Jewelry Precious Metal · Gold Alloy
Precious Metal Gold 18K
Precious Metal Gold 18K is a jewelry precious metal precious metal — premium 18k jewelry gold. Typical values: 110 MPa yield, 15.6 g/cm³, rated to 600 °C. Available for CNC machining, Sheet metal at FabDigit.
Properties
Typical room-temperature values in the O (annealed) condition. Metric first, imperial in gray. The bars show where Gold 18K sits against the other 7 precious metal grades in the catalog.
Datasheet
| Yield strength | 110 MPa16 ksi |
|---|---|
| Tensile strength | 380 MPa55 ksi |
| Hardness | 140 HV≈ 133 HB |
| Density | 15.6 g/cm³0.564 lb/in³ |
| Specific strength (yield ÷ density) | 7 |
| Min service temp | -200 °C-328 °F |
| Max service temp | 600 °C1,112 °F |
| Electrical conductivity | 22 % IACS12.8 MS/m |
| Machinability | Good60 / 100 |
| Weldability | Excellent92 / 100 |
| Formability | Excellent92 / 100 |
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Against other precious metal grades
Strength versus weight in the precious metal family
Yield strength against density for every precious metal grade FabDigit runs. Gold 18K is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to Gold 18K. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Good60 / 100 |
|---|---|
| Cutting speed (rough / finish) | — / — |
| Minimum wall | — |
| Minimum internal radius | — |
| Drill depth limit | — |
| Best surface (machined / polished) | Ra — / — |
| Hardenable after machining | — |
Sheet metal
| Formability | Excellent92 / 100 |
|---|---|
| Weldability | Excellent92 / 100 |
| Bendable | Yes |
Conditions and tempers
How Gold 18K is supplied and what each state is for. The default is what FabDigit quotes unless your drawing says otherwise.
| Condition | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
ODefault Annealed (O) | Softest — parts you will bend or deep-form; not for carrying load | — | — | — | — |
Cold Worked Cold Work | Strengthened by cold working — general strengthened stock | — | — | — | — |
Stress Relieved Heat Treat State | Holds tight flatness/tolerance through heavy machining | — | — | — | — |
Heat treatment and post-processing
Operations FabDigit's suppliers routinely run on Gold 18K, ranked by how often they make sense for this grade.
Post-processing
| Manual Deburr | Deburrstandard |
|---|---|
| Edge Break (0.5mm) | Deburr |
| CMM Inspection | Inspection |
| FAI Report | Inspection |
| Individual Bag | Packaging |
Surface finishes for Gold 18K
Coatings and treatments compatible with precious metal on the processes Gold 18K runs on. Pick them in the quote configurator or call them out on the drawing.
Marking / Decoration
- Chemical Etching
- Dot Peen Marking
- Electro-chemical Etching
- Embossing / Debossing
- Ink Stamping
- Laser Marking
- Mechanical Engraving
- Steel Stamping
- Vibro Engraving / Scribing
Equivalent designations
Standards and trade names that resolve to Precious Metal Gold 18K in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Other
- 18K GoldAu 75018K Yellow Gold
Stock forms
Raw-material forms FabDigit sources Gold 18K in.
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.