MP159,MP159 ,UNS R30159,E FORU

British Specs:，American Specs:AMS 5841 Bar AMS 5845 Bar AMS 5843 Bar，German Specs:

### Technical Data Sheet: MP159 / UNS R30159 **Cobalt-Nickel-Chromium Superalloy with Multistage Aging** --- ### 1. Product Overview **MP159** (UNS R30159) is an advanced **cobalt-nickel-chromium superalloy** strengthened by multistage aging treatment. It offers an exceptional combination of **ultra-high strength**, excellent corrosion resistance, and good fatigue properties up to approximately **650°C (1200°F)**. The alloy is particularly valued for applications requiring high strength-to-weight ratios and reliability in demanding environments. --- ### 2. Chemical Composition (Weight %) | Element | Content (%) | Role | |---------|-------------|------| | **Cobalt (Co)** | 25.0–30.0 | Matrix element | | **Nickel (Ni)** | 25.0–30.0 | Austenitic structure | | **Chromium (Cr)** | 18.0–20.0 | Corrosion & oxidation resistance | | **Iron (Fe)** | 7.0–11.0 | Solid solution strengthening | | **Molybdenum (Mo)** | 6.0–8.0 | Solid solution & precipitation hardening | | **Titanium (Ti)** | 2.5–3.25 | Formation of γ' precipitates | | **Niobium (Nb)** | 1.0–1.7 | Carbide & intermetallic formation | | **Aluminum (Al)** | 0.1–0.5 | Precipitation strengthening | | **Carbon (C)** | ≤ 0.04 | Controlled for carbide formation | | **Manganese (Mn)** | ≤ 0.50 | Residual | | **Silicon (Si)** | ≤ 0.50 | Residual | --- ### 3. Physical Properties | Property | Value | |----------|-------| | **Density** | 8.31 g/cm³ | | **Melting Range** | 1350–1400°C | | **Thermal Conductivity** | 14.0 W/m·K at 100°C | | **Coefficient of Thermal Expansion** | 12.8 μm/m·°C (20–100°C) | | **Electrical Resistivity** | 1.12 μΩ·m | | **Magnetic Permeability** | Essentially non-magnetic | --- ### 4. Mechanical Properties **Room Temperature (Aged Condition):** - **Tensile Strength**: 1620–1790 MPa (235–260 ksi) - **Yield Strength (0.2% Offset)**: 1515–1655 MPa (220–240 ksi) - **Elongation**: 10–15% - **Reduction of Area**: 35–50% - **Hardness**: 44–48 HRC **Elevated Temperature Performance:** - **Useful Strength Range**: Up to 650°C (1200°F) - **Retains high strength** at elevated temperatures - **Good stress rupture** and creep properties --- ### 5. Product Forms & Applications **Available Forms:** - Bar, rod, and wire - Forgings and rings - Fasteners (bolts, screws, studs) - Springs and mechanical components **Typical Applications:** - **Aerospace**: Engine bolts, fasteners, landing gear components - **Defense**: Missile components, ordnance devices - **Medical**: Surgical instruments, implants - **Industrial**: High-strength fasteners, valve components --- ### 6. International Standards | Standard Type | Standard Number | |---------------|-----------------| | **UNS** | R30159 | | **AMS** | 5842 (Bar, forgings) | | **ASTM** | F562 (Wrought cobalt-nickel alloy) | | **ISO** | 5832-6 (Implants for surgery) | --- ### 7. Heat Treatment **Solution Treatment:** - 1040–1065°C (1900–1950°F) - Rapid cooling (water quench) **Aging Treatment:** - 650–760°C (1200–1400°F) – Multistage process - Specific cycles tailored to application requirements --- ### 8. Fabrication Notes **Machining:** - Use carbide tools with positive rake angles - Moderate speeds with heavy feeds - Adequate coolant required **Welding:** - Not generally recommended for fusion welding - Resistance and friction welding possible with proper techniques **Cold Working:** - Good cold formability in solution-treated condition - Requires intermediate annealing for severe deformation --- ### 9. Corrosion Resistance - **Excellent resistance** to stress corrosion cracking - **Good oxidation resistance** up to 650°C - **Resistant** to salt water and many chemical environments --- ### 10. Key Advantages - **Ultra-high strength** with good toughness - **Excellent fatigue strength** - **Good corrosion resistance** - **Maintains properties** at elevated temperatures - **Proven reliability** in critical applications --- **Note:** MP159 is a premium high-strength alloy suitable for the most demanding applications. Proper heat treatment is essential to achieve optimal properties. Consult with our technical team for specific application recommendations and processing guidance.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 2261 gallon liquid totes Special package is available on request.