Precious Metal Silver 999-H04 vs Silver 999-O
Precious Metal · Silver 999 temper comparison
Silver 999-H04 and Silver 999-O are two conditions of the same precious metal grade, Silver 999: H04 (full hard) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. Silver 999-H04 is the stronger of the two: yield strength 220 MPa (31.9 ksi) against 55 MPa (7.98 ksi) for Silver 999-O, about 4.0 times as much; tensile strength follows at 265 MPa (38.4 ksi) vs 140 MPa (20.3 ksi). In exchange, Silver 999-O is the more ductile: elongation 48% versus 5% for Silver 999-H04, and Silver 999-H04 is harder (75 HB vs 25 HB). Silver 999-O runs hotter in service (250°C vs 120°C continuous). On the shop floor, Silver 999-H04 machines more easily (good vs fair).
Silver 999-H04Choose it when strength drives the design, or when the part is machined in volume.
Silver 999-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Silver 999-H04 vs Silver 999-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
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 76 GPa11 Msi · Shear Modulus 29.5 GPa4.3 Msi · Bulk Modulus 100 GPa14.5 Msi · Poisson's Ratio 0.37 · Reduction in Area 85% · Shear Strength 95 MPa13.8 ksi
Physical
Density and transition temperatures.
Same in both: Density 10.49 g/cm³0.38 lb/in³ · Melting Point (Solidus) 962°C1,763 °F · Liquidus Temperature 962°C1,763 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 429 W/m·K248 BTU/hr·ft·°F · Specific Heat Capacity 235 J/kg·K0.06 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 19.6 µm/m·K10.9 µin/in·°F · Latent Heat of Fusion 105 J/g45.1 BTU/lb · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 1.59×10⁻⁸ Ω·m0.626 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.11 V · Corrosion Resistance 80 / 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 %) 55% · Weldability 60 / 100 · Castability 85 / 100 · Brazeability / Solderability 96 / 100 · Polishability 98 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 1,550 MJ/kg666,381 BTU/lb · Embodied Carbon (primary production) 96 kg CO₂/kg · Embodied Water 250 L/kg30 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.
Silver 999-H04 vs Silver 999-O — frequently asked
Is Silver 999-H04 stronger than Silver 999-O?
Yes. Silver 999-H04 has a typical yield strength of 220 MPa (31.9 ksi) against 55 MPa (7.98 ksi) for Silver 999-O — about 4.0 times as much. Tensile strength is 265 MPa (38.4 ksi) vs 140 MPa (20.3 ksi).
Which condition does FabDigit quote by default, H04 or O?
O is the default Silver 999 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, Silver 999-H04 or Silver 999-O?
Silver 999-H04. Its machinability rates good (55/100) against fair (40/100) for Silver 999-O.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Silver 999-H04 and Silver 999-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.