Tungsten Alloy Pure W Sintered vs Pure W Stress Relieved
Tungsten Alloy · Pure W temper comparison
Pure W Sintered and Pure W Stress Relieved are two conditions of the same tungsten alloy grade, Pure W: Sintered versus Stress Relieved. The chemistry is identical, so every difference below comes from the condition. Pure W Stress Relieved is the stronger of the two: yield strength 550 MPa (79.8 ksi) against 300 MPa (43.5 ksi) for Pure W Sintered, about 83% more; tensile strength follows at 700 MPa (102 ksi) vs 350 MPa (50.8 ksi). Pure W Stress Relieved is the more ductile: elongation 5% versus 0.5% for Pure W Sintered, and Pure W Stress Relieved is harder (355 HB vs 290 HB). Pure W Sintered is lighter (18.6 g/cm³ vs 19.25 g/cm³ for Pure W Stress Relieved) and Pure W Stress Relieved is stiffer (400 GPa vs 350 GPa).
Pure W SinteredChoose it when weight is the constraint.
Pure W Stress RelievedChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
Pure W Sintered vs Pure W Stress Relieved: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all tungsten alloy 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 tungsten alloy 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.
Pure W SinteredPure W Stress Relieved
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
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: Shear Modulus 156 GPa22.6 Msi · Bulk Modulus 310 GPa45 Msi · Poisson's Ratio 0.28
Physical
Density and transition temperatures.
Density
Same in both: Melting Point (Solidus) 3,422°C6,192 °F · Liquidus Temperature 3,422°C6,192 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 133 J/kg·K0.03 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 4.5 µm/m·K2.5 µin/in·°F · Latent Heat of Fusion 192 J/g82.5 BTU/lb · Max Service Temperature (continuous) 500°C932 °F · Min Service Temperature 20°C68 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.12 V · Corrosion Resistance 60 / 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: Castability 3 / 100 · Brazeability / Solderability 60 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 400 MJ/kg171,969 BTU/lb · Embodied Carbon (primary production) 27 kg CO₂/kg · Typical Recycled Content 30%
Strength versus weight
Yield strength against density for every tungsten alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Pure W Sintered vs Pure W Stress Relieved — frequently asked
Is Pure W Stress Relieved stronger than Pure W Sintered?
Yes. Pure W Stress Relieved has a typical yield strength of 550 MPa (79.8 ksi) against 300 MPa (43.5 ksi) for Pure W Sintered — about 83% more. Tensile strength is 700 MPa (102 ksi) vs 350 MPa (50.8 ksi).
Which condition does FabDigit quote by default, Sintered or Stress Relieved?
As Rolled is the default Pure W condition in the FabDigit quote flow (neither Sintered nor Stress Relieved). 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.
When should I choose Pure W Sintered over Pure W Stress Relieved?
Pick Pure W Sintered when weight is the constraint. Pick Pure W Stress Relieved when strength drives the design, or when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Pure W Sintered and Pure W Stress Relieved 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.