Precious Metal Pt95Co5-AC vs Pt95Co5-H04
Precious Metal · Pt95Co5 temper comparison
Pt95Co5-AC and Pt95Co5-H04 are two conditions of the same precious metal grade, Pt95Co5: AC (spheroidize annealed) versus H04 (full hard). The chemistry is identical, so every difference below comes from the condition. Pt95Co5-H04 is the stronger of the two: yield strength 620 MPa (89.9 ksi) against 250 MPa (36.3 ksi) for Pt95Co5-AC, about 148% more; tensile strength follows at 720 MPa (104 ksi) vs 480 MPa (69.6 ksi). In exchange, Pt95Co5-AC is the more ductile: elongation 20% versus 3% for Pt95Co5-H04, and Pt95Co5-H04 is harder (209 HB vs 128 HB). Pt95Co5-AC runs hotter in service (800°C vs 300°C continuous). On the shop floor, Pt95Co5-H04 machines more easily (50 vs 35 out of 100) and Pt95Co5-AC welds better (excellent vs very good).
Pt95Co5-ACChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Pt95Co5-H04Choose it when strength drives the design, or when the part is machined in volume.
Pt95Co5-AC vs Pt95Co5-H04: 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
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 62 GPa9 Msi · Bulk Modulus 240 GPa34.8 Msi · Poisson's Ratio 0.39
Physical
Density and transition temperatures.
Same in both: Density 20 g/cm³0.72 lb/in³ · Melting Point (Solidus) 1,745°C3,173 °F · Liquidus Temperature 1,765°C3,209 °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) 9.2 µm/m·K5.1 µin/in·°F · Latent Heat of Fusion 110 J/g47.3 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 96 / 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 85 / 100 · Brazeability / Solderability 80 / 100 · Polishability 85 / 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) 13,000 kg CO₂/kg · Embodied Water 250,000 L/kg29,957 gal/lb · Typical Recycled Content 35%
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.
Pt95Co5-AC vs Pt95Co5-H04 — frequently asked
Is Pt95Co5-H04 stronger than Pt95Co5-AC?
Yes. Pt95Co5-H04 has a typical yield strength of 620 MPa (89.9 ksi) against 250 MPa (36.3 ksi) for Pt95Co5-AC — about 148% more. Tensile strength is 720 MPa (104 ksi) vs 480 MPa (69.6 ksi).
Which condition does FabDigit quote by default, AC or H04?
AC is the default Pt95Co5 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, Pt95Co5-AC or Pt95Co5-H04?
Pt95Co5-H04, by a small margin. Both rate fair for machinability — 50/100 against 35/100 for Pt95Co5-AC; for welding the order is Pt95Co5-AC first (excellent, 85/100) then Pt95Co5-H04 (very good, 70/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Pt95Co5-AC and Pt95Co5-H04 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.