Tungsten Alloy WC-10Co vs WC-12Co
Tungsten Alloy · grade comparison
Tungsten Alloy WC-10Co and WC-12Co are both tungsten alloy grades. WC-12Co is the stronger of the two: tensile strength 1,400 MPa (203 ksi) against 1,300 MPa (189 ksi) for WC-10Co, about 8% more. WC-10Co is harder — 1,580 HV against 1,300 HV for WC-12Co — which matters for wear surfaces and threads. WC-10Co is stiffer (580 GPa vs 550 GPa) and WC-10Co conducts heat better (95 W/m·K vs 85 W/m·K).
WC-10CoChoose it when surface hardness matters.
WC-12CoChoose it when strength drives the design.
WC-10Co vs WC-12Co: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all tungsten 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 tungsten 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
Bulk Modulus
Tensile Strength (Ultimate)
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Rockwell C
Hardness, Vickers
Elongation at Break
Reduction in Area
Charpy V-Notch Impact (RT)
Same in both: Poisson's Ratio 0.22
Physical
Density and transition temperatures.
Density
Same in both: Melting Point (Solidus) 1,320°C2,408 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Same in both: Thermal Expansion (CTE, 20–100 °C) 5.5 µm/m·K3.1 µin/in·°F · Max Service Temperature (continuous) 500°C932 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 2×10⁻⁷ Ω·m7.87 µΩ·in
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 Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Machinability 3 / 100 · Brazeability / Solderability 75 / 100 · Polishability 90 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Thermal Diffusivity
Same in both: Thermal Shock Resistance Index 39
Strength versus weight
Yield strength against density for every tungsten alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | WC-10Co | WC-12Co |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$$ Specialty | $$$$$ Specialty |
| Min. machined wall | — | — |
| Best machined surface | — | — |
WC-10Co vs WC-12Co — frequently asked
Is WC-12Co stronger than WC-10Co?
Yes. WC-12Co has a typical tensile strength of 1,400 MPa (203 ksi) against 1,300 MPa (189 ksi) for WC-10Co — about 8% more.
Which is cheaper, WC-10Co or WC-12Co?
Both sit in the same relative cost tier ($$$$$, specialty); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose WC-10Co over WC-12Co?
Pick WC-10Co when surface hardness matters. Pick WC-12Co when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in WC-10Co and WC-12Co 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.