| SCA5
| Title 14 Kt |
Master alloy for casting of 375-585‰(9-14 Kt) yellow gold |
GENERAL INFORMATION
| Typology |
Master alloy for gold |
| Production process |
Casting |
| Color |
Yellow |
| Color shade |
Light yellow |
| Density[g/cm3] |
12.8 |
| Melting temperatures |
|
| Solidus[℃] |
800 |
| Liquidus[℃] |
855 |
| Commercial composition |
|
| Ag(%) |
18 |
| Cu(%) |
64 |
| Zn(%) |
18 |
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FULL CHARACTERIZATION DATA
| General characteristics |
|
| As cast grain size[μm] |
720 |
| Fluidity(grid filling test)[%] |
91 |
| Color coordinates |
|
| L* |
87.1 |
| a* |
1.9 |
| b* |
18.2 |
| c* |
8.3 |
| Mechanical characteristics |
|
| Tensile strength (Rm) [MPa] |
467 |
| Yield strength (Rp0.2) [MPa] |
268 |
| Elongation at rupture(A)[%] |
38 |
| As cast hardness[HV0.2] |
125 |
| Hardness after 70% area red.[HV0.2] |
275 |
| Hardness after annealing[HV0.2] |
135 |
| Single step age-hardening hardness[HV0.2] |
170 |
PRODUCT APPLICATIONS
| Casting in open systems |
| Casting in closed systems |
| Casting without stones |
| Stone-in-place casting |
| Age-hardening |
RELATED PRODUCTS
| C141US |
Lower silver content, casting in closed systems |
| C14GR |
Higher level of grain refiners |
| LSG409 |
Medium/soft solder for 585% yellow gold |
| LSG409D |
Medium solder for 585% yellow gold |
| LSG417F |
Medium solder for 375% yellow gold |
| LSG419 |
Extra soft solder for 375% yellow gold |
| TECHNICAL DATASHEET AND GUIDELINE |
|
| SCA5 |
|
| Title 14 Kt |
Master alloy for casting of 375-585% (9-14 Kt) yellow gold |
CASTING PROCESSING PARAMETERS
| Casting temperatures |
Metal- from [℃] |
Metal- to [℃] |
Flask- from [℃] |
Flask- to [℃] |
| Thin(below0.5mm) |
955 |
985 |
660 |
720 |
| Medium(from0.5to1.2mm) |
935 |
955 |
580 |
650 |
| Thick(above1.2mm) |
915 |
935 |
460 |
600 |
| Stone-in-place casting treesRemove the flask from the chamber immediately(<1min)after pouring.Let it cool for 25 minutes in air,then quench in water.Trees without stonesLet the flask cool down for10-15 minutes,then quench in water.PicklingDip inRADIAL solution(50g/lconc.at60℃for2min.),or in sulphuric acid(10%conc.at50℃for5min.) |
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\mathsf{F l a s k-\ t o},[\circ^{\circ}\mathsf{C}]
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60^{\circ}\mathrm{C}
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50^{\circ}\mathbf{C}
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AGE HARDENING PROCESSING PARAMETERS
| Single step age-hardening treatment |
Temperature[℃] |
Time[min] |
Quenching |
| Age-hardening |
250 |
90 |
Air or in furnace |