Precious Metal AuCo5-H02 vs AuCo5-H04
Precious Metal · AuCo5 temper comparison
AuCo5-H02 and AuCo5-H04 are two conditions of the same precious metal grade, AuCo5: H02 (half hard) versus H04 (full hard). The chemistry is identical, so every difference below comes from the condition. AuCo5-H04 is the stronger of the two: yield strength 650 MPa (94.3 ksi) against 450 MPa (65.3 ksi) for AuCo5-H02, about 44% more; tensile strength follows at 750 MPa (109 ksi) vs 550 MPa (79.8 ksi). In exchange, AuCo5-H02 is the more ductile: elongation 8% versus 3% for AuCo5-H04, and AuCo5-H04 is harder (200 HV vs 160 HV). AuCo5-H02 runs hotter in service (250°C vs 200°C continuous).
AuCo5-H02Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
AuCo5-H04Choose it when strength drives the design.
AuCo5-H02 vs AuCo5-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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 95 GPa13.8 Msi · Shear Modulus 35 GPa5.1 Msi · Bulk Modulus 165 GPa23.9 Msi · Poisson's Ratio 0.41
Physical
Density and transition temperatures.
Same in both: Density 18.2 g/cm³0.66 lb/in³ · Melting Point (Solidus) 996°C1,825 °F · Liquidus Temperature 1,025°C1,877 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 65 W/m·K37.6 BTU/hr·ft·°F · Specific Heat Capacity 140 J/kg·K0.03 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 14.3 µm/m·K7.9 µin/in·°F · Latent Heat of Fusion 70 J/g30.1 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 92 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 30% · Weldability 70 / 100 · Castability 60 / 100 · Brazeability / Solderability 90 / 100 · Polishability 95 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 180,000 MJ/kg7.74×10⁷ BTU/lb · Embodied Carbon (primary production) 12,000 kg CO₂/kg · Embodied Water 150,000 L/kg17,974 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.
AuCo5-H02 vs AuCo5-H04 — frequently asked
Is AuCo5-H04 stronger than AuCo5-H02?
Yes. AuCo5-H04 has a typical yield strength of 650 MPa (94.3 ksi) against 450 MPa (65.3 ksi) for AuCo5-H02 — about 44% more. Tensile strength is 750 MPa (109 ksi) vs 550 MPa (79.8 ksi).
Which condition does FabDigit quote by default, H02 or H04?
H04 is the default AuCo5 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.
When should I choose AuCo5-H02 over AuCo5-H04?
Pick AuCo5-H02 when the part is bent, formed or impact-loaded, or when the part sees heat. Pick AuCo5-H04 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in AuCo5-H02 and AuCo5-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.