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AlphaCast108


General Information
Category Gold
Caratage 8K-9K
Color Yellow
Color Shade Light Yellow
Typology Alloys For Gold
Production Process İnvestment Casting
Density [cm3] 11
Solidus [°C] 805
Liquidus [°C] 865
As cast hardness [HV] 110
Ingredient
  • Ag
  • Cu
  • Zn
  • Ni
  • Deoxidant
  • Grain Refiner
  • Other
Typical Applications
Open System
Closed System
Sheet Production
General Characteristics
As Cast Grain Size [µm] 650
Color Coordinates
L* 87,9
a* 0,5
b* 18,2
c* 18,2
Mechanical Caracteristics
Tensile Strength (Rm) [MPa] 522
Yields strength (Rp0.2) [MPa] 285
Elongation Rupture (A) [%] 30
As cast Hardness [HV] 110
Hardness after 70% area red. [HV] 245
Hardness after annealing [HV] 125
Hardness after age-hardening [HV] 165
Casting Processing Parameters
Pre-mixing temperature [°C] 980
Casting Temperatures Metal [°C] Flask [°C]
Thin (below 0.5 mm ) 980 - 1000 660 - 720
Medium ( from 0.5-1.2 mm) 960 - 980 600 - 660
Thick (Thick 1.2 mm) 940 - 960 540 - 600
After casting, cooling time for the flaks is 15 m
After casting, cooling time for the flaks is 45 m
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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