Precious Metal Britannia Silver (958) vs Coin Silver 900
Precious Metal · grade comparison
Precious Metal Britannia Silver (958) and Coin Silver 900 are both precious metal grades. Coin Silver 900 is the stronger of the two: yield strength 100 MPa (14.5 ksi) against 60 MPa (8.7 ksi) for Britannia Silver (958), about 67% more; tensile strength follows at 290 MPa (42.1 ksi) vs 240 MPa (34.8 ksi). In exchange, Britannia Silver (958) is the more ductile: elongation 48% versus 40% for Coin Silver 900, and Coin Silver 900 is harder (66 HB vs 47 HB). Coin Silver 900 runs hotter in service (250°C vs 200°C continuous) and Britannia Silver (958) conducts heat better (385 W/m·K vs 330 W/m·K). On the shop floor, Britannia Silver (958) welds better (very good vs good).
Britannia Silver (958)Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
Coin Silver 900Choose it when strength drives the design, or when the part sees heat.
Britannia Silver (958) vs Coin Silver 900: 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.
Britannia Silver (958)Coin Silver 900
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Hardness, Rockwell B
Same in both: Poisson's Ratio 0.37
Physical
Density and transition temperatures.
Density
Liquidus Temperature
Same in both: Melting Point (Solidus) 779°C1,434 °F
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)
Castability
Polishability
Same in both: Brazeability / Solderability 95 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
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 | Britannia Silver (958) | Coin Silver 900 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Britannia Silver (958) vs Coin Silver 900 — frequently asked
Is Coin Silver 900 stronger than Britannia Silver (958)?
Yes. Coin Silver 900 has a typical yield strength of 100 MPa (14.5 ksi) against 60 MPa (8.7 ksi) for Britannia Silver (958) — about 67% more. Tensile strength is 290 MPa (42.1 ksi) vs 240 MPa (34.8 ksi).
Which is cheaper, Britannia Silver (958) or Coin Silver 900?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Britannia Silver (958) or Coin Silver 900?
Britannia Silver (958), by a small margin. Both rate fair for machinability — 45/100 against 40/100 for Coin Silver 900; for welding the order is Britannia Silver (958) first (very good, 70/100) then Coin Silver 900 (good, 55/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Britannia Silver (958) and Coin Silver 900 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.