Cobalt-Chrome Alloy MP159 vs Phynox
Cobalt-Chrome Alloy · grade comparison
Cobalt-Chrome Alloy MP159 and Phynox are both cobalt-chrome alloy grades. Both yield at about 1,830 MPa — strength does not separate them. MP159 is the more ductile: elongation 10% versus 3% for Phynox, and Phynox is harder (57 HRC vs 52 HRC). Phynox is stiffer (220 GPa vs 200 GPa) and MP159 runs hotter in service (593°C vs 400°C continuous). On the shop floor, Phynox welds better (30 vs 20 out of 100).
MP159Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
PhynoxChoose it when it will be welded.
MP159 vs Phynox: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all cobalt-chrome alloy grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all cobalt-chrome alloy grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Rockwell C
Hardness, Vickers
Same in both: Compressive Strength 1,900 MPa276 ksi
Physical
Density and transition temperatures.
Melting Point (Solidus)
Liquidus Temperature
Same in both: Density 8.3 g/cm³0.3 lb/in³
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.7 % IACS · Electrical Resistivity 1.02×10⁻⁶ Ω·m40.2 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.2 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Formability (cold)
Brazeability / Solderability
Polishability
Same in both: Machinability 10 / 100 · Machinability Rating (AISI 1212 = 100 %) 8%
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 20%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Same in both: Thermal Shock Resistance Index 9
Strength versus weight
Yield strength against density for every cobalt-chrome alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | MP159 | Phynox |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
MP159 vs Phynox — frequently asked
What is the difference between MP159 and Phynox?
Cobalt-Chrome Alloy MP159 and Phynox are both cobalt-chrome alloy grades. Both yield at about 1,830 MPa — strength does not separate them. MP159 is the more ductile: elongation 10% versus 3% for Phynox, and Phynox is harder (57 HRC vs 52 HRC).
Which is cheaper, MP159 or Phynox?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, MP159 or Phynox?
Phynox. Its weldability rates poor (30/100) against poor (20/100) for MP159.
Ready to make it?
Upload a CAD file and FabDigit prices the part in MP159 and Phynox side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.