Cobalt-Chrome Alloy F75 vs G-CoCr28
Cobalt-Chrome Alloy · grade comparison
Cobalt-Chrome Alloy F75 and G-CoCr28 are both cobalt-chrome alloy grades. Both yield at about 510 MPa — strength does not separate them. F75 is the more ductile: elongation 10% versus 9% for G-CoCr28, and G-CoCr28 is harder (320 HB vs 300 HB). On the shop floor, F75 sits in a lower cost tier (premium, $$$) than G-CoCr28 (high, $$$$).
F75Choose it when the part is bent, formed or impact-loaded, or when cost is the deciding factor.
F75 vs G-CoCr28: 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.
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 220 GPa31.9 Msi · Shear Modulus 85 GPa12.3 Msi · Bulk Modulus 183 GPa26.5 Msi · Poisson's Ratio 0.3 · Tensile Strength (Ultimate) 720 MPa104 ksi · Shear Strength 500 MPa72.5 ksi · Fatigue Strength (Endurance Limit) 250 MPa36.3 ksi · Hardness, Rockwell C 30 HRC
Physical
Density and transition temperatures.
Liquidus Temperature
Same in both: Density 8.3 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,330°C2,426 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Min Service Temperature
Same in both: Thermal Conductivity 14 W/m·K8.1 BTU/hr·ft·°F · Specific Heat Capacity 450 J/kg·K0.11 BTU/lb·°F · Max Service Temperature (continuous) 600°C1,112 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.3 V
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 Water
Typical Recycled Content
Same in both: Embodied Carbon (primary production) 11 kg CO₂/kg
Common Calculations
Ratios derived from the values above.
Modulus of Resilience
Thermal Shock Resistance Index
Same in both: Specific Strength (UTS / density) 87 kN·m/kg · Specific Stiffness (E / density) 26.5 MN·m/kg · Thermal Diffusivity 3.7 mm²/s
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 | G-CoCr28 |
|---|---|---|
| CNC machining | Yes | — |
| 3D printing | Yes | — |
| Default condition | As Cast | — |
| Relative cost | $$$ Premium | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
| Electropolishing | Yes | — |
| Passivation (Stainless Steel) | Yes | — |
F75 vs G-CoCr28 — frequently asked
What is the difference between F75 and G-CoCr28?
Cobalt-Chrome Alloy F75 and G-CoCr28 are both cobalt-chrome alloy grades. Both yield at about 510 MPa — strength does not separate them. F75 is the more ductile: elongation 10% versus 9% for G-CoCr28, and G-CoCr28 is harder (320 HB vs 300 HB).
Which is cheaper, F75 or G-CoCr28?
F75 is the lower-cost material: it sits in the premium tier ($$$) while G-CoCr28 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 G-CoCr28?
G-CoCr28. Its weldability rates poor (30/100) against poor (25/100) for F75.
Ready to make it?
Upload a CAD file and FabDigit prices the part in F75 and G-CoCr28 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.