Cobalt-Chrome Alloy Elgiloy vs F75
Cobalt-Chrome Alloy · grade comparison
Cobalt-Chrome Alloy Elgiloy and F75 are both cobalt-chrome alloy grades. Elgiloy is the stronger of the two: yield strength 2,000 MPa (290 ksi) against 510 MPa (74 ksi) for F75, about 3.9 times as much; tensile strength follows at 2,200 MPa (319 ksi) vs 720 MPa (104 ksi). In exchange, F75 is the more ductile: elongation 10% versus 3% for Elgiloy, and Elgiloy is harder (58 HRC vs 30 HRC). F75 runs hotter in service (600°C vs 400°C continuous) and F75 conducts heat better (14 W/m·K vs 12.5 W/m·K). On the shop floor, F75 sits in a lower cost tier (premium, $$$) than Elgiloy (high, $$$$).
ElgiloyChoose it when strength drives the design.
F75Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Elgiloy vs F75: 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)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Rockwell C
Hardness, Vickers
Compressive Strength
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Same in both: Poisson's Ratio 0.3
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 Rating (AISI 1212 = 100 %)
Castability
Brazeability / Solderability
Polishability
Same in both: Machinability 12 / 100 · Weldability 25 / 100 · Formability (cold) 10 / 100
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 | Elgiloy | F75 |
|---|---|---|
| CNC machining | — | Yes |
| 3D printing | — | Yes |
| Default condition | — | As Cast |
| Relative cost | $$$$ High | $$$ Premium |
| Min. machined wall | — | — |
| Best machined surface | — | — |
| Electropolishing | — | Yes |
| Passivation (Stainless Steel) | — | Yes |
Elgiloy vs F75 — frequently asked
Is Elgiloy stronger than F75?
Yes. Elgiloy has a typical yield strength of 2,000 MPa (290 ksi) against 510 MPa (74 ksi) for F75 — about 3.9 times as much. Tensile strength is 2,200 MPa (319 ksi) vs 720 MPa (104 ksi).
Which is cheaper, Elgiloy or F75?
F75 is the lower-cost material: it sits in the premium tier ($$$) while Elgiloy is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
When should I choose Elgiloy over F75?
Pick Elgiloy when strength drives the design. Pick F75 when the part is bent, formed or impact-loaded, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Elgiloy and F75 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.