Precious Metal BVAu-8-ANN vs BVAu-8 Hard
Precious Metal · BVAu-8 temper comparison
BVAu-8-ANN and BVAu-8 Hard are two conditions of the same precious metal grade, BVAu-8: ANN (annealed) versus Hard (cold worked). The chemistry is identical, so every difference below comes from the condition. BVAu-8 Hard is the stronger of the two: yield strength 380 MPa (55.1 ksi) against 100 MPa (14.5 ksi) for BVAu-8-ANN, about 3.8 times as much; tensile strength follows at 450 MPa (65.3 ksi) vs 250 MPa (36.3 ksi). In exchange, BVAu-8-ANN is the more ductile: elongation 30% versus 3% for BVAu-8 Hard, and BVAu-8 Hard is harder (124 HB vs 58 HB). BVAu-8-ANN runs hotter in service (800°C vs 200°C continuous). On the shop floor, BVAu-8 Hard machines more easily (fair vs poor).
BVAu-8-ANNChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
BVAu-8 HardChoose it when strength drives the design, or when the part is machined in volume.
BVAu-8-ANN vs BVAu-8 Hard: 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.
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: Elastic (Young's) Modulus 90 GPa13.1 Msi · Shear Modulus 31 GPa4.5 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.42
Physical
Density and transition temperatures.
Same in both: Density 17.85 g/cm³0.64 lb/in³ · Melting Point (Solidus) 995°C1,823 °F · Liquidus Temperature 1,015°C1,859 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 138 J/kg·K0.03 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 15 µm/m·K8.3 µin/in·°F · Latent Heat of Fusion 70 J/g30.1 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).
Same in both: Galvanic Potential (seawater, vs SCE) 0.25 V · Corrosion Resistance 95 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Castability 80 / 100 · Brazeability / Solderability 100 / 100 · Polishability 90 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 230,000 MJ/kg9.89×10⁷ BTU/lb · Embodied Carbon (primary production) 15,000 kg CO₂/kg · Embodied Water 140,000 L/kg16,776 gal/lb · Typical Recycled Content 70%
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.
BVAu-8-ANN vs BVAu-8 Hard — frequently asked
Is BVAu-8 Hard stronger than BVAu-8-ANN?
Yes. BVAu-8 Hard has a typical yield strength of 380 MPa (55.1 ksi) against 100 MPa (14.5 ksi) for BVAu-8-ANN — about 3.8 times as much. Tensile strength is 450 MPa (65.3 ksi) vs 250 MPa (36.3 ksi).
Which condition does FabDigit quote by default, ANN or Hard?
ANN is the default BVAu-8 condition in the FabDigit quote flow. The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which is easier to machine, BVAu-8-ANN or BVAu-8 Hard?
BVAu-8 Hard. Its machinability rates fair (45/100) against poor (30/100) for BVAu-8-ANN.
Ready to make it?
Upload a CAD file and FabDigit prices the part in BVAu-8-ANN and BVAu-8 Hard 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.