Precious Metal 18K Rose Gold-AH vs 18K Rose Gold-O
Precious Metal · 18K Rose Gold temper comparison
18K Rose Gold-AH and 18K Rose Gold-O are two conditions of the same precious metal grade, 18K Rose Gold: AH (age (order) hardened) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. 18K Rose Gold-AH is the stronger of the two: yield strength 850 MPa (123 ksi) against 210 MPa (30.5 ksi) for 18K Rose Gold-O, about 4.0 times as much; tensile strength follows at 980 MPa (142 ksi) vs 460 MPa (66.7 ksi). In exchange, 18K Rose Gold-O is the more ductile: elongation 32% versus 5% for 18K Rose Gold-AH, and 18K Rose Gold-AH is harder (270 HB vs 143 HB). 18K Rose Gold-AH is stiffer (95 GPa vs 88 GPa). On the shop floor, 18K Rose Gold-AH machines more easily (very good vs good).
18K Rose Gold-AHChoose 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.
18K Rose Gold-AH 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-AH18K 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
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Same in both: Shear Modulus 32 GPa4.6 Msi · Bulk Modulus 125 GPa18.1 Msi · Poisson's Ratio 0.37 · Reduction in Area 50% · Shear Strength 300 MPa43.5 ksi · Charpy V-Notch Impact (RT) 35 J25.8 ft·lbf · Hardness, Rockwell B 80 HRB
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.
Same in both: Thermal Conductivity 130 W/m·K75.1 BTU/hr·ft·°F · 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 · Max Service Temperature (continuous) 300°C572 °F · Min Service Temperature -200°C-328 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 19 % IACS · Electrical Resistivity 9×10⁻⁸ Ω·m3.54 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) 0.2 V · Corrosion Resistance 78 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Polishability
Same in both: Machinability Rating (AISI 1212 = 100 %) 55% · Weldability 62 / 100 · Castability 78 / 100 · Brazeability / Solderability 88 / 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-AH vs 18K Rose Gold-O — frequently asked
Is 18K Rose Gold-AH stronger than 18K Rose Gold-O?
Yes. 18K Rose Gold-AH has a typical yield strength of 850 MPa (123 ksi) against 210 MPa (30.5 ksi) for 18K Rose Gold-O — about 4.0 times as much. Tensile strength is 980 MPa (142 ksi) vs 460 MPa (66.7 ksi).
Which condition does FabDigit quote by default, AH 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-AH or 18K Rose Gold-O?
18K Rose Gold-AH. Its machinability rates very good (72/100) against good (58/100) for 18K Rose Gold-O.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 18K Rose Gold-AH 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.