Cobalt-Chrome Alloy F1537 Alloy 3-ANN vs F1537 Alloy 3-HW
Cobalt-Chrome Alloy · F1537 Alloy 3 temper comparison
F1537 Alloy 3-ANN and F1537 Alloy 3-HW are two conditions of the same cobalt-chrome alloy grade, F1537 Alloy 3: ANN (annealed) versus HW (hot Worked). The chemistry is identical, so every difference below comes from the condition. F1537 Alloy 3-HW is the stronger of the two: yield strength 930 MPa (135 ksi) against 600 MPa (87 ksi) for F1537 Alloy 3-ANN, about 55% more; tensile strength follows at 1,280 MPa (186 ksi) vs 1,000 MPa (145 ksi). In exchange, F1537 Alloy 3-ANN is the more ductile: elongation 32% versus 20% for F1537 Alloy 3-HW, and F1537 Alloy 3-HW is harder (340 HB vs 275 HB). F1537 Alloy 3-ANN runs hotter in service (600°C vs 500°C continuous).
F1537 Alloy 3-ANNChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
F1537 Alloy 3-HWChoose it when strength drives the design.
F1537 Alloy 3-ANN vs F1537 Alloy 3-HW: 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.
F1537 Alloy 3-ANNF1537 Alloy 3-HW
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
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
Same in both: Elastic (Young's) Modulus 230 GPa33.4 Msi · Shear Modulus 89 GPa12.9 Msi · Bulk Modulus 185 GPa26.8 Msi · Poisson's Ratio 0.29
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.
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).
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 V · Corrosion Resistance 90 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Brazeability / Solderability 40 / 100 · Polishability 92 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 170 MJ/kg73,087 BTU/lb · Embodied Carbon (primary production) 12 kg CO₂/kg · Embodied Water 350 L/kg41.9 gal/lb · Typical Recycled Content 20%
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.
F1537 Alloy 3-ANN vs F1537 Alloy 3-HW — frequently asked
Is F1537 Alloy 3-HW stronger than F1537 Alloy 3-ANN?
Yes. F1537 Alloy 3-HW has a typical yield strength of 930 MPa (135 ksi) against 600 MPa (87 ksi) for F1537 Alloy 3-ANN — about 55% more. Tensile strength is 1,280 MPa (186 ksi) vs 1,000 MPa (145 ksi).
Which condition does FabDigit quote by default, ANN or HW?
HW is the default F1537 Alloy 3 condition in the FabDigit quote flow. The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which welds better, F1537 Alloy 3-ANN or F1537 Alloy 3-HW?
F1537 Alloy 3-ANN. Its weldability rates fair (35/100) against poor (30/100) for F1537 Alloy 3-HW.
Ready to make it?
Upload a CAD file and FabDigit prices the part in F1537 Alloy 3-ANN and F1537 Alloy 3-HW 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.