Cobalt-Chrome Alloy F1537 Alloy 3 vs F75
Cobalt-Chrome Alloy · grade comparison
Cobalt-Chrome Alloy F1537 Alloy 3 and F75 are both cobalt-chrome alloy grades. F1537 Alloy 3 is the stronger of the two: yield strength 930 MPa (135 ksi) against 510 MPa (74 ksi) for F75, about 82% more; tensile strength follows at 1,280 MPa (186 ksi) vs 720 MPa (104 ksi). F1537 Alloy 3 is the more ductile: elongation 20% versus 10% for F75, and F1537 Alloy 3 is harder (340 HB vs 300 HB). F75 runs hotter in service (600°C vs 500°C continuous). On the shop floor, F75 sits in a lower cost tier (premium, $$$) than F1537 Alloy 3 (high, $$$$).
F1537 Alloy 3Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
F75Choose it when the part sees heat, or when cost is the deciding factor.
F1537 Alloy 3 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
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, Brinell
Hardness, Rockwell C
Hardness, Vickers
Compressive Strength
Charpy V-Notch Impact (RT)
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
Max Service Temperature (continuous)
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 · Min Service Temperature -196°C-321 °F
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.
Weldability
Formability (cold)
Brazeability / Solderability
Polishability
Castability
Same in both: Machinability 12 / 100 · Machinability Rating (AISI 1212 = 100 %) 10%
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 Shock Resistance Index
Same in both: 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 | F1537 Alloy 3 | 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 |
F1537 Alloy 3 vs F75 — frequently asked
Is F1537 Alloy 3 stronger than F75?
Yes. F1537 Alloy 3 has a typical yield strength of 930 MPa (135 ksi) against 510 MPa (74 ksi) for F75 — about 82% more. Tensile strength is 1,280 MPa (186 ksi) vs 720 MPa (104 ksi).
Which is cheaper, F1537 Alloy 3 or F75?
F75 is the lower-cost material: it sits in the premium tier ($$$) while F1537 Alloy 3 is high ($$$$). 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, F1537 Alloy 3 or F75?
F1537 Alloy 3. 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 F1537 Alloy 3 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.