Precious Metal Pt70Rh30/Pt94Rh6 vs Pt87Rh13
Precious Metal · grade comparison
Precious Metal Pt70Rh30/Pt94Rh6 and Pt87Rh13 are both precious metal grades. Pt70Rh30/Pt94Rh6 is the stronger of the two: yield strength 250 MPa (36.3 ksi) against 190 MPa (27.6 ksi) for Pt87Rh13, about 32% more; tensile strength follows at 550 MPa (79.8 ksi) vs 380 MPa (55.1 ksi). In exchange, Pt87Rh13 is the more ductile: elongation 32% versus 28% for Pt70Rh30/Pt94Rh6, and Pt70Rh30/Pt94Rh6 is harder (125 HV vs 90 HV). Pt70Rh30/Pt94Rh6 is lighter (17.6 g/cm³ vs 19.6 g/cm³ for Pt87Rh13) and Pt70Rh30/Pt94Rh6 is stiffer (225 GPa vs 205 GPa). On the shop floor, Pt87Rh13 machines more easily (fair vs poor).
Pt70Rh30/Pt94Rh6Choose it when strength drives the design, or when weight is the constraint.
Pt87Rh13Choose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
Pt70Rh30/Pt94Rh6 vs Pt87Rh13: 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
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Hardness, Vickers
Hardness, Brinell
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)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Brazeability / Solderability
Polishability
Same in both: Castability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Same in both: Embodied Energy (primary production) 300,000 MJ/kg1.29×10⁸ BTU/lb
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 | Pt70Rh30/Pt94Rh6 | Pt87Rh13 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Pt70Rh30/Pt94Rh6 vs Pt87Rh13 — frequently asked
Is Pt70Rh30/Pt94Rh6 stronger than Pt87Rh13?
Yes. Pt70Rh30/Pt94Rh6 has a typical yield strength of 250 MPa (36.3 ksi) against 190 MPa (27.6 ksi) for Pt87Rh13 — about 32% more. Tensile strength is 550 MPa (79.8 ksi) vs 380 MPa (55.1 ksi).
Which is cheaper, Pt70Rh30/Pt94Rh6 or Pt87Rh13?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Pt70Rh30/Pt94Rh6 or Pt87Rh13?
Pt87Rh13. Its machinability rates fair (35/100) against poor (25/100) for Pt70Rh30/Pt94Rh6; for welding the order is Pt70Rh30/Pt94Rh6 first (excellent, 85/100) then Pt87Rh13 (very good, 80/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Pt70Rh30/Pt94Rh6 and Pt87Rh13 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.