Cobalt-Chrome Alloy F75 vs MP159
Cobalt-Chrome Alloy · grade comparison
Cobalt-Chrome Alloy F75 and MP159 are both cobalt-chrome alloy grades. MP159 is the stronger of the two: yield strength 1,830 MPa (265 ksi) against 510 MPa (74 ksi) for F75, about 3.6 times as much; tensile strength follows at 1,965 MPa (285 ksi) vs 720 MPa (104 ksi). MP159 is harder — 52 HRC against 30 HRC for F75 — which matters for wear surfaces and threads. F75 is stiffer (220 GPa vs 200 GPa) and F75 conducts heat better (14 W/m·K vs 11.5 W/m·K). On the shop floor, F75 sits in a lower cost tier (premium, $$$) than MP159 (high, $$$$).
F75Choose it when cost is the deciding factor.
MP159Choose it when strength drives the design, or when surface hardness matters.
F75 vs MP159: 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Poisson's Ratio 0.3 · Elongation at Break 10%
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)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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 | F75 | MP159 |
|---|---|---|
| CNC machining | Yes | — |
| 3D printing | Yes | — |
| Default condition | As Cast | — |
| Relative cost | $$$ Premium | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
| Electropolishing | Yes | — |
| Passivation (Stainless Steel) | Yes | — |
F75 vs MP159 — frequently asked
Is MP159 stronger than F75?
Yes. MP159 has a typical yield strength of 1,830 MPa (265 ksi) against 510 MPa (74 ksi) for F75 — about 3.6 times as much. Tensile strength is 1,965 MPa (285 ksi) vs 720 MPa (104 ksi).
Which is cheaper, F75 or MP159?
F75 is the lower-cost material: it sits in the premium tier ($$$) while MP159 is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which welds better, F75 or MP159?
F75. Its weldability rates poor (25/100) against poor (20/100) for MP159.
Ready to make it?
Upload a CAD file and FabDigit prices the part in F75 and MP159 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.