Precious Metal BAu-4 vs BVAu-4
Precious Metal · grade comparison
Precious Metal BAu-4 and BVAu-4 are both precious metal grades. BVAu-4 is the stronger of the two: yield strength 260 MPa (37.7 ksi) against 210 MPa (30.5 ksi) for BAu-4, about 24% more; tensile strength follows at 400 MPa (58 ksi) vs 340 MPa (49.3 ksi). In exchange, BAu-4 is the more ductile: elongation 25% versus 10% for BVAu-4, and BAu-4 is harder (150 HV vs 130 HV). BVAu-4 is stiffer (115 GPa vs 105 GPa) and BAu-4 conducts heat better (60 W/m·K vs 25 W/m·K).
BAu-4Choose it when the part is bent, formed or impact-loaded.
BVAu-4Choose it when strength drives the design.
BAu-4 vs BVAu-4: 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
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Hardness, Vickers
Physical
Density and transition temperatures.
Same in both: Density 15.9 g/cm³0.57 lb/in³ · Melting Point (Solidus) 950°C1,742 °F · Liquidus Temperature 950°C1,742 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Latent Heat of Fusion
Same in both: Thermal Expansion (CTE, 20–100 °C) 15.5 µm/m·K8.6 µin/in·°F · Max Service Temperature (continuous) 800°C1,472 °F · Min Service Temperature -269°C-452 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Galvanic Potential (seawater, vs SCE)
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Brazeability / Solderability
Same in both: Machinability 35 / 100 · Weldability 40 / 100 · Formability (cold) 75 / 100 · Castability 80 / 100 · Polishability 85 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Water 200,000 L/kg23,965 gal/lb
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 | BAu-4 | BVAu-4 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
BAu-4 vs BVAu-4 — frequently asked
Is BVAu-4 stronger than BAu-4?
Yes. BVAu-4 has a typical yield strength of 260 MPa (37.7 ksi) against 210 MPa (30.5 ksi) for BAu-4 — about 24% more. Tensile strength is 400 MPa (58 ksi) vs 340 MPa (49.3 ksi).
Which is cheaper, BAu-4 or BVAu-4?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose BAu-4 over BVAu-4?
Pick BAu-4 when the part is bent, formed or impact-loaded. Pick BVAu-4 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in BAu-4 and BVAu-4 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.