Precious Metal Britannia Silver (958) vs S800
Precious Metal · grade comparison
Precious Metal Britannia Silver (958) and S800 are both precious metal grades. S800 is the stronger of the two: yield strength 110 MPa (16 ksi) against 60 MPa (8.7 ksi) for Britannia Silver (958), about 83% more; tensile strength follows at 310 MPa (45 ksi) vs 240 MPa (34.8 ksi). In exchange, Britannia Silver (958) is the more ductile: elongation 48% versus 35% for S800, and S800 is harder (66 HB vs 47 HB). S800 is stiffer (80 GPa vs 76 GPa) and Britannia Silver (958) conducts heat better (385 W/m·K vs 300 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.
S800Choose it when strength drives the design.
Britannia Silver (958) vs S800: 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.
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
Reduction in Area
Charpy V-Notch Impact (RT)
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
Latent Heat of Fusion
Min Service Temperature
Same in both: Thermal Expansion (CTE, 20–100 °C) 19 µm/m·K10.6 µin/in·°F · Max Service Temperature (continuous) 200°C392 °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
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Same in both: Machinability Rating (AISI 1212 = 100 %) 45%
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) | S800 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Britannia Silver (958) vs S800 — frequently asked
Is S800 stronger than Britannia Silver (958)?
Yes. S800 has a typical yield strength of 110 MPa (16 ksi) against 60 MPa (8.7 ksi) for Britannia Silver (958) — about 83% more. Tensile strength is 310 MPa (45 ksi) vs 240 MPa (34.8 ksi).
Which is cheaper, Britannia Silver (958) or S800?
Both sit in the same relative cost tier ($$$$, 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 S800?
S800, by a small margin. Both rate fair for machinability — 50/100 against 45/100 for Britannia Silver (958); for welding the order is Britannia Silver (958) first (very good, 70/100) then S800 (good, 60/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Britannia Silver (958) and S800 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.