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AlphaCast308
10
14
General Information
Category
Gold
Caratage
10-14K
Color
Red
Color Shade
Russian Red
Typology
Alloys For Gold
Production Process
General
Density [cm
3
]
13.05
Solidus [°C]
845
Liquidus [°C]
895
As cast hardness [HV]
165
Ingredient
Ag
Cu
Zn
Ni
Deoxidant
Grain Refiner
Other
Typical Applications
Open System
Closed System
Sheet Production
General Characteristics
As Cast Grain Size [µm]
700
Color Coordinates
L*
83.9
a*
7.1
b*
15.4
c*
16.96
Mechanical Caracteristics
Tensile Strength (Rm) [MPa]
485
Yields strength (Rp0.2) [MPa]
285
Elongation Rupture (A) [%]
35
As cast Hardness [HV]
165
Hardness after 70% area red. [HV]
290
Hardness after annealing [HV]
155
Hardness after age-hardening [HV]
180
Casting Processing Parameters
Pre-mixing temperature [°C]
1080
Casting Temperatures
Metal [°C]
Flask [°C]
Thin (below 0.5 mm )
1010
-
1040
660
-
720
Medium ( from 0.5-1.2 mm)
990
-
1010
600
-
660
Thick (Thick 1.2 mm)
970
-
990
540
-
600
Trees without stones
After casting, cooling time for the flaks is 15 m
Stone-in-place casting trees
After casting, cooling time for the flaks is 45 m
Pickling :
Sülfürik asit (%10) - 5 dk. - 50°C
Age Hardening Processing Parameters
Single step age-hardening treatment
Temperature [°C]
Time [min]
Quenching
Age-hardening
Age-hardening
300
100
Cooling in furnuce
12
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