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AlphaCast208


General Information
Category Gold
Caratage 8-14K
Color White
Color Shade Standart White
Typology Alloys For Gold
Production Process İnvestment Casting
Density [cm3] 11,52
Solidus [°C] 785
Liquidus [°C] 985
As cast hardness [HV] 158
Ingredient
  • Ag
  • Cu
  • Zn
  • Ni
  • Deoxidant
  • Grain Refiner
  • Other
Typical Applications
Open System
Closed System
Sheet Production
General Characteristics
As Cast Grain Size [µm] 350
Color Coordinates
L* 88,09
a* 1,12
b* 10,41
c* 10,47
Mechanical Caracteristics
Tensile Strength (Rm) [MPa] 520
Yields strength (Rp0.2) [MPa] 245
Elongation Rupture (A) [%] 40
As cast Hardness [HV] 158
Hardness after 70% area red. [HV] 280
Hardness after annealing [HV] 165
Hardness after age-hardening [HV] 212
Casting Processing Parameters
Pre-mixing temperature [°C] 1120
Casting Temperatures Metal [°C] Flask [°C]
Thin (below 0.5 mm ) 1090 - 1110 660 - 720
Medium ( from 0.5-1.2 mm) 1070 - 1090 600 - 660
Thick (Thick 1.2 mm) 1040 - 1070 540 - 600
After casting, cooling time for the flaks is 45 minutes.
After casting, cooling time for the flaks is 15 minutes.
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 250 100 Cooling in furnuce
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