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AlphaUni317
8
9
10
14
18
General Information
Category
Gold
Caratage
8-18K
Color
Red
Color Shade
Rose
Typology
Alloys For Gold
Production Process
General
Density [cm
3
]
13,10
Solidus [°C]
860
Liquidus [°C]
920
As cast hardness [HV]
148
Ingredient
Ag
Cu
Zn
Ni
Deoxidant
Grain Refiner
Other
Typical Applications
Open System
Closed System
Press
CNC and Lathe Production
Handmade
Hollow Chain
Machine Chain
Wire Production
Production of tube from continuous casting
Sheet Production
Hollow chain Production
General Characteristics
As Cast Grain Size [µm]
Color Coordinates
L*
a*
b*
c*
Mechanical Caracteristics
Tensile Strength (Rm) [MPa]
665
Yields strength (Rp0.2) [MPa]
Elongation Rupture (A) [%]
32
As cast Hardness [HV]
148
Hardness after 70% area red. [HV]
Hardness after annealing [HV]
Hardness after age-hardening [HV]
170
Casting Processing Parameters
Pre-mixing temperature [°C]
1100
Casting Temperatures
Metal [°C]
Flask [°C]
Thin (below 0.5 mm )
1060
-
1090
650
-
680
Medium ( from 0.5-1.2 mm)
1030
-
1060
600
-
650
Thick (Thick 1.2 mm)
1000
-
1030
550
-
600
Trees without stones
Stone-in-place casting trees
Pickling :
Mechanical Working Parameters
Pre-mixing temperature [°C]
1060-1100
Pickling
Sulphuric Acid (%10)
Casting Temperature
Metal - from [°C]
Metal - to [°C]
Ingot Making
1060
1100
Continuous Casting
1080
1140
Reccomended reductions
Sheet - area or thickness [%]
65
Wire - diameter [%]
45
Mechanical working recommended annealing
Temperature [°C]
Time [min]
> 5 mm
630
-
670
40
1 - 5 mm
630
-
670
30
< 1 mm
630
-
670
20
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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