Refractory Metal Pure Re-CW vs Pure Re-SR
Refractory Metal · Pure Re temper comparison
Pure Re-CW and Pure Re-SR are two conditions of the same refractory metal grade, Pure Re: CW (cold worked) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. Pure Re-CW is the stronger of the two: yield strength 1,900 MPa (276 ksi) against 1,200 MPa (174 ksi) for Pure Re-SR, about 58% more; tensile strength follows at 2,100 MPa (305 ksi) vs 1,550 MPa (225 ksi). In exchange, Pure Re-SR is the more ductile: elongation 10% versus 3% for Pure Re-CW, and Pure Re-SR is harder (470 HB vs 235 HB). Pure Re-SR runs hotter in service (1,400°C vs 1,200°C continuous).
Pure Re-CWChoose it when strength drives the design.
Pure Re-SRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Pure Re-CW vs Pure Re-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 C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 463 GPa67.2 Msi · Shear Modulus 178 GPa25.8 Msi · Bulk Modulus 370 GPa53.7 Msi · Poisson's Ratio 0.3 · Hardness, Rockwell B 100 HRB
Physical
Density and transition temperatures.
Same in both: Density 21.02 g/cm³0.76 lb/in³ · Melting Point (Solidus) 3,186°C5,767 °F · Liquidus Temperature 3,186°C5,767 °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 137 J/kg·K0.03 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 6.2 µm/m·K3.4 µin/in·°F · Latent Heat of Fusion 178 J/g76.5 BTU/lb · Min Service Temperature -269°C-452 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 70 / 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 55 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 11,000 MJ/kg4,729,153 BTU/lb · Embodied Carbon (primary production) 700 kg CO₂/kg · Typical Recycled Content 30%
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.
Pure Re-CW vs Pure Re-SR — frequently asked
Is Pure Re-CW stronger than Pure Re-SR?
Yes. Pure Re-CW has a typical yield strength of 1,900 MPa (276 ksi) against 1,200 MPa (174 ksi) for Pure Re-SR — about 58% more. Tensile strength is 2,100 MPa (305 ksi) vs 1,550 MPa (225 ksi).
Which condition does FabDigit quote by default, CW or SR?
Vacuum Annealed is the default Pure Re 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, Pure Re-CW or Pure Re-SR?
Pure Re-SR. Its weldability rates poor (25/100) against poor (20/100) for Pure Re-CW.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Pure Re-CW and Pure Re-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.