Precious Metal Pt90Ir10 vs Pt90Rh10
Precious Metal · grade comparison
Precious Metal Pt90Ir10 and Pt90Rh10 are both precious metal grades. Pt90Ir10 is the stronger of the two: yield strength 210 MPa (30.5 ksi) against 170 MPa (24.7 ksi) for Pt90Rh10, about 24% more; tensile strength follows at 380 MPa (55.1 ksi) vs 320 MPa (46.4 ksi). In exchange, Pt90Rh10 is the more ductile: elongation 35% versus 27% for Pt90Ir10, and Pt90Ir10 is harder (105 HB vs 88 HB). Pt90Rh10 is lighter (19.97 g/cm³ vs 21.54 g/cm³ for Pt90Ir10) and Pt90Rh10 runs hotter in service (1,450°C vs 1,200°C continuous).
Pt90Ir10Choose it when strength drives the design.
Pt90Rh10Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
Pt90Ir10 vs Pt90Rh10: 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
Shear Modulus
Bulk Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Poisson's Ratio 0.39
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Latent Heat of Fusion 118 J/g50.7 BTU/lb
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Same in both: Corrosion Resistance 99 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Formability (cold)
Castability
Polishability
Same in both: Machinability 22 / 100 · Machinability Rating (AISI 1212 = 100 %) 20% · Weldability 75 / 100 · Brazeability / Solderability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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.
Manufacturing and finishing
| Capability | Pt90Ir10 | Pt90Rh10 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Pt90Ir10 vs Pt90Rh10 — frequently asked
Is Pt90Ir10 stronger than Pt90Rh10?
Yes. Pt90Ir10 has a typical yield strength of 210 MPa (30.5 ksi) against 170 MPa (24.7 ksi) for Pt90Rh10 — about 24% more. Tensile strength is 380 MPa (55.1 ksi) vs 320 MPa (46.4 ksi).
Which is cheaper, Pt90Ir10 or Pt90Rh10?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose Pt90Ir10 over Pt90Rh10?
Pick Pt90Ir10 when strength drives the design. Pick Pt90Rh10 when the part is bent, formed or impact-loaded, or when weight is the constraint.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Pt90Ir10 and Pt90Rh10 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.