Cobalt-Chrome Alloy G-CoCr28-F vs G-CoCr28-HIP
Cobalt-Chrome Alloy · G-CoCr28 temper comparison
G-CoCr28-F and G-CoCr28-HIP are two conditions of the same cobalt-chrome alloy grade, G-CoCr28: F (as fabricated) versus HIP (hot isostatic pressed). The chemistry is identical, so every difference below comes from the condition. G-CoCr28-HIP is the stronger of the two: yield strength 560 MPa (81.2 ksi) against 500 MPa (72.5 ksi) for G-CoCr28-F, about 12% more; tensile strength follows at 900 MPa (131 ksi) vs 720 MPa (104 ksi). G-CoCr28-HIP is the more ductile: elongation 18% versus 9% for G-CoCr28-F, and G-CoCr28-HIP is harder (32 HRC vs 30 HRC).
G-CoCr28-HIPChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
G-CoCr28-F vs G-CoCr28-HIP: 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
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: Shear Modulus 85 GPa12.3 Msi · Bulk Modulus 183 GPa26.5 Msi · Poisson's Ratio 0.3
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.
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) 13.5 µm/m·K7.5 µin/in·°F · Latent Heat of Fusion 280 J/g120 BTU/lb · Max Service Temperature (continuous) 600°C1,112 °F · Min Service Temperature -200°C-328 °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).
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
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 70 / 100 · Brazeability / Solderability 40 / 100 · Polishability 92 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 145 MJ/kg62,339 BTU/lb · Embodied Carbon (primary production) 11 kg CO₂/kg · Embodied Water 500 L/kg59.9 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.
G-CoCr28-F vs G-CoCr28-HIP — frequently asked
Is G-CoCr28-HIP stronger than G-CoCr28-F?
Yes. G-CoCr28-HIP has a typical yield strength of 560 MPa (81.2 ksi) against 500 MPa (72.5 ksi) for G-CoCr28-F — about 12% more. Tensile strength is 900 MPa (131 ksi) vs 720 MPa (104 ksi).
Which condition does FabDigit quote by default, F or HIP?
F is the default G-CoCr28 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, G-CoCr28-F or G-CoCr28-HIP?
G-CoCr28-HIP. Its weldability rates fair (35/100) against poor (30/100) for G-CoCr28-F.
Ready to make it?
Upload a CAD file and FabDigit prices the part in G-CoCr28-F and G-CoCr28-HIP 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.