Cobalt-Chrome Alloy Vicalloy Annealed vs Vicalloy V-I
Cobalt-Chrome Alloy · Vicalloy temper comparison
Vicalloy Annealed and Vicalloy V-I are two conditions of the same cobalt-chrome alloy grade, Vicalloy: Annealed versus V-I (vicalloy I). The chemistry is identical, so every difference below comes from the condition. Vicalloy V-I is the stronger of the two: yield strength 1,100 MPa (160 ksi) against 400 MPa (58 ksi) for Vicalloy Annealed, about 175% more; tensile strength follows at 1,350 MPa (196 ksi) vs 700 MPa (102 ksi). In exchange, Vicalloy Annealed is the more ductile: elongation 22% versus 3% for Vicalloy V-I, and Vicalloy V-I is harder (435 HB vs 235 HB). Vicalloy Annealed runs hotter in service (500°C vs 400°C continuous). On the shop floor, Vicalloy Annealed machines more easily (fair vs poor) and Vicalloy Annealed welds better (fair vs poor).
Vicalloy AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Vicalloy V-IChoose it when strength drives the design.
Vicalloy Annealed vs Vicalloy V-I: 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
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: Shear Modulus 74 GPa10.7 Msi · Bulk Modulus 165 GPa23.9 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 8.25 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,440°C2,624 °F · Liquidus Temperature 1,470°C2,678 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 23 W/m·K13.3 BTU/hr·ft·°F · Specific Heat Capacity 420 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.5 µm/m·K5.8 µin/in·°F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.4 V · Corrosion Resistance 25 / 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: Castability 50 / 100 · Brazeability / Solderability 40 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 95 MJ/kg40,843 BTU/lb · Embodied Carbon (primary production) 6 kg CO₂/kg · Typical Recycled Content 15%
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.
Vicalloy Annealed vs Vicalloy V-I — frequently asked
Is Vicalloy V-I stronger than Vicalloy Annealed?
Yes. Vicalloy V-I has a typical yield strength of 1,100 MPa (160 ksi) against 400 MPa (58 ksi) for Vicalloy Annealed — about 175% more. Tensile strength is 1,350 MPa (196 ksi) vs 700 MPa (102 ksi).
Which condition does FabDigit quote by default, Annealed or V-I?
CW+Age is the default Vicalloy condition in the FabDigit quote flow (neither Annealed nor V-I). 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 is easier to machine, Vicalloy Annealed or Vicalloy V-I?
Vicalloy Annealed. Its machinability rates fair (40/100) against poor (25/100) for Vicalloy V-I; for welding the order is Vicalloy Annealed first (fair, 35/100) then Vicalloy V-I (poor, 22/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Vicalloy Annealed and Vicalloy V-I 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.