About Alloy
MP159 is a Nickel-Cobalt based multiphase alloy. This combination of properties enables ultra high strength, toughness, good ductility and excellent corrosion resistance. Through work strengthening and aging MP159 alloy exhibits ultimate tensile strength levels in excess of 1830 MPa. MP159 is used in many different industries from use in prosthetic devices, jet engine components, fasteners, marine applications to petroleum industry applications.
Product Form
AMS 5841 Bar (Solution Heat Treated)
Solution Heat Treat: 1900°F - 1925°F / 4-8 hours + Water Quench
AMS 5842 Bar (Solution Heat Treated and Work Strengthened)
Solution Heat Treat: 1900°F - 1925°F / 4-8 hours + Water Quench
Followed by work strengthened / strain hardening
AMS 5843 Bar (Solution Heat Treated, Work Strengthened and Aged)
Solution Heat Treat: 1900°F - 1925°F / 4-8 hours + Water Quench
Followed by work strengthened / strain hardening
Followed by ageing: 1200-1250°F 4-4.5 hours + Air Cool.
Chemical Composition
| Element | Content (%) |
| Cobalt, Co | 35.7 |
| Nickel, Ni | 25.5 |
| Chromium, Cr | 19 |
| Iron, Fe | 9 |
| Molybdenum, Mo | 7 |
| Titanium, Ti | 3 |
| Niobium, Nb | 0.6 |
| Aluminum, Al | 0.2 |
Property
| Condition | Tensile Strength ksi | Yield Strength ksi | Elongation % | Reduction of Area % | Hardness HRC |
| Annealed | 123 | 58 | 60 | 69 | |
| AMS 5841 | 160 max | 70 max | 50 | 65 | 20 HRC max |
| Annealed, Cold Worked 48% | 230 | 205 | 12 | 46 | |
| AMS 5842 | - | - | - | - | ≥38HRC |
| Annealed, Cold Worked + Aged | 275 | 265 | 8 | 35 | |
| AMS 5843 | 260 min | 250 min | 6 min | 20 min | ≥44HRC |
Application
● Landing gears and bolt material
● Solid rocket boosters
● Jet engines
● Chemical processing
● Pulp and paper
● Power generation equipment
● Marine equipment
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