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AlphaRoyal3048


General Information
Category Gold
Caratage 8-10K
Color Red
Color Shade Red
Typology Alloys For Gold
Production Process İnvestment Casting
Density [cm3] 10,6
Solidus [°C] 845
Liquidus [°C] 950
As cast hardness [HV] 140
Ingredient
  • Ag
  • Cu
  • Zn
  • Ni
  • Deoxidant
  • Grain Refiner
  • Other
Typical Applications
General Characteristics
As Cast Grain Size [µm] 200
Color Coordinates
L* 85
a* 7,2
b* 15,5
c* 17
Mechanical Caracteristics
Tensile Strength (Rm) [MPa] 380
Yields strength (Rp0.2) [MPa] 160
Elongation Rupture (A) [%] 41
As cast Hardness [HV] 140
Hardness after 70% area red. [HV] 260
Hardness after annealing [HV] 145
Hardness after age-hardening [HV] 150
Casting Processing Parameters
Pre-mixing temperature [°C] 1050
Casting Temperatures Metal [°C] Flask [°C]
Thin (below 0.5 mm ) 1050 - 1080 660 - 720
Medium ( from 0.5-1.2 mm) 1030 - 1050 600 - 660
Thick (Thick 1.2 mm) 1010 - 1030 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 300 100 Cooling in furnuce
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