Precious Metal Pt99.95 Annealed vs Pt99.95-H08
Precious Metal · Pt99.95 temper comparison
Pt99.95 Annealed and Pt99.95-H08 are two conditions of the same precious metal grade, Pt99.95: Annealed versus H08 (spring hard). The chemistry is identical, so every difference below comes from the condition. Pt99.95-H08 is the stronger of the two: yield strength 230 MPa (33.4 ksi) against 45 MPa (6.53 ksi) for Pt99.95 Annealed, about 5.1 times as much; tensile strength follows at 255 MPa (37 ksi) vs 140 MPa (20.3 ksi). In exchange, Pt99.95 Annealed is the more ductile: elongation 40% versus 2% for Pt99.95-H08, and Pt99.95-H08 is harder (103 HB vs 39 HB). Pt99.95 Annealed runs hotter in service (1,500°C vs 200°C continuous). On the shop floor, Pt99.95-H08 machines more easily (fair vs poor) and Pt99.95 Annealed welds better (excellent vs very good).
Pt99.95 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Pt99.95-H08Choose it when strength drives the design, or when the part is machined in volume.
Pt99.95 Annealed vs Pt99.95-H08: 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
Reduction in Area
Shear Strength
Hardness, Brinell
Hardness, Vickers
Same in both: Shear Modulus 61 GPa8.8 Msi · Bulk Modulus 230 GPa33.4 Msi · Poisson's Ratio 0.38
Physical
Density and transition temperatures.
Same in both: Density 21.45 g/cm³0.77 lb/in³ · Melting Point (Solidus) 1,768°C3,214 °F · Liquidus Temperature 1,768°C3,214 °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 113 J/g48.6 BTU/lb · Min Service Temperature -253°C-423 °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 100 / 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 92 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 210,000 MJ/kg9.03×10⁷ BTU/lb · Embodied Carbon (primary production) 14,000 kg CO₂/kg · Embodied Water 200,000 L/kg23,965 gal/lb · Typical Recycled Content 30%
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.
Pt99.95 Annealed vs Pt99.95-H08 — frequently asked
Is Pt99.95-H08 stronger than Pt99.95 Annealed?
Yes. Pt99.95-H08 has a typical yield strength of 230 MPa (33.4 ksi) against 45 MPa (6.53 ksi) for Pt99.95 Annealed — about 5.1 times as much. Tensile strength is 255 MPa (37 ksi) vs 140 MPa (20.3 ksi).
Which condition does FabDigit quote by default, Annealed or H08?
Annealed is the default Pt99.95 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, Pt99.95 Annealed or Pt99.95-H08?
Pt99.95-H08. Its machinability rates fair (35/100) against poor (25/100) for Pt99.95 Annealed; for welding the order is Pt99.95 Annealed first (excellent, 90/100) then Pt99.95-H08 (very good, 78/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Pt99.95 Annealed and Pt99.95-H08 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.