Precious Metal Pt90Ir10-H04 vs Pt90Ir10-SR
Precious Metal · Pt90Ir10 temper comparison
Pt90Ir10-H04 and Pt90Ir10-SR are two conditions of the same precious metal grade, Pt90Ir10: H04 (full hard) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. Pt90Ir10-H04 is the stronger of the two: yield strength 830 MPa (120 ksi) against 480 MPa (69.6 ksi) for Pt90Ir10-SR, about 73% more; tensile strength follows at 950 MPa (138 ksi) vs 620 MPa (89.9 ksi). In exchange, Pt90Ir10-SR is the more ductile: elongation 10% versus 2.5% for Pt90Ir10-H04, and Pt90Ir10-H04 is harder (245 HB vs 166 HB). Pt90Ir10-SR runs hotter in service (800°C vs 500°C continuous). On the shop floor, Pt90Ir10-SR welds better (good vs fair).
Pt90Ir10-H04Choose it when strength drives the design.
Pt90Ir10-SRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Pt90Ir10-H04 vs Pt90Ir10-SR: 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
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 72 GPa10.4 Msi · Bulk Modulus 255 GPa37 Msi · Poisson's Ratio 0.39
Physical
Density and transition temperatures.
Same in both: Density 21.54 g/cm³0.78 lb/in³ · Melting Point (Solidus) 1,780°C3,236 °F · Liquidus Temperature 1,800°C3,272 °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 133 J/kg·K0.03 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 8.8 µm/m·K4.9 µin/in·°F · Latent Heat of Fusion 118 J/g50.7 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) 0.25 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 40 / 100 · Brazeability / Solderability 60 / 100 · Polishability 92 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 250,000 MJ/kg1.07×10⁸ BTU/lb · Embodied Carbon (primary production) 14,500 kg CO₂/kg · Embodied Water 260,000 L/kg31,155 gal/lb · Typical Recycled Content 45%
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.
Pt90Ir10-H04 vs Pt90Ir10-SR — frequently asked
Is Pt90Ir10-H04 stronger than Pt90Ir10-SR?
Yes. Pt90Ir10-H04 has a typical yield strength of 830 MPa (120 ksi) against 480 MPa (69.6 ksi) for Pt90Ir10-SR — about 73% more. Tensile strength is 950 MPa (138 ksi) vs 620 MPa (89.9 ksi).
Which condition does FabDigit quote by default, H04 or SR?
Annealed is the default Pt90Ir10 condition in the FabDigit quote flow (neither H04 nor SR). 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, Pt90Ir10-H04 or Pt90Ir10-SR?
Pt90Ir10-H04. Its machinability rates fair (35/100) against poor (29/100) for Pt90Ir10-SR; for welding the order is Pt90Ir10-SR first (good, 68/100) then Pt90Ir10-H04 (fair, 50/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Pt90Ir10-H04 and Pt90Ir10-SR 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.