MP159®
MP159 is a nickel-cobalt-based multiphase alloy. It is the high-temperature sibling of MP35N. Through a combination of cold work and age hardening, it achieves ultra-high strength (up to 265 ksi) and maintains its mechanical properties at temperatures up to 1100°F (593°C).
- Formas comuns: Round Bar, Rod, Wire, Fastener Stock.
- Caraterística principal: High strength at elevated temperatures (up to 1100°F).
- Corrosion: Excellent crevice corrosion and stress cracking resistance.
- Processing: Work strengthened + Age hardened (Precipitation).
Designers choose MP159 when they need the incredible tensile strength of MP35N but the application involves heat (such as jet engine actuators) where MP35N would soften. MP159 bridges the gap between ultra-high strength fasteners and high-temperature superalloys like Waspaloy.
Elevated Temp Strength
Maintains ultra-high tensile strength and ductility in the 1100°F range, ideal for hot-section aerospace components.
Corrosion Resistance
Immune to crevice corrosion in seawater and resistant to mineral acids, making it durable in harsh marine/aerospace environments.
High Fatigue Life
Exceptional fatigue resistance forged by the "Multiphase" strengthening mechanism (Cold Work + Phase Transformation + Aging).
| Elemento | Conteúdo (%) |
|---|---|
| Cobalto (Co) | 34.0 - 37.0 |
| Níquel (Ni) | 24.5 - 26.5 |
| Crómio (Cr) | 18.0 - 20.0 |
| Ferro (Fe) | 8.0 - 10.0 |
| Molibdénio (Mo) | 6.0 - 8.0 |
| Titânio (Ti) | 2.5 - 3.2 |
| Alumínio (Al) | 0.10 - 0.30 |
*Note: The addition of Titanium and Aluminum (compared to MP35N) provides the gamma-prime phase for high-temp stability.
| Forma do produto | Standards (AMS) |
|---|---|
| Bar (Solution Heat Treated) | AMS 5841 |
| Bar (Sol. Treated + Cold Drawn) | AMS 5842 |
| Bar (Sol + Cold Drawn + Aged) | AMS 5843 |
| Imóveis | Valores típicos (temperatura ambiente) |
|---|---|
| Resistência à tração | 260 - 275 ksi (1790 - 1900 MPa) |
| Resistência ao escoamento (0.2% Offset) | 250 - 265 ksi (1724 - 1827 MPa) |
| Alongamento | 8 - 12 % |
| Reduction of Area | 30 - 45 % |
| Shear Strength | 150 - 160 ksi |
*Note: Achieving these properties requires cold working (typically 45-50%) followed by aging at 1225°F.
Aerospace Fasteners
Critical bolts and screws in jet engines requiring strength at 1100°F where Ti-alloys or A286 would fail.
Drive Components
Actuator rods and drive shafts in aerospace control systems subjected to high stress and heat.
Gas Turbine Parts
Retaining rings and high-tension springs used in the compressor and turbine sections.
Racing Engines
High-performance fasteners for top-fuel and Formula 1 engines requiring extreme tensile strength.
Need MP159 Fastener Stock?
We maintain inventory of MP159 (AMS 5842/5843) rod and bar for immediate manufacturing. Full lot traceability provided.
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