Precious Metal Coin Silver 900 vs S990
Precious Metal · grade comparison
Precious Metal Coin Silver 900 and S990 are both precious metal grades. Coin Silver 900 is the stronger of the two: yield strength 100 MPa (14.5 ksi) against 50 MPa (7.25 ksi) for S990, about 100% more; tensile strength follows at 290 MPa (42.1 ksi) vs 150 MPa (21.8 ksi). In exchange, S990 is the more ductile: elongation 45% versus 40% for Coin Silver 900, and Coin Silver 900 is harder (66 HB vs 30 HB). S990 runs hotter in service (400°C vs 250°C continuous) and S990 conducts heat better (405 W/m·K vs 330 W/m·K). On the shop floor, S990 machines more easily (50 vs 40 out of 100).
Coin Silver 900Choose it when strength drives the design.
S990Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Coin Silver 900 vs S990: 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.
Bulk Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Reduction in Area
Same in both: Elastic (Young's) Modulus 78 GPa11.3 Msi · Shear Modulus 29 GPa4.2 Msi · Poisson's Ratio 0.37
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Same in both: Latent Heat of Fusion 105 J/g45.1 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).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Polishability
Same in both: Castability 80 / 100 · Brazeability / Solderability 95 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Embodied Water
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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.
Manufacturing and finishing
| Capability | Coin Silver 900 | S990 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Coin Silver 900 vs S990 — frequently asked
Is Coin Silver 900 stronger than S990?
Yes. Coin Silver 900 has a typical yield strength of 100 MPa (14.5 ksi) against 50 MPa (7.25 ksi) for S990 — about 100% more. Tensile strength is 290 MPa (42.1 ksi) vs 150 MPa (21.8 ksi).
Which is cheaper, Coin Silver 900 or S990?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Coin Silver 900 or S990?
S990, by a small margin. Both rate fair for machinability — 50/100 against 40/100 for Coin Silver 900; for welding the order is S990 first (good, 60/100) then Coin Silver 900 (good, 55/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Coin Silver 900 and S990 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.