Cobalt-Chrome Alloy Tribaloy T-400 vs Tribaloy T-800
Cobalt-Chrome Alloy · grade comparison
Cobalt-Chrome Alloy Tribaloy T-400 and Tribaloy T-800 are both cobalt-chrome alloy grades. Tribaloy T-400 is the stronger of the two: yield strength 620 MPa (89.9 ksi) against 480 MPa (69.6 ksi) for Tribaloy T-800, about 29% more; tensile strength follows at 690 MPa (100 ksi) vs 500 MPa (72.5 ksi). Tribaloy T-400 is the more ductile: elongation 0.5% versus 0.3% for Tribaloy T-800, and Tribaloy T-800 is harder (680 HV vs 640 HV). Tribaloy T-400 conducts heat better (14 W/m·K vs 12 W/m·K). On the shop floor, Tribaloy T-400 welds better (fair vs poor).
Tribaloy T-400Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
Tribaloy T-400 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.
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 225 GPa32.6 Msi · Compressive Strength 1,900 MPa276 ksi · Fracture Toughness (K_IC) 14 MPa·√m12.7 ksi·√in
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
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 420 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12 µm/m·K6.7 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).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Same in both: Machinability Rating (AISI 1212 = 100 %) 3% · Formability (cold) 2 / 100 · Castability 60 / 100 · Brazeability / Solderability 45 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Typical Recycled Content
Same in both: Embodied Carbon (primary production) 16 kg CO₂/kg · Embodied Water 400 L/kg47.9 gal/lb
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 | Tribaloy T-400 | Tribaloy T-800 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Tribaloy T-400 vs Tribaloy T-800 — frequently asked
Is Tribaloy T-400 stronger than Tribaloy T-800?
Yes. Tribaloy T-400 has a typical yield strength of 620 MPa (89.9 ksi) against 480 MPa (69.6 ksi) for Tribaloy T-800 — about 29% more. Tensile strength is 690 MPa (100 ksi) vs 500 MPa (72.5 ksi).
Which is cheaper, Tribaloy T-400 or Tribaloy T-800?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, Tribaloy T-400 or Tribaloy T-800?
Tribaloy T-400. Its weldability rates fair (35/100) against poor (20/100) for Tribaloy T-800.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Tribaloy T-400 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.