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AlphaCast184


General Information
Category Gold
Caratage 18K
Color Yellow
Color Shade Pale Yellow
Typology Alloys For Gold
Production Process İnvestment Casting
Density [cm3] 15,50
Solidus [°C] 870
Liquidus [°C] 925
As cast hardness [HV] 120
Ingredient
  • Ag
  • Cu
  • Zn
  • Ni
  • Deoxidant
  • Grain Refiner
  • Other
Typical Applications
Open System
Closed System
Sheet Production
General Characteristics
As Cast Grain Size [µm] 500
Color Coordinates
L* 90
a* 1,75
b* 25,2
c* 25,26
Mechanical Caracteristics
Tensile Strength (Rm) [MPa] 350
Yields strength (Rp0.2) [MPa] 250
Elongation Rupture (A) [%] 46
As cast Hardness [HV] 120
Hardness after 70% area red. [HV] 230
Hardness after annealing [HV] 125
Hardness after age-hardening [HV] 175
Casting Processing Parameters
Pre-mixing temperature [°C] 1080
Casting Temperatures Metal [°C] Flask [°C]
Thin (below 0.5 mm ) 1040 - 1080 680 - 720
Medium ( from 0.5-1.2 mm) 1020 - 1040 640 - 680
Thick (Thick 1.2 mm) 1000 - 1020 560 - 640
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 275 100 Cooling in furnuce
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