Refractory Metal C-103 vs Cb-752
Refractory Metal · grade comparison
Refractory Metal C-103 and Cb-752 are both refractory metal grades. Cb-752 is the stronger of the two: yield strength 310 MPa (45 ksi) against 275 MPa (39.9 ksi) for C-103, about 13% more; tensile strength follows at 450 MPa (65.3 ksi) vs 415 MPa (60.2 ksi). Cb-752 is stiffer (110 GPa vs 88 GPa) and Cb-752 conducts electricity better (7.2 % IACS vs 5.1 % IACS). On the shop floor, C-103 welds better (80 vs 70 out of 100), C-103 forms better (excellent vs very good), and Cb-752 sits in a lower cost tier (high, $$$$) than C-103 (specialty, $$$$$).
C-103Choose it when it will be welded.
Cb-752Choose it when strength drives the design, or when cost is the deciding factor.
C-103 vs Cb-752: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all refractory metal 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 refractory metal 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
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Rockwell B
Compressive Strength
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Same in both: Elongation at Break 25% · Reduction in Area 55% · Hardness, Vickers 180 HV
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)
Min Service Temperature
Same in both: Latent Heat of Fusion 285 J/g123 BTU/lb · Max Service Temperature (continuous) 1,400°C2,552 °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.
Weldability
Formability (cold)
Castability
Same in both: Machinability 30 / 100 · Machinability Rating (AISI 1212 = 100 %) 25% · Brazeability / Solderability 60 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Same in both: Typical Recycled Content 25%
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 refractory metal grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | C-103 | Cb-752 |
|---|---|---|
| Default condition | Vacuum Annealed | — |
| Relative cost | $$$$$ Specialty | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
C-103 vs Cb-752 — frequently asked
Is Cb-752 stronger than C-103?
Yes. Cb-752 has a typical yield strength of 310 MPa (45 ksi) against 275 MPa (39.9 ksi) for C-103 — about 13% more. Tensile strength is 450 MPa (65.3 ksi) vs 415 MPa (60.2 ksi).
Which is cheaper, C-103 or Cb-752?
Cb-752 is the lower-cost material: it sits in the high tier ($$$$) while C-103 is specialty ($$$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which welds better, C-103 or Cb-752?
C-103. Its weldability rates very good (80/100) against very good (70/100) for Cb-752.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C-103 and Cb-752 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.