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AlphaUni916


General Information
Category Gold
Caratage 21K-22K
Color Yellow
Color Shade Light Yellow
Typology Alloys For Gold
Production Process General
Density [cm3] 17.57
Solidus [°C]
Liquidus [°C]
As cast hardness [HV]
Ingredient
  • Ag
  • Cu
  • Zn
  • Ni
  • Deoxidant
  • Grain Refiner
  • Other
Typical Applications
Open System
Closed System
Press
CNC and Lathe Production
Handmade
Hollow Chain
Machine Chain
Wire Production
Production of tube from continuous casting
Sheet Production
Hollow chain Production
General Characteristics
As Cast Grain Size [µm]
Color Coordinates
L*
a*
b*
c*
Mechanical Caracteristics
Tensile Strength (Rm) [MPa]
Yields strength (Rp0.2) [MPa]
Elongation Rupture (A) [%]
As cast Hardness [HV]
Hardness after 70% area red. [HV]
Hardness after annealing [HV]
Hardness after age-hardening [HV]
Casting Processing Parameters
Pre-mixing temperature [°C] 1100
Casting Temperatures Metal [°C] Flask [°C]
Thin (below 0.5 mm ) 1100 - 1130 720 - 750
Medium ( from 0.5-1.2 mm) 1080 - 1100 700 - 730
Thick (Thick 1.2 mm) 1060 - 1080 680 - 700
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
Mechanical Working Parameters
Pre-mixing temperature [°C] 1020-1080
Pickling Sulphuric Acid (%10)
Casting Temperature Metal - from [°C] Metal - to [°C]
Ingot Making 1020 1080
Continuous Casting 1080 1120
Reccomended reductions
Sheet - area or thickness [%] 65
Wire - diameter [%] 45
Mechanical working recommended annealing Temperature [°C] Time [min]
> 5 mm 660 - 700 40
1 - 5 mm 660 - 700 30
< 1 mm 660 - 700 20
Age Hardening Processing Parameters
Single step age-hardening treatment Temperature [°C] Time [min] Quenching Age-hardening
Age-hardening 325 100 Cooling in furnuce
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