Refractory Metal 5N Tantalum (99.999%)-CW vs 5N Tantalum (99.999%)-SR
Refractory Metal · 5N Tantalum (99.999%) temper comparison
5N Tantalum (99.999%)-CW and 5N Tantalum (99.999%)-SR are two conditions of the same refractory metal grade, 5N Tantalum (99.999%): CW (cold worked) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. 5N Tantalum (99.999%)-CW is the stronger of the two: yield strength 400 MPa (58 ksi) against 240 MPa (34.8 ksi) for 5N Tantalum (99.999%)-SR, about 67% more; tensile strength follows at 450 MPa (65.3 ksi) vs 300 MPa (43.5 ksi). In exchange, 5N Tantalum (99.999%)-SR is the more ductile: elongation 22% versus 7% for 5N Tantalum (99.999%)-CW, and 5N Tantalum (99.999%)-CW is harder (152 HB vs 105 HB). 5N Tantalum (99.999%)-SR runs hotter in service (275°C vs 250°C continuous).
5N Tantalum (99.999%)-CWChoose it when strength drives the design.
5N Tantalum (99.999%)-SRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
5N Tantalum (99.999%)-CW vs 5N Tantalum (99.999%)-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.
5N Tantalum (99.999%)-CW5N Tantalum (99.999%)-SR
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 186 GPa27 Msi · Shear Modulus 69 GPa10 Msi · Bulk Modulus 200 GPa29 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 16.65 g/cm³0.6 lb/in³ · Melting Point (Solidus) 3,017°C5,463 °F · Liquidus Temperature 3,017°C5,463 °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 140 J/kg·K0.03 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 6.5 µm/m·K3.6 µin/in·°F · Latent Heat of Fusion 202 J/g86.8 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).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.05 V
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: Castability 25 / 100 · Brazeability / Solderability 45 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 4,500 MJ/kg1,934,654 BTU/lb · Embodied Carbon (primary production) 270 kg CO₂/kg · Embodied Water 5,000 L/kg599 gal/lb · 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.
5N Tantalum (99.999%)-CW vs 5N Tantalum (99.999%)-SR — frequently asked
Is 5N Tantalum (99.999%)-CW stronger than 5N Tantalum (99.999%)-SR?
Yes. 5N Tantalum (99.999%)-CW has a typical yield strength of 400 MPa (58 ksi) against 240 MPa (34.8 ksi) for 5N Tantalum (99.999%)-SR — about 67% more. Tensile strength is 450 MPa (65.3 ksi) vs 300 MPa (43.5 ksi).
Which condition does FabDigit quote by default, CW or SR?
Annealed is the default 5N Tantalum (99.999%) 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 is easier to machine, 5N Tantalum (99.999%)-CW or 5N Tantalum (99.999%)-SR?
5N Tantalum (99.999%)-CW. Its machinability rates fair (35/100) against poor (30/100) for 5N Tantalum (99.999%)-SR; for welding the order is 5N Tantalum (99.999%)-SR first (good, 58/100) then 5N Tantalum (99.999%)-CW (fair, 50/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 5N Tantalum (99.999%)-CW and 5N Tantalum (99.999%)-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.