Precious Metal Dental Gold Type I-AC vs Dental Gold Type I-CW
Precious Metal · Dental Gold Type I temper comparison
Dental Gold Type I-AC and Dental Gold Type I-CW are two conditions of the same precious metal grade, Dental Gold Type I: AC (spheroidize annealed) versus CW (cold worked). The chemistry is identical, so every difference below comes from the condition. Dental Gold Type I-CW is the stronger of the two: yield strength 180 MPa (26.1 ksi) against 90 MPa (13.1 ksi) for Dental Gold Type I-AC, about 100% more; tensile strength follows at 300 MPa (43.5 ksi) vs 250 MPa (36.3 ksi). In exchange, Dental Gold Type I-AC is the more ductile: elongation 30% versus 8% for Dental Gold Type I-CW, and Dental Gold Type I-CW is harder (90 HB vs 60 HB). Dental Gold Type I-AC runs hotter in service (300°C vs 200°C continuous). On the shop floor, Dental Gold Type I-CW machines more easily (50 vs 40 out of 100).
Dental Gold Type I-ACChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Dental Gold Type I-CWChoose it when strength drives the design, or when the part is machined in volume.
Dental Gold Type I-AC vs Dental Gold Type I-CW: 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.
Dental Gold Type I-ACDental Gold Type I-CW
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 85 GPa12.3 Msi · Shear Modulus 31 GPa4.5 Msi · Bulk Modulus 145 GPa21 Msi · Poisson's Ratio 0.37
Physical
Density and transition temperatures.
Same in both: Density 17.2 g/cm³0.62 lb/in³ · Melting Point (Solidus) 935°C1,715 °F · Liquidus Temperature 960°C1,760 °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 150 J/kg·K0.04 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16 µm/m·K8.9 µin/in·°F · Latent Heat of Fusion 68 J/g29.2 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) 0.28 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 96 / 100 · Brazeability / Solderability 95 / 100 · Polishability 98 / 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) 13,000 kg CO₂/kg · Embodied Water 250,000 L/kg29,957 gal/lb · Typical Recycled Content 60%
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.
Dental Gold Type I-AC vs Dental Gold Type I-CW — frequently asked
Is Dental Gold Type I-CW stronger than Dental Gold Type I-AC?
Yes. Dental Gold Type I-CW has a typical yield strength of 180 MPa (26.1 ksi) against 90 MPa (13.1 ksi) for Dental Gold Type I-AC — about 100% more. Tensile strength is 300 MPa (43.5 ksi) vs 250 MPa (36.3 ksi).
Which condition does FabDigit quote by default, AC or CW?
AC is the default Dental Gold Type I 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, Dental Gold Type I-AC or Dental Gold Type I-CW?
Dental Gold Type I-CW, by a small margin. Both rate fair for machinability — 50/100 against 40/100 for Dental Gold Type I-AC; for welding the order is Dental Gold Type I-AC first (good, 60/100) then Dental Gold Type I-CW (good, 55/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Dental Gold Type I-AC and Dental Gold Type I-CW 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.