Precious Metal 18K White Gold Cast vs 18K White Gold-H
Precious Metal · 18K White Gold temper comparison
18K White Gold Cast and 18K White Gold-H are two conditions of the same precious metal grade, 18K White Gold: Cast (as cast) versus H (hardened). The chemistry is identical, so every difference below comes from the condition. 18K White Gold-H is the stronger of the two: yield strength 700 MPa (102 ksi) against 290 MPa (42.1 ksi) for 18K White Gold Cast, about 141% more; tensile strength follows at 830 MPa (120 ksi) vs 480 MPa (69.6 ksi). In exchange, 18K White Gold Cast is the more ductile: elongation 18% versus 3% for 18K White Gold-H, and 18K White Gold-H is harder (218 HB vs 138 HB). 18K White Gold Cast runs hotter in service (400°C vs 150°C continuous). On the shop floor, 18K White Gold-H machines more easily (very good vs good).
18K White Gold CastChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
18K White Gold-HChoose it when strength drives the design, or when the part is machined in volume.
18K White Gold Cast vs 18K White Gold-H: 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.
18K White Gold Cast18K White Gold-H
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 36 GPa5.2 Msi · Bulk Modulus 145 GPa21 Msi · Poisson's Ratio 0.38
Physical
Density and transition temperatures.
Same in both: Density 15.8 g/cm³0.57 lb/in³ · Melting Point (Solidus) 1,130°C2,066 °F · Liquidus Temperature 1,200°C2,192 °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 155 J/kg·K0.04 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 14.5 µm/m·K8.1 µin/in·°F · Latent Heat of Fusion 70 J/g30.1 BTU/lb · Min Service Temperature -200°C-328 °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) 0.2 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Polishability
Same in both: Castability 72 / 100 · Brazeability / Solderability 90 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 190,000 MJ/kg8.17×10⁷ BTU/lb · Embodied Carbon (primary production) 12,000 kg CO₂/kg · Embodied Water 200,000 L/kg23,965 gal/lb · Typical Recycled Content 35%
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.
18K White Gold Cast vs 18K White Gold-H — frequently asked
Is 18K White Gold-H stronger than 18K White Gold Cast?
Yes. 18K White Gold-H has a typical yield strength of 700 MPa (102 ksi) against 290 MPa (42.1 ksi) for 18K White Gold Cast — about 141% more. Tensile strength is 830 MPa (120 ksi) vs 480 MPa (69.6 ksi).
Which condition does FabDigit quote by default, Cast or H?
Annealed is the default 18K White Gold condition in the FabDigit quote flow (neither Cast nor H). 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, 18K White Gold Cast or 18K White Gold-H?
18K White Gold-H. Its machinability rates very good (70/100) against good (60/100) for 18K White Gold Cast; for welding the order is 18K White Gold Cast first (good, 68/100) then 18K White Gold-H (good, 60/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 18K White Gold Cast and 18K White Gold-H 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.