Refractory Metal Cb-752 vs NbTi
Refractory Metal · grade comparison
Refractory Metal Cb-752 and NbTi are both refractory metal grades. NbTi is the stronger of the two: yield strength 350 MPa (50.8 ksi) against 310 MPa (45 ksi) for Cb-752, about 13% more; tensile strength follows at 620 MPa (89.9 ksi) vs 450 MPa (65.3 ksi). Cb-752 is harder — 170 HB against 160 HB for NbTi — which matters for wear surfaces and threads. NbTi is lighter (6.05 g/cm³ vs 9.03 g/cm³ for Cb-752) and Cb-752 is stiffer (110 GPa vs 65 GPa). On the shop floor, Cb-752 machines more easily (30 vs 20 out of 100), Cb-752 welds better (very good vs fair), and NbTi forms better (excellent vs very good).
Cb-752Choose it when surface hardness matters, or when the part sees heat.
NbTiChoose it when strength drives the design, or when weight is the constraint.
Cb-752 vs NbTi: 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)
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
Same in both: Elongation at Break 25% · Hardness, Rockwell B 88 HRB
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)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
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.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Brazeability / Solderability
Castability
Same in both: Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
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 | Cb-752 | NbTi |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Cb-752 vs NbTi — frequently asked
Is NbTi stronger than Cb-752?
Yes. NbTi has a typical yield strength of 350 MPa (50.8 ksi) against 310 MPa (45 ksi) for Cb-752 — about 13% more. Tensile strength is 620 MPa (89.9 ksi) vs 450 MPa (65.3 ksi).
Which is cheaper, Cb-752 or NbTi?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Cb-752 or NbTi?
Cb-752, by a small margin. Both rate poor for machinability — 30/100 against 20/100 for NbTi; for welding the order is Cb-752 first (very good, 70/100) then NbTi (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Cb-752 and NbTi 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.