Precious Metal 18K Rose Gold H08-H vs 18K Rose Gold-O
Precious Metal · 18K Rose Gold temper comparison
18K Rose Gold H08-H and 18K Rose Gold-O are two conditions of the same precious metal grade, 18K Rose Gold: H08-H (hard / spring) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. 18K Rose Gold H08-H is the stronger of the two: yield strength 730 MPa (106 ksi) against 210 MPa (30.5 ksi) for 18K Rose Gold-O, about 3.5 times as much; tensile strength follows at 820 MPa (119 ksi) vs 460 MPa (66.7 ksi). In exchange, 18K Rose Gold-O is the more ductile: elongation 32% versus 4% for 18K Rose Gold H08-H, and 18K Rose Gold H08-H is harder (204 HB vs 143 HB). 18K Rose Gold-O runs hotter in service (300°C vs 150°C continuous). On the shop floor, 18K Rose Gold H08-H machines more easily (very good vs good) and 18K Rose Gold-O welds better (good vs fair).
18K Rose Gold H08-HChoose it when strength drives the design, or when the part is machined in volume.
18K Rose Gold-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
18K Rose Gold H08-H vs 18K Rose Gold-O: 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 Rose Gold H08-H18K Rose Gold-O
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 32 GPa4.6 Msi · Bulk Modulus 125 GPa18.1 Msi · Poisson's Ratio 0.37 · Charpy V-Notch Impact (RT) 35 J25.8 ft·lbf
Physical
Density and transition temperatures.
Same in both: Density 15.3 g/cm³0.55 lb/in³ · Melting Point (Solidus) 890°C1,634 °F · Liquidus Temperature 905°C1,661 °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 195 J/kg·K0.05 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16 µm/m·K8.9 µin/in·°F · Latent Heat of Fusion 95 J/g40.8 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)
Same in both: Castability 78 / 100 · Brazeability / Solderability 88 / 100 · Polishability 92 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 180,000 MJ/kg7.74×10⁷ BTU/lb · Embodied Carbon (primary production) 13,000 kg CO₂/kg · Embodied Water 200,000 L/kg23,965 gal/lb · Typical Recycled Content 40%
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 Rose Gold H08-H vs 18K Rose Gold-O — frequently asked
Is 18K Rose Gold H08-H stronger than 18K Rose Gold-O?
Yes. 18K Rose Gold H08-H has a typical yield strength of 730 MPa (106 ksi) against 210 MPa (30.5 ksi) for 18K Rose Gold-O — about 3.5 times as much. Tensile strength is 820 MPa (119 ksi) vs 460 MPa (66.7 ksi).
Which condition does FabDigit quote by default, H08-H or O?
O is the default 18K Rose Gold 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, 18K Rose Gold H08-H or 18K Rose Gold-O?
18K Rose Gold H08-H. Its machinability rates very good (70/100) against good (58/100) for 18K Rose Gold-O; for welding the order is 18K Rose Gold-O first (good, 62/100) then 18K Rose Gold H08-H (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 18K Rose Gold H08-H and 18K Rose Gold-O 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.