Precious Metal AuNi Cast vs AuNi-H02
Precious Metal · AuNi temper comparison
AuNi Cast and AuNi-H02 are two conditions of the same precious metal grade, AuNi: Cast (as cast) versus H02 (half hard). The chemistry is identical, so every difference below comes from the condition. AuNi-H02 is the stronger of the two: yield strength 480 MPa (69.6 ksi) against 150 MPa (21.8 ksi) for AuNi Cast, about 3.2 times as much; tensile strength follows at 590 MPa (85.6 ksi) vs 350 MPa (50.8 ksi). In exchange, AuNi Cast is the more ductile: elongation 20% versus 8% for AuNi-H02, and AuNi-H02 is harder (180 HV vs 110 HV). AuNi Cast runs hotter in service (400°C vs 350°C continuous). On the shop floor, AuNi-H02 machines more easily (52 vs 40 out of 100).
AuNi CastChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
AuNi-H02Choose it when strength drives the design, or when the part is machined in volume.
AuNi Cast vs AuNi-H02: 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Vickers
Same in both: Shear Modulus 35 GPa5.1 Msi · Bulk Modulus 175 GPa25.4 Msi · Poisson's Ratio 0.41
Physical
Density and transition temperatures.
Same in both: Density 18.3 g/cm³0.66 lb/in³ · Melting Point (Solidus) 955°C1,751 °F · Liquidus Temperature 975°C1,787 °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 145 J/kg·K0.03 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 14.2 µm/m·K7.9 µin/in·°F · Latent Heat of Fusion 75 J/g32.2 BTU/lb · Min Service Temperature -250°C-418 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) 0.25 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 70 / 100 · Brazeability / Solderability 90 / 100 · Polishability 95 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 240,000 MJ/kg1.03×10⁸ BTU/lb · Embodied Carbon (primary production) 24,000 kg CO₂/kg · Embodied Water 200,000 L/kg23,965 gal/lb · Typical Recycled Content 30%
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.
AuNi Cast vs AuNi-H02 — frequently asked
Is AuNi-H02 stronger than AuNi Cast?
Yes. AuNi-H02 has a typical yield strength of 480 MPa (69.6 ksi) against 150 MPa (21.8 ksi) for AuNi Cast — about 3.2 times as much. Tensile strength is 590 MPa (85.6 ksi) vs 350 MPa (50.8 ksi).
Which condition does FabDigit quote by default, Cast or H02?
H04 is the default AuNi condition in the FabDigit quote flow (neither Cast nor H02). 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, AuNi Cast or AuNi-H02?
AuNi-H02, by a small margin. Both rate fair for machinability — 52/100 against 40/100 for AuNi Cast; for welding the order is AuNi Cast first (very good, 78/100) then AuNi-H02 (very good, 72/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in AuNi Cast and AuNi-H02 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.