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AlphaCast101


General Information
Category Gold
Caratage 8-18K
Color Yellow
Color Shade Deep Yellow
Typology Alloys For Gold
Production Process İnvestment Casting
Density [cm3] 12,5
Solidus [°C] 824
Liquidus [°C] 874
As cast hardness [HV] 107
Ingredient
  • Ag
  • Cu
  • Zn
  • Ni
  • Deoxidant
  • Grain Refiner
  • Other
Typical Applications
Open System
Closed System
Sheet Production
General Characteristics
As Cast Grain Size [µm] 1220
Color Coordinates
L* 84,2
a* 2
b* 18,4
c* 18,5
Mechanical Caracteristics
Tensile Strength (Rm) [MPa] 402
Yields strength (Rp0.2) [MPa] 183
Elongation Rupture (A) [%] 46
As cast Hardness [HV] 107
Hardness after 70% area red. [HV] 270
Hardness after annealing [HV] 115
Hardness after age-hardening [HV] 125
Casting Processing Parameters
Pre-mixing temperature [°C] 1050
Casting Temperatures Metal [°C] Flask [°C]
Thin (below 0.5 mm ) 980 - 1020 660 - 700
Medium ( from 0.5-1.2 mm) 960 - 980 620 - 660
Thick (Thick 1.2 mm) 930 - 960 580 - 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 275 100 Cooling in furnuce
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