Precious Metal PdCu Annealed vs PdCu Spring
Precious Metal · PdCu temper comparison
PdCu Annealed and PdCu Spring are two conditions of the same precious metal grade, PdCu: Annealed versus Spring (spring hard). The chemistry is identical, so every difference below comes from the condition. PdCu Spring is the stronger of the two: yield strength 950 MPa (138 ksi) against 240 MPa (34.8 ksi) for PdCu Annealed, about 4.0 times as much; tensile strength follows at 1,050 MPa (152 ksi) vs 500 MPa (72.5 ksi). In exchange, PdCu Annealed is the more ductile: elongation 28% versus 2% for PdCu Spring, and PdCu Spring is harder (275 HB vs 130 HB). PdCu Annealed runs hotter in service (500°C vs 250°C continuous). On the shop floor, PdCu Spring machines more easily (fair vs poor) and PdCu Annealed welds better (65 vs 55 out of 100).
PdCu AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
PdCu SpringChoose it when strength drives the design, or when the part is machined in volume.
PdCu Annealed vs PdCu Spring: 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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Same in both: Shear Modulus 48 GPa7 Msi · Bulk Modulus 155 GPa22.5 Msi · Poisson's Ratio 0.37
Physical
Density and transition temperatures.
Same in both: Density 10.4 g/cm³0.38 lb/in³ · Melting Point (Solidus) 1,000°C1,832 °F · Liquidus Temperature 1,020°C1,868 °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 300 J/kg·K0.07 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 14 µm/m·K7.8 µin/in·°F · Latent Heat of Fusion 176 J/g75.7 BTU/lb · Min Service Temperature -200°C-328 °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 85 / 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 70 / 100 · Brazeability / Solderability 85 / 100 · Polishability 90 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 70,000 MJ/kg3.01×10⁷ BTU/lb · Embodied Carbon (primary production) 2,500 kg CO₂/kg · Embodied Water 60,000 L/kg7,190 gal/lb · 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.
PdCu Annealed vs PdCu Spring — frequently asked
Is PdCu Spring stronger than PdCu Annealed?
Yes. PdCu Spring has a typical yield strength of 950 MPa (138 ksi) against 240 MPa (34.8 ksi) for PdCu Annealed — about 4.0 times as much. Tensile strength is 1,050 MPa (152 ksi) vs 500 MPa (72.5 ksi).
Which condition does FabDigit quote by default, Annealed or Spring?
Annealed is the default PdCu condition in the FabDigit quote flow. 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, PdCu Annealed or PdCu Spring?
PdCu Spring. Its machinability rates fair (40/100) against poor (30/100) for PdCu Annealed; for welding the order is PdCu Annealed first (good, 65/100) then PdCu Spring (good, 55/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in PdCu Annealed and PdCu Spring 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.