Cobalt-Chrome Alloy F1537 Alloy 1 vs F1537 Alloy 3
Cobalt-Chrome Alloy · grade comparison
Cobalt-Chrome Alloy F1537 Alloy 1 and F1537 Alloy 3 are both cobalt-chrome alloy grades. F1537 Alloy 3 is the stronger of the two: yield strength 930 MPa (135 ksi) against 610 MPa (88.5 ksi) for F1537 Alloy 1, about 52% more; tensile strength follows at 1,280 MPa (186 ksi) vs 1,000 MPa (145 ksi). In exchange, F1537 Alloy 1 is the more ductile: elongation 35% versus 20% for F1537 Alloy 3, and F1537 Alloy 3 is harder (340 HB vs 285 HB). F1537 Alloy 1 runs hotter in service (600°C vs 500°C continuous). On the shop floor, F1537 Alloy 1 welds better (good vs poor).
F1537 Alloy 1Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
F1537 Alloy 3Choose it when strength drives the design.
F1537 Alloy 1 vs F1537 Alloy 3: 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.
Shear Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
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: Elastic (Young's) Modulus 230 GPa33.4 Msi · Bulk Modulus 185 GPa26.8 Msi
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.
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 · Thermal Expansion (CTE, 20–100 °C) 12.3 µm/m·K6.8 µin/in·°F · Latent Heat of Fusion 275 J/g118 BTU/lb · Min Service Temperature -196°C-321 °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) -0.25 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
Same in both: 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)
Modulus of Resilience
Thermal Shock Resistance Index
Same in both: Specific Stiffness (E / density) 27.7 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 | F1537 Alloy 1 | F1537 Alloy 3 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
F1537 Alloy 1 vs F1537 Alloy 3 — frequently asked
Is F1537 Alloy 3 stronger than F1537 Alloy 1?
Yes. F1537 Alloy 3 has a typical yield strength of 930 MPa (135 ksi) against 610 MPa (88.5 ksi) for F1537 Alloy 1 — about 52% more. Tensile strength is 1,280 MPa (186 ksi) vs 1,000 MPa (145 ksi).
Which is cheaper, F1537 Alloy 1 or F1537 Alloy 3?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, F1537 Alloy 1 or F1537 Alloy 3?
F1537 Alloy 1. Its weldability rates good (55/100) against poor (30/100) for F1537 Alloy 3.
Ready to make it?
Upload a CAD file and FabDigit prices the part in F1537 Alloy 1 and F1537 Alloy 3 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.