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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] 12,7
Solidus [°C] 860
Liquidus [°C] 945
As cast hardness [HV] 183
Ingredient
  • Ag
  • Cu
  • Zn
  • Ni
  • Deoxidant
  • Grain Refiner
  • Other
Typical Applications
Open System
Closed System
Sheet Production
General Characteristics
As Cast Grain Size [µm] 200
Color Coordinates
L* 87,25
a* 1,63
b* 11,82
c* 11,91
Mechanical Caracteristics
Tensile Strength (Rm) [MPa] 490
Yields strength (Rp0.2) [MPa] 335
Elongation Rupture (A) [%] 41
As cast Hardness [HV] 183
Hardness after 70% area red. [HV] 269
Hardness after annealing [HV] 188
Hardness after age-hardening [HV] 250
Casting Processing Parameters
Pre-mixing temperature [°C] 1120
Casting Temperatures Metal [°C] Flask [°C]
Thin (below 0.5 mm ) 1030 - 1070 660 - 720
Medium ( from 0.5-1.2 mm) 1010 - 1030 620 - 660
Thick (Thick 1.2 mm) 990 - 1010 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 300 100 Cooling in furnuce
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