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AlphaCast101
8
9
10
14
18
General Information
Category
Gold
Caratage
8-18K
Color
Yellow
Color Shade
Deep Yellow
Typology
Alloys For Gold
Production Process
İnvestment Casting
Density [cm
3
]
10,8
Solidus [°C]
859
Liquidus [°C]
904
As cast hardness [HV]
90
Ingredient
Ag
Cu
Zn
Ni
Deoxidant
Grain Refiner
Other
Typical Applications
Open System
Closed System
Sheet Production
General Characteristics
As Cast Grain Size [µm]
887
Color Coordinates
L*
86,3
a*
0,8
b*
19,1
c*
19,1
Mechanical Caracteristics
Tensile Strength (Rm) [MPa]
425
Yields strength (Rp0.2) [MPa]
200
Elongation Rupture (A) [%]
40
As cast Hardness [HV]
90
Hardness after 70% area red. [HV]
259
Hardness after annealing [HV]
111
Hardness after age-hardening [HV]
100
Casting Processing Parameters
Pre-mixing temperature [°C]
1050
Casting Temperatures
Metal [°C]
Flask [°C]
Thin (below 0.5 mm )
1000
-
1050
660
-
700
Medium ( from 0.5-1.2 mm)
980
-
1000
620
-
660
Thick (Thick 1.2 mm)
950
-
980
580
-
620
Trees without stones
After casting, cooling time for the flaks is 45 minutes.
Stone-in-place casting trees
After casting, cooling time for the flaks is 15 minutes.
Pickling :
Sulphuric acid (%10) - 5 min - 50°C
Age Hardening Processing Parameters
Single step age-hardening treatment
Temperature [°C]
Time [min]
Quenching
Age-hardening
Age-hardening
275
100
Cooling in furnuce
12
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