Precious Metal Coin Silver 900-H08 vs Coin Silver 900-O
Precious Metal · Coin Silver 900 temper comparison
Coin Silver 900-H08 and Coin Silver 900-O are two conditions of the same precious metal grade, Coin Silver 900: H08 (spring hard) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. Coin Silver 900-H08 is the stronger of the two: yield strength 480 MPa (69.6 ksi) against 100 MPa (14.5 ksi) for Coin Silver 900-O, about 4.8 times as much; tensile strength follows at 540 MPa (78.3 ksi) vs 290 MPa (42.1 ksi). In exchange, Coin Silver 900-O is the more ductile: elongation 40% versus 2% for Coin Silver 900-H08, and Coin Silver 900-H08 is harder (147 HB vs 66 HB). On the shop floor, Coin Silver 900-H08 machines more easily (good vs fair).
Coin Silver 900-H08Choose it when strength drives the design, or when the part is machined in volume.
Coin Silver 900-OChoose it when the part is bent, formed or impact-loaded.
Coin Silver 900-H08 vs Coin Silver 900-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.
Coin Silver 900-H08Coin Silver 900-O
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, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 78 GPa11.3 Msi · Shear Modulus 29 GPa4.2 Msi · Bulk Modulus 103 GPa14.9 Msi · Poisson's Ratio 0.37 · Shear Strength 185 MPa26.8 ksi
Physical
Density and transition temperatures.
Same in both: Density 10.31 g/cm³0.37 lb/in³ · Melting Point (Solidus) 779°C1,434 °F · Liquidus Temperature 875°C1,607 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 330 W/m·K191 BTU/hr·ft·°F · Specific Heat Capacity 240 J/kg·K0.06 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 18.9 µm/m·K10.5 µin/in·°F · Latent Heat of Fusion 105 J/g45.1 BTU/lb · Max Service Temperature (continuous) 250°C482 °F · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 2.03×10⁻⁸ Ω·m0.799 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) 0.1 V · Corrosion Resistance 70 / 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 %) 40% · Weldability 55 / 100 · Castability 80 / 100 · Brazeability / Solderability 95 / 100 · Polishability 95 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 1,450 MJ/kg623,388 BTU/lb · Embodied Carbon (primary production) 100 kg CO₂/kg · Typical Recycled Content 40%
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.
Coin Silver 900-H08 vs Coin Silver 900-O — frequently asked
Is Coin Silver 900-H08 stronger than Coin Silver 900-O?
Yes. Coin Silver 900-H08 has a typical yield strength of 480 MPa (69.6 ksi) against 100 MPa (14.5 ksi) for Coin Silver 900-O — about 4.8 times as much. Tensile strength is 540 MPa (78.3 ksi) vs 290 MPa (42.1 ksi).
Which condition does FabDigit quote by default, H08 or O?
O is the default Coin Silver 900 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, Coin Silver 900-H08 or Coin Silver 900-O?
Coin Silver 900-H08. Its machinability rates good (62/100) against fair (40/100) for Coin Silver 900-O.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Coin Silver 900-H08 and Coin Silver 900-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.