Refractory Metal Cb-752-CW vs Cb-752-SR
Refractory Metal · Cb-752 temper comparison
Cb-752-CW and Cb-752-SR are two conditions of the same refractory metal grade, Cb-752: CW (cold worked) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. Cb-752-CW is the stronger of the two: yield strength 620 MPa (89.9 ksi) against 470 MPa (68.2 ksi) for Cb-752-SR, about 32% more; tensile strength follows at 690 MPa (100 ksi) vs 550 MPa (79.8 ksi). In exchange, Cb-752-SR is the more ductile: elongation 18% versus 8% for Cb-752-CW, and Cb-752-CW is harder (246 HB vs 208 HB). Cb-752-SR runs hotter in service (1,200°C vs 900°C continuous).
Cb-752-CWChoose it when strength drives the design.
Cb-752-SRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Cb-752-CW vs Cb-752-SR: 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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
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 B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 110 GPa16 Msi · Shear Modulus 40 GPa5.8 Msi · Bulk Modulus 170 GPa24.7 Msi · Poisson's Ratio 0.38
Physical
Density and transition temperatures.
Same in both: Density 9.03 g/cm³0.33 lb/in³ · Melting Point (Solidus) 2,470°C4,478 °F · Liquidus Temperature 2,500°C4,532 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 270 J/kg·K0.06 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 7.1 µm/m·K3.9 µin/in·°F · Latent Heat of Fusion 285 J/g123 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 72 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Brazeability / Solderability 60 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 950 MJ/kg408,427 BTU/lb · Embodied Carbon (primary production) 62 kg CO₂/kg · Typical Recycled Content 25%
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.
Cb-752-CW vs Cb-752-SR — frequently asked
Is Cb-752-CW stronger than Cb-752-SR?
Yes. Cb-752-CW has a typical yield strength of 620 MPa (89.9 ksi) against 470 MPa (68.2 ksi) for Cb-752-SR — about 32% more. Tensile strength is 690 MPa (100 ksi) vs 550 MPa (79.8 ksi).
Which condition does FabDigit quote by default, CW or SR?
RX is the default Cb-752 condition in the FabDigit quote flow (neither CW nor SR). The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which welds better, Cb-752-CW or Cb-752-SR?
Cb-752-SR. Its weldability rates good (68/100) against good (60/100) for Cb-752-CW.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Cb-752-CW and Cb-752-SR 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.