Precious Metal 22K vs Dental Gold Type IV
Precious Metal · grade comparison
Precious Metal 22K and Dental Gold Type IV are both precious metal grades. Dental Gold Type IV is the stronger of the two: yield strength 570 MPa (82.7 ksi) against 75 MPa (10.9 ksi) for 22K, about 7.6 times as much; tensile strength follows at 750 MPa (109 ksi) vs 220 MPa (31.9 ksi). In exchange, 22K is the more ductile: elongation 35% versus 6% for Dental Gold Type IV, and Dental Gold Type IV is harder (240 HB vs 52 HB). Dental Gold Type IV is lighter (15.5 g/cm³ vs 17.8 g/cm³ for 22K) and Dental Gold Type IV is stiffer (95 GPa vs 78 GPa). On the shop floor, 22K welds better (excellent vs good).
22KChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Dental Gold Type IVChoose it when strength drives the design, or when weight is the constraint.
22K vs Dental Gold Type IV: 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
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Vickers
Compressive Strength
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Rockwell B
Hardness, Rockwell C
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Same in both: Machinability Rating (AISI 1212 = 100 %) 45%
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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.
Manufacturing and finishing
| Capability | 22K | Dental Gold Type IV |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
22K vs Dental Gold Type IV — frequently asked
Is Dental Gold Type IV stronger than 22K?
Yes. Dental Gold Type IV has a typical yield strength of 570 MPa (82.7 ksi) against 75 MPa (10.9 ksi) for 22K — about 7.6 times as much. Tensile strength is 750 MPa (109 ksi) vs 220 MPa (31.9 ksi).
Which is cheaper, 22K or Dental Gold Type IV?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, 22K or Dental Gold Type IV?
Dental Gold Type IV. Its machinability rates good (55/100) against fair (50/100) for 22K; for welding the order is 22K first (excellent, 85/100) then Dental Gold Type IV (good, 60/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 22K and Dental Gold Type IV 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.