Precious Metal BVAu-5 vs BVAu-7
Precious Metal · grade comparison
Precious Metal BVAu-5 and BVAu-7 are both precious metal grades. BVAu-7 is the stronger of the two: yield strength 200 MPa (29 ksi) against 150 MPa (21.8 ksi) for BVAu-5, about 33% more; tensile strength follows at 420 MPa (60.9 ksi) vs 340 MPa (49.3 ksi). In exchange, BVAu-5 is the more ductile: elongation 28% versus 25% for BVAu-7, and BVAu-7 is harder (110 HV vs 100 HV). BVAu-5 is lighter (11.3 g/cm³ vs 12.2 g/cm³ for BVAu-7) and BVAu-5 runs hotter in service (500°C vs 425°C continuous). On the shop floor, BVAu-5 machines more easily (45 vs 35 out of 100) and BVAu-5 welds better (fair vs poor).
BVAu-5Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
BVAu-7Choose it when strength drives the design.
BVAu-5 vs BVAu-7: 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
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 95 GPa13.8 Msi · Shear Modulus 36 GPa5.2 Msi
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
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 255 J/kg·K0.06 BTU/lb·°F · Latent Heat of Fusion 130 J/g55.9 BTU/lb · Min Service Temperature -269°C-452 °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)
Polishability
Same in both: Castability 80 / 100 · Brazeability / Solderability 97 / 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 | BVAu-5 | BVAu-7 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
BVAu-5 vs BVAu-7 — frequently asked
Is BVAu-7 stronger than BVAu-5?
Yes. BVAu-7 has a typical yield strength of 200 MPa (29 ksi) against 150 MPa (21.8 ksi) for BVAu-5 — about 33% more. Tensile strength is 420 MPa (60.9 ksi) vs 340 MPa (49.3 ksi).
Which is cheaper, BVAu-5 or BVAu-7?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, BVAu-5 or BVAu-7?
BVAu-5, by a small margin. Both rate fair for machinability — 45/100 against 35/100 for BVAu-7; for welding the order is BVAu-5 first (fair, 40/100) then BVAu-7 (poor, 30/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in BVAu-5 and BVAu-7 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.