Precious Metal Pt95Ru5 1/4H vs Pt95Ru5 Spring
Precious Metal · Pt95Ru5 temper comparison
Pt95Ru5 1/4H and Pt95Ru5 Spring are two conditions of the same precious metal grade, Pt95Ru5: 1/4H (quarter hard) versus Spring (spring hard). The chemistry is identical, so every difference below comes from the condition. Pt95Ru5 Spring is the stronger of the two: yield strength 780 MPa (113 ksi) against 380 MPa (55.1 ksi) for Pt95Ru5 1/4H, about 105% more; tensile strength follows at 830 MPa (120 ksi) vs 500 MPa (72.5 ksi). In exchange, Pt95Ru5 1/4H is the more ductile: elongation 15% versus 1.5% for Pt95Ru5 Spring, and Pt95Ru5 Spring is harder (237 HB vs 157 HB). Pt95Ru5 1/4H runs hotter in service (700°C vs 400°C continuous). On the shop floor, Pt95Ru5 Spring machines more easily (45 vs 35 out of 100) and Pt95Ru5 1/4H welds better (very good vs good).
Pt95Ru5 1/4HChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Pt95Ru5 SpringChoose it when strength drives the design, or when the part is machined in volume.
Pt95Ru5 1/4H vs Pt95Ru5 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 68 GPa9.9 Msi · Bulk Modulus 285 GPa41.3 Msi · Poisson's Ratio 0.38
Physical
Density and transition temperatures.
Same in both: Density 20.67 g/cm³0.75 lb/in³ · Melting Point (Solidus) 1,780°C3,236 °F · Liquidus Temperature 1,795°C3,263 °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 135 J/kg·K0.03 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 9.1 µm/m·K5.1 µin/in·°F · Latent Heat of Fusion 113 J/g48.6 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) 0.25 V · Corrosion Resistance 99 / 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 55 / 100 · Brazeability / Solderability 80 / 100 · Polishability 90 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 240,000 MJ/kg1.03×10⁸ BTU/lb · Embodied Carbon (primary production) 14,000 kg CO₂/kg · Embodied Water 250,000 L/kg29,957 gal/lb · Typical Recycled Content 40%
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.
Pt95Ru5 1/4H vs Pt95Ru5 Spring — frequently asked
Is Pt95Ru5 Spring stronger than Pt95Ru5 1/4H?
Yes. Pt95Ru5 Spring has a typical yield strength of 780 MPa (113 ksi) against 380 MPa (55.1 ksi) for Pt95Ru5 1/4H — about 105% more. Tensile strength is 830 MPa (120 ksi) vs 500 MPa (72.5 ksi).
Which condition does FabDigit quote by default, 1/4H or Spring?
Annealed is the default Pt95Ru5 condition in the FabDigit quote flow (neither 1/4H nor Spring). 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, Pt95Ru5 1/4H or Pt95Ru5 Spring?
Pt95Ru5 Spring, by a small margin. Both rate fair for machinability — 45/100 against 35/100 for Pt95Ru5 1/4H; for welding the order is Pt95Ru5 1/4H first (very good, 75/100) then Pt95Ru5 Spring (good, 60/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Pt95Ru5 1/4H and Pt95Ru5 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.