Cobalt-Chrome Alloy F1537 Alloy 3 vs G-CoCr28
Cobalt-Chrome Alloy · grade comparison
Cobalt-Chrome Alloy F1537 Alloy 3 and G-CoCr28 are both cobalt-chrome alloy grades. F1537 Alloy 3 is the stronger of the two: yield strength 930 MPa (135 ksi) against 500 MPa (72.5 ksi) for G-CoCr28, about 86% 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 9% for G-CoCr28, and F1537 Alloy 3 is harder (340 HB vs 320 HB). G-CoCr28 runs hotter in service (600°C vs 500°C continuous).
F1537 Alloy 3Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
G-CoCr28Choose it when the part sees heat.
F1537 Alloy 3 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.
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
Charpy V-Notch Impact (RT)
Physical
Density and transition temperatures.
Same in both: Density 8.3 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,330°C2,426 °F · Liquidus Temperature 1,400°C2,552 °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)
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
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2 % IACS · Electrical Resistivity 8.8×10⁻⁷ Ω·m34.6 µΩ·in
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 %)
Formability (cold)
Castability
Same in both: Weldability 30 / 100 · Brazeability / Solderability 40 / 100 · Polishability 92 / 100
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 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 | G-CoCr28 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
F1537 Alloy 3 vs G-CoCr28 — frequently asked
Is F1537 Alloy 3 stronger than G-CoCr28?
Yes. F1537 Alloy 3 has a typical yield strength of 930 MPa (135 ksi) against 500 MPa (72.5 ksi) for G-CoCr28 — about 86% more. Tensile strength is 1,280 MPa (186 ksi) vs 720 MPa (104 ksi).
Which is cheaper, F1537 Alloy 3 or G-CoCr28?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose F1537 Alloy 3 over G-CoCr28?
Pick F1537 Alloy 3 when strength drives the design, or when the part is bent, formed or impact-loaded. Pick G-CoCr28 when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in F1537 Alloy 3 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.