Precious Metal Gold 24K-H04 vs Gold 24K-O
Precious Metal · Gold 24K temper comparison
Gold 24K-H04 and Gold 24K-O are two conditions of the same precious metal grade, Gold 24K: H04 (full hard) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. Gold 24K-H04 is the stronger of the two: yield strength 205 MPa (29.7 ksi) against 30 MPa (4.35 ksi) for Gold 24K-O, about 6.8 times as much; tensile strength follows at 220 MPa (31.9 ksi) vs 125 MPa (18.1 ksi). In exchange, Gold 24K-O is the more ductile: elongation 45% versus 4% for Gold 24K-H04, and Gold 24K-H04 is harder (55 HB vs 25 HB). Gold 24K-O runs hotter in service (700°C vs 100°C continuous). On the shop floor, Gold 24K-H04 machines more easily (good vs fair) and Gold 24K-O welds better (excellent vs very good).
Gold 24K-H04Choose it when strength drives the design, or when the part is machined in volume.
Gold 24K-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Gold 24K-H04 vs Gold 24K-O: 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
Reduction in Area
Shear Strength
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 78 GPa11.3 Msi · Shear Modulus 27 GPa3.9 Msi · Bulk Modulus 173 GPa25.1 Msi · Poisson's Ratio 0.42
Physical
Density and transition temperatures.
Same in both: Density 19.32 g/cm³0.7 lb/in³ · Melting Point (Solidus) 1,064°C1,948 °F · Liquidus Temperature 1,064°C1,948 °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 129 J/kg·K0.03 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 14.2 µm/m·K7.9 µin/in·°F · Latent Heat of Fusion 64 J/g27.4 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 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 88 / 100 · Brazeability / Solderability 95 / 100 · Polishability 95 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 260,000 MJ/kg1.12×10⁸ BTU/lb · Embodied Carbon (primary production) 25,000 kg CO₂/kg · Embodied Water 250,000 L/kg29,957 gal/lb · Typical Recycled Content 28%
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.
Gold 24K-H04 vs Gold 24K-O — frequently asked
Is Gold 24K-H04 stronger than Gold 24K-O?
Yes. Gold 24K-H04 has a typical yield strength of 205 MPa (29.7 ksi) against 30 MPa (4.35 ksi) for Gold 24K-O — about 6.8 times as much. Tensile strength is 220 MPa (31.9 ksi) vs 125 MPa (18.1 ksi).
Which condition does FabDigit quote by default, H04 or O?
O is the default Gold 24K 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, Gold 24K-H04 or Gold 24K-O?
Gold 24K-H04. Its machinability rates good (55/100) against fair (40/100) for Gold 24K-O; for welding the order is Gold 24K-O first (excellent, 85/100) then Gold 24K-H04 (very good, 75/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Gold 24K-H04 and Gold 24K-O 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.