Cobalt MP159 alloy - ultra-high strength 265,000 psi with excellent ductility. ZYTC Alloy supplies AMS 5841/5842f/5843 certified bars for aerospace & medical applications. Request a quote today.
Delivery :
FOB
minimum order :
50 kilograms
Supply Ability :
5000kilograms / Month
Stock Time :
7-10Day
Country of Origin :
CHINA
Quantity :
add to cart
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MP159 is a multiphase cobalt-nickel-chromium-molybdenum superalloy strengthened by cold working and aging to achieve ultimate tensile strengths exceeding 1830 MPa (265 ksi). It combines ultra-high strength with exceptional ductility, outstanding corrosion resistance, and good fatigue properties. This alloy is specifically developed for aerospace fasteners, jet engine components, and medical devices requiring the highest strength in a cobalt-base alloy .
1. Product Specifications & Physical Data
ZYTC Alloy supplies UNS R30159 in mill forms for aerospace, medical, and oil & gas applications requiring verified ultra-high-strength properties and complete material traceability.
Available Forms: Bar (AMS 5841, AMS 5842F, AMS 5843), wire, rod, and forgings .
Specifications: AMS 5841, AMS 5842F, AMS 5843, UNS R30159 .
Chemical Composition (Weight %)
MP159 Specification
Cobalt (Co)
35.7 (Balance approx.)
Nickel (Ni)
25.5
Chromium (Cr)
19.0
Iron (Fe)
9.0
Molybdenum (Mo)
7.0
Titanium (Ti)
3.0
Niobium (Nb)
0.6
Aluminum (Al)
0.2
Physical Properties
Metric
Imperial
Density
8.33 - 9.27 g/cm³
0.301 lb/in³
Melting Point
1350 - 1440°C
2460 - 2625°F
Modulus of Elasticity
208 GPa
30,200 ksi
Shear Modulus
75.8 GPa
11,000 ksi
Coefficient of Expansion (25-100°C)
14.3 µm/m·°C
7.94 µin/in·°F
Mechanical Properties
Condition
Metric
Imperial
Tensile Strength
Annealed (1052°C)
848 MPa
123 ksi
Yield Strength (0.2%)
Annealed
400 MPa
58 ksi
Elongation
Annealed
12%
12%
Tensile Strength
Cold Worked 48% + Aged
≥ 1830 MPa
≥ 265 ksi
Yield Strength (0.2%)
CW 48% + Aged
≥ 1720 MPa
≥ 250 ksi
Elongation
CW 48% + Aged
8-12%
8-12%
Reduction of Area
CW 48% + Aged
40-50%
40-50%
2. Fabrication & Material Comparison
MP159 requires precise processing to achieve its unique combination of ultra-high strength and ductility.
Annealing: 1177°C (2150°F), rapid air cool; produces soft condition for forming .
Cold Working: Ductile in annealed condition; 45-50% cold reduction required for optimal age-hardening response .
Aging: 663°C (1225°F) × 4 hours, air cool; performed after final cold working .
Machining: Difficult due to high strength and work-hardening rate; requires rigid setups, slow speeds, high feed rates, and ample coolant .
Welding: Limited; components typically mechanically fastened rather than welded .
Material Comparison:
vs. MP35N: Higher strength achievable through optimized cold work + aging; similar corrosion resistance .
vs. Inconel 718: Higher strength (265 ksi vs. 200 ksi); superior ductility at equivalent strength .
vs. 17-7PH: Significantly higher strength; better corrosion resistance; more expensive .
vs. Ti-6Al-4V: Higher strength; higher modulus; different biocompatibility profile .
Industrial: Power generation equipment, high-strength fasteners
Contact ZYTC Alloy for certified MP159 materials with complete traceability, AMS specifications, technical datasheets, and competitive pricing on standard sizes or custom-forged components.
