Precious Metal Dental Gold Type II
ASTM ADA Spec No.5 Type II · ISO 1562 Type 2
Dental Gold Type II is a medium-hardness high-gold casting alloy to ADA Specification No. 5, Type II, positioned between the soft Type I and the hard Type III.
Reference datasheet — Dental Gold Type II is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the AS-CAST condition
Dental Gold Type II tempers and conditions
Dental Gold Type II is supplied in 3 conditions, soft to hard. AS-CAST is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Softened | Pick when maximum ductility is needed for margin burnishing, adjustment or soldering. | 185 | 350 | 36 | 90 HB | 14 % IACS |
AS-CASTDefault bench-cooled lost-wax casting | Standard condition of a finished inlay/onlay straight from investment casting and devesting. | 200 | 380 | 32 | 100 HB | 15 % IACS |
Hardened | Use where a Type II restoration must carry higher occlusal stress or resist wear at contacts; ductility drops. | 280 | 450 | 18 | 128 HB | 16 % IACS |
What is Dental Gold Type II?
Dental Gold Type II is a medium-hardness high-gold casting alloy to ADA Specification No. 5, Type II, positioned between the soft Type I and the hard Type III. At 200 MPa yield strength, 380 MPa tensile strength, 32% elongation and a 95 GPa elastic modulus it carries moderate-stress inlays and onlays while still allowing margins to be burnished, and it is used as-cast, soft or hard. Oral corrosion resistance is close to inert, so no plating or passivation is needed, but the alloy is soft and gummy to machine and costly against base-metal alternatives. Type III is the choice for crowns and bridges. Dental Gold Type II has a density of 15.6 g/cm³ (0.564 lb/in³), heavier than 79% of precious metal grades. It melts at 910°C (1,670 °F). Dental Gold Type II has a yield strength of 200 MPa (29 ksi) and a tensile strength of 380 MPa (55.1 ksi) — stronger than 51% of precious metal grades. Elongation at break is 32% and the elastic modulus is 95 GPa (13.8 Msi).
What is Dental Gold Type II used for?
- dental inlays
- onlays
- moderate-stress restorations
Advantages
- Easy to machine — 65/100, better than 100% of precious metal grades
- Polishes to a fine finish — 98/100, better than 98% of precious metal grades
- Good corrosion resistance — 97/100, better than 88% of precious metal grades
- Readily welded — 75/100, better than 78% of precious metal grades
- Ductile — tolerates forming and impact — 32%, better than 75% of precious metal grades
Limitations
- High embodied carbon — 13,000 kg CO₂/kg, worse than 81% of precious metal grades
- Heavy — 15.6 g/cm³ (0.564 lb/in³), worse than 79% of precious metal grades
Dental Gold Type II properties
Typical room-temperature values for Dental Gold Type II-AS-CAST; bars are the position among precious metal grades.
Physical3
Dental Gold Type II has a density of 15.6 g/cm³ (0.564 lb/in³), heavier than 79% of precious metal grades. It melts at 910°C (1,670 °F).
Mechanical13
Dental Gold Type II has a yield strength of 200 MPa (29 ksi) and a tensile strength of 380 MPa (55.1 ksi) — stronger than 51% of precious metal grades. Elongation at break is 32% and the elastic modulus is 95 GPa (13.8 Msi).
Thermal6
Dental Gold Type II is rated for continuous service to 400°C (752 °F). It conducts heat at 100 W/m·K (57.8 BTU/hr·ft·°F), better than 55% of precious metal grades. Thermal expansion is 14.5 µm/m·K (8.06 µin/in·°F).
Electrical3
Dental Gold Type II conducts electricity at 15 % IACS, worse than 65% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is excellent (97/100), better than 88% of precious metal grades.
Sustainability4
Producing a kilogram of Dental Gold Type II takes about 190,000 MJ of energy and emits 13,000 kg of CO₂ — more than 81% of precious metal grades. Typical recycled content is 60%.
Manufacturability8
Dental Gold Type II's machinability is good (65/100, better than 100% of precious metal grades); weldability very good (75/100); formability excellent (90/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the precious metal family
Yield strength against density for every precious metal grade FabDigit runs. Dental Gold Type II is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Dental Gold Type II
Is Dental Gold Type II easy to machine?
Very soft and gummy — use sharp carbide or diamond tooling, high speed, light feed and collect all swarf for refining.
Can Dental Gold Type II be welded?
Laser welds cleanly without filler; torch soldering with matched dental gold solders below the solidus is routine.
Can Dental Gold Type II be formed, bent or molded?
Excellent lost-wax investment castability with gypsum-bonded investment; margins are readily burnished and cold worked in the soft condition.
Dental Gold Type II chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| AuAu + Pt-group ≥ 78 % for ADA Type II | 72 – 80 | 75.5 |
| Ag | 8 – 15 | 12 |
| Pd | 0 – 3 | 1.5 |
| Pt | 0 – 4 | 1 |
| Zndeoxidiser, improves castability | 0 – 2 | 1 |
| Irgrain refiner, optional | 0 – 0.01 | 0.01 |
| Cubalance, controls age-hardening | ≥ 5 (balance) |
What surface finishes work on Dental Gold Type II?
Polishes to a permanent mirror finish with rouge; no plating, passivation or anodising needed.
Equivalent designations
Standards and trade names that resolve to Precious Metal Dental Gold Type II in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- ADA Spec No.5 Type II
- ISO
- 1562 Type 2
How much does Dental Gold Type II cost?
Dental Gold Type II is a high-cost precious metal ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Dental Gold Type II — frequently asked
What is Dental Gold Type II used for?
Dental Gold Type II is typically used for dental inlays, onlays and moderate-stress restorations. In short: mid-hardness dental gold; near-inert in oral service; castable and burnishable.
What is the yield strength of Dental Gold Type II?
Dental Gold Type II has a typical yield strength of 200 MPa (29 ksi) and a tensile strength of 380 MPa (55.1 ksi) — stronger than 51% of precious metal grades. Strength varies by condition: see the 3 listed tempers.
Is Dental Gold Type II easy to machine?
Reasonably — machinability is rated good (65/100, better than 100% of precious metal grades). Very soft and gummy — use sharp carbide or diamond tooling, high speed, light feed and collect all swarf for refining.
Can Dental Gold Type II be welded?
Yes — weldability is rated very good (75/100). Laser welds cleanly without filler; torch soldering with matched dental gold solders below the solidus is routine.
What surface finishes work on Dental Gold Type II?
Polishes to a permanent mirror finish with rouge; no plating, passivation or anodising needed.
Can Dental Gold Type II be formed, bent or molded?
Excellent lost-wax investment castability with gypsum-bonded investment; margins are readily burnished and cold worked in the soft condition.
What is the maximum service temperature of Dental Gold Type II?
Dental Gold Type II is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Dental Gold Type II AS-CAST and Dental Gold Type II Hard?
AS-CAST is the default condition — standard condition of a finished inlay/onlay straight from investment casting and devesting. Hard: use where a Type II restoration must carry higher occlusal stress or resist wear at contacts; ductility drops. Yield strength is 200 MPa in AS-CAST versus 280 MPa in Hard.
How much does Dental Gold Type II cost?
Dental Gold Type II is a high-cost precious metal ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ISO 1562 Dentistry — Casting gold alloys — ISO (2004)
- ANSI/ADA Specification No. 5 — Dental Casting Alloys — American Dental Association (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys (Precious Metals) — ASM International (1990)
- Phillips' Science of Dental Materials — Elsevier (2012)
- Dental casting gold alloy datasheets (Type II, ~75 % Au) — Precious-metal dental alloy producers (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.