
| W | Provides high temperature creep properties |
| Ta | Creep resistance through solid solution strengthening, reduces stacking defect energy, provides heat resistance and corrosion resistance |
[Rene 142 Chemical Composition (%)]
| Ni | Cr | C | Al |
|---|---|---|---|
| 50.81 ~ 64.88 | 6.00 ~ 8.00 | 0.10 ~ 0.14 | 5.00 ~ 7.00 |
| Mo | Co | W | Ta |
|---|---|---|---|
| 1.00 ~ 2.00 | 11.00 ~ 13.00 | 4.00 ~ 6.00 | 5.00 ~ 7.00 |
| Zr | B | Re | Hf |
|---|---|---|---|
| 0.01 ~ 0.03 | 0.01 ~ 0.02 | 2.00 ~ 4.00 | 1.00 ~ 2.00 |
[Rene 142 Mechanical Properties]
| Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) |
|---|---|---|
| 1227 | 850 | 13.7 |
3. Standard & Speicification
– Specification : UNS N07042
| Product Form | GE | MSRR |
|---|---|---|
| Coil, Wire | B50TF274 | 9500/247 |
4. Available Form
– Bar, Rod
– Sheet, Plate
– Coil, Wire
– Pipe
– Powder
5. Application & Product
– Aerospace
| Application | Product |
|---|---|
| Aerospace | Turbine Blades, Turbine Wheels, Combustion Chamber Liners, Springs, Fasteners, Turbine Casings |
(1) Turbine Wheels / (2) Springs / (3) Turbine Casings / (4) Combustion Chamber Liners
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