Precious Metal 800 Silver vs Britannia Silver (958)
Precious Metal · grade comparison
Precious Metal 800 Silver and Britannia Silver (958) are both precious metal grades. 800 Silver is the stronger of the two: yield strength 130 MPa (18.9 ksi) against 60 MPa (8.7 ksi) for Britannia Silver (958), about 117% more; tensile strength follows at 300 MPa (43.5 ksi) vs 240 MPa (34.8 ksi). In exchange, Britannia Silver (958) is the more ductile: elongation 48% versus 40% for 800 Silver, and 800 Silver is harder (75 HB vs 47 HB). 800 Silver runs hotter in service (250°C vs 200°C continuous) and Britannia Silver (958) conducts heat better (385 W/m·K vs 320 W/m·K).
800 SilverChoose it when strength drives the design, or when the part sees heat.
Britannia Silver (958)Choose it when the part is bent, formed or impact-loaded.
800 Silver vs Britannia Silver (958): 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.
800 SilverBritannia Silver (958)
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
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
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)
Latent Heat of Fusion
Max Service Temperature (continuous)
Same in both: 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 Rating (AISI 1212 = 100 %)
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Same in both: Machinability 45 / 100 · Weldability 70 / 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
Same in both: Thermal Shock Resistance Index 64
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 | 800 Silver | Britannia Silver (958) |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
800 Silver vs Britannia Silver (958) — frequently asked
Is 800 Silver stronger than Britannia Silver (958)?
Yes. 800 Silver has a typical yield strength of 130 MPa (18.9 ksi) against 60 MPa (8.7 ksi) for Britannia Silver (958) — about 117% more. Tensile strength is 300 MPa (43.5 ksi) vs 240 MPa (34.8 ksi).
Which is cheaper, 800 Silver or Britannia Silver (958)?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose 800 Silver over Britannia Silver (958)?
Pick 800 Silver when strength drives the design, or when the part sees heat. Pick Britannia Silver (958) when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 800 Silver and Britannia Silver (958) 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.