Cobalt-Chrome Alloy Stellite 20 vs Tribaloy T-800
Cobalt-Chrome Alloy · grade comparison
Cobalt-Chrome Alloy Stellite 20 and Tribaloy T-800 are both cobalt-chrome alloy grades. Tribaloy T-800 is the stronger of the two: yield strength 480 MPa (69.6 ksi) against 450 MPa (65.3 ksi) for Stellite 20, about 7% more. In exchange, Stellite 20 is the more ductile: elongation 0.5% versus 0.3% for Tribaloy T-800, and Tribaloy T-800 is harder (58 HRC vs 55 HRC). Tribaloy T-800 is lighter (8.6 g/cm³ vs 8.98 g/cm³ for Stellite 20) and Stellite 20 is stiffer (250 GPa vs 225 GPa).
Stellite 20Choose it when the part is bent, formed or impact-loaded.
Tribaloy T-800Choose it when strength drives the design, or when weight is the constraint.
Stellite 20 vs Tribaloy T-800: 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
Shear 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)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Bulk Modulus
Same in both: Poisson's Ratio 0.29 · Charpy V-Notch Impact (RT) 2 J1.5 ft·lbf
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 420 J/kg·K0.1 BTU/lb·°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).
Corrosion Resistance
Galvanic Potential (seawater, vs SCE)
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Polishability
Same in both: Machinability 4 / 100 · Machinability Rating (AISI 1212 = 100 %) 3% · Formability (cold) 2 / 100 · Castability 60 / 100 · Brazeability / Solderability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Typical Recycled Content
Embodied Water
Same in both: Embodied Carbon (primary production) 16 kg CO₂/kg
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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 | Stellite 20 | Tribaloy T-800 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Stellite 20 vs Tribaloy T-800 — frequently asked
Is Tribaloy T-800 stronger than Stellite 20?
Yes. Tribaloy T-800 has a typical yield strength of 480 MPa (69.6 ksi) against 450 MPa (65.3 ksi) for Stellite 20 — about 7% more. Tensile strength is 500 MPa (72.5 ksi) vs 480 MPa (69.6 ksi).
Which is cheaper, Stellite 20 or Tribaloy T-800?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, Stellite 20 or Tribaloy T-800?
Stellite 20. Its weldability rates poor (25/100) against poor (20/100) for Tribaloy T-800.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Stellite 20 and Tribaloy T-800 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.