Cobalt-Chrome Alloy F75 As Cast vs F75 Stress Relieved
Cobalt-Chrome Alloy · F75 temper comparison
F75 As Cast and F75 Stress Relieved are two conditions of the same cobalt-chrome alloy grade, F75: As Cast versus Stress Relieved. The chemistry is identical, so every difference below comes from the condition. F75 Stress Relieved is the stronger of the two: yield strength 820 MPa (119 ksi) against 510 MPa (74 ksi) for F75 As Cast, about 61% more; tensile strength follows at 1,150 MPa (167 ksi) vs 720 MPa (104 ksi). F75 Stress Relieved is the more ductile: elongation 15% versus 10% for F75 As Cast, and F75 Stress Relieved is harder (37 HRC vs 30 HRC).
F75 Stress RelievedChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
F75 As Cast vs F75 Stress Relieved: 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.
F75 As CastF75 Stress Relieved
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 85 GPa12.3 Msi · Bulk Modulus 183 GPa26.5 Msi · Poisson's Ratio 0.3 · Reduction in Area 12% · Compressive Strength 1,500 MPa218 ksi · Shear Strength 500 MPa72.5 ksi · Fracture Toughness (K_IC) 50 MPa·√m45.5 ksi·√in · Hardness, Brinell 300 HB
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 1,410°C2,570 °F
Thermal
How each material carries heat and how hot it can run.
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) 13 µm/m·K7.2 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 600°C1,112 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.9 % IACS · Electrical Resistivity 9.1×10⁻⁷ Ω·m35.8 µΩ·in
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
Same in both: Machinability Rating (AISI 1212 = 100 %) 10% · Weldability 25 / 100 · Formability (cold) 10 / 100 · Castability 78 / 100 · Brazeability / Solderability 45 / 100 · Polishability 88 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 150 MJ/kg64,488 BTU/lb · Embodied Carbon (primary production) 11 kg CO₂/kg · Embodied Water 400 L/kg47.9 gal/lb · Typical Recycled Content 25%
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.
F75 As Cast vs F75 Stress Relieved — frequently asked
Is F75 Stress Relieved stronger than F75 As Cast?
Yes. F75 Stress Relieved has a typical yield strength of 820 MPa (119 ksi) against 510 MPa (74 ksi) for F75 As Cast — about 61% more. Tensile strength is 1,150 MPa (167 ksi) vs 720 MPa (104 ksi).
Which condition does FabDigit quote by default, As Cast or Stress Relieved?
As Cast is the default F75 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.
When should I choose F75 As Cast over F75 Stress Relieved?
Pick F75 Stress Relieved when strength drives the design, or when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in F75 As Cast and F75 Stress Relieved 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.