Precious Metal PdRu5 Spring vs PdRu5 Stress-relieved
Precious Metal · PdRu5 temper comparison
PdRu5 Spring and PdRu5 Stress-relieved are two conditions of the same precious metal grade, PdRu5: Spring (spring hard) versus Stress-relieved. The chemistry is identical, so every difference below comes from the condition. PdRu5 Spring is the stronger of the two: yield strength 960 MPa (139 ksi) against 790 MPa (115 ksi) for PdRu5 Stress-relieved, about 22% more; tensile strength follows at 1,050 MPa (152 ksi) vs 860 MPa (125 ksi). In exchange, PdRu5 Stress-relieved is the more ductile: elongation 3% versus 1.5% for PdRu5 Spring, and PdRu5 Spring is harder (250 HB vs 209 HB). PdRu5 Stress-relieved runs hotter in service (350°C vs 250°C continuous).
PdRu5 SpringChoose it when strength drives the design.
PdRu5 Stress-relievedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
PdRu5 Spring vs PdRu5 Stress-relieved: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all precious 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 precious 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.
PdRu5 SpringPdRu5 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
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 50 GPa7.3 Msi · Bulk Modulus 195 GPa28.3 Msi · Poisson's Ratio 0.39
Physical
Density and transition temperatures.
Same in both: Density 12.05 g/cm³0.44 lb/in³ · Melting Point (Solidus) 1,575°C2,867 °F · Liquidus Temperature 1,600°C2,912 °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 245 J/kg·K0.06 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.5 µm/m·K6.4 µin/in·°F · Latent Heat of Fusion 157 J/g67.5 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: Galvanic Potential (seawater, vs SCE) 0.2 V · Corrosion Resistance 92 / 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 40 / 100 · Brazeability / Solderability 80 / 100 · Polishability 90 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 95,000 MJ/kg4.08×10⁷ BTU/lb · Embodied Carbon (primary production) 3,800 kg CO₂/kg · Typical Recycled Content 55%
Strength versus weight
Yield strength against density for every precious metal grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
PdRu5 Spring vs PdRu5 Stress-relieved — frequently asked
Is PdRu5 Spring stronger than PdRu5 Stress-relieved?
Yes. PdRu5 Spring has a typical yield strength of 960 MPa (139 ksi) against 790 MPa (115 ksi) for PdRu5 Stress-relieved — about 22% more. Tensile strength is 1,050 MPa (152 ksi) vs 860 MPa (125 ksi).
Which condition does FabDigit quote by default, Spring or Stress-relieved?
Annealed is the default PdRu5 condition in the FabDigit quote flow (neither Spring 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.
Which is easier to machine, PdRu5 Spring or PdRu5 Stress-relieved?
PdRu5 Spring, by a small margin. Both rate fair for machinability — 40/100 against 35/100 for PdRu5 Stress-relieved; for welding the order is PdRu5 Stress-relieved first (fair, 50/100) then PdRu5 Spring (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in PdRu5 Spring and PdRu5 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.