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AlphaFine742


General Information
Category Gold
Caratage 18K
Color Yellow
Color Shade Deep Yellow
Typology Alloys For Gold
Production Process Plastic Deformation and Handmade
Density [cm3] 15
Solidus [°C] 845
Liquidus [°C] 865
As cast hardness [HV] 177
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] 35
Color Coordinates
L* 83,70
a* 3,90
b* 20,7
c* 20,96
Mechanical Caracteristics
Tensile Strength (Rm) [MPa] 460
Yields strength (Rp0.2) [MPa] 292
Elongation Rupture (A) [%] 42
As cast Hardness [HV] 177
Hardness after 70% area red. [HV] 272
Hardness after annealing [HV] 157
Hardness after age-hardening [HV] 258
Mechanical Working Parameters
Pre-mixing temperature [°C] 950-990
Pickling Sulphuric Acid (%10)
Casting Temperature Metal - from [°C] Metal - to [°C]
Ingot Making 960 990
Continuous Casting 970 1050
Reccomended reductions
Sheet - area or thickness [%] 70
Wire - diameter [%] 45
Mechanical working recommended annealing Temperature [°C] Time [min]
> 5 mm 630 - 670 40
1 - 5 mm 630 - 670 30
< 1 mm 630 - 670 20
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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