Cobalt-Chrome Alloy ERCoCr-B vs Tribaloy T-400
Cobalt-Chrome Alloy · grade comparison
Cobalt-Chrome Alloy ERCoCr-B and Tribaloy T-400 are both cobalt-chrome alloy grades. ERCoCr-B is the stronger of the two: tensile strength 830 MPa (120 ksi) against 690 MPa (100 ksi) for Tribaloy T-400, about 20% more. ERCoCr-B is the more ductile: elongation 1% versus 0.5% for Tribaloy T-400, and Tribaloy T-400 is harder (600 HB vs 430 HB).
ERCoCr-BChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
ERCoCr-B vs Tribaloy T-400: 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.
Bulk Modulus
Tensile Strength (Ultimate)
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: Elastic (Young's) Modulus 225 GPa32.6 Msi · Shear Modulus 88 GPa12.8 Msi · Poisson's Ratio 0.3 · Yield Strength (0.2% offset) 620 MPa89.9 ksi
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
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
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
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Brazeability / Solderability
Polishability
Same in both: Weldability 35 / 100 · Castability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 20%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Thermal Diffusivity
Same in both: Modulus of Resilience 854 kJ/m³ · Thermal Shock Resistance Index 4
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 | ERCoCr-B | Tribaloy T-400 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
ERCoCr-B vs Tribaloy T-400 — frequently asked
Is ERCoCr-B stronger than Tribaloy T-400?
Yes. ERCoCr-B has a typical tensile strength of 830 MPa (120 ksi) against 690 MPa (100 ksi) for Tribaloy T-400 — about 20% more.
Which is cheaper, ERCoCr-B or Tribaloy T-400?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose ERCoCr-B over Tribaloy T-400?
Pick ERCoCr-B 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 ERCoCr-B and Tribaloy T-400 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.