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AlphaCast259


General Information
Category Gold
Caratage 18K
Color White
Color Shade Premium White
Typology Alloys For Gold
Production Process İnvestment Casting
Density [cm3] 14,6
Solidus [°C] 925
Liquidus [°C] 955
As cast hardness [HV] 200
Ingredient
  • Ag
  • Cu
  • Zn
  • Ni
  • Deoxidant
  • Grain Refiner
  • Other
Typical Applications
General Characteristics
As Cast Grain Size [µm] 150
Color Coordinates
L* 86,4
a* 1,1
b* 8,3
c* 8,4
Mechanical Caracteristics
Tensile Strength (Rm) [MPa] 550
Yields strength (Rp0.2) [MPa] 410
Elongation Rupture (A) [%] 30
As cast Hardness [HV] 200
Hardness after 70% area red. [HV] 300
Hardness after annealing [HV] 220
Hardness after age-hardening [HV] 200
Casting Processing Parameters
Pre-mixing temperature [°C] 1120
Casting Temperatures Metal [°C] Flask [°C]
Thin (below 0.5 mm ) 1080 - 1060 660 - 720
Medium ( from 0.5-1.2 mm) 1060 - 1030 620 - 660
Thick (Thick 1.2 mm) 1030 - 1000 540 - 620
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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