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AlphaFine765


General Information
Category Gold
Caratage 8-18K
Color Red
Color Shade Rose
Typology Alloys For Gold
Production Process İnvestment Casting
Density [cm3] 11,45
Solidus [°C] 855
Liquidus [°C] 910
As cast hardness [HV] 140
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] 230
Color Coordinates
L* 85,3
a* 7,4
b* 15,5
c* 17,17
Mechanical Caracteristics
Tensile Strength (Rm) [MPa] 460
Yields strength (Rp0.2) [MPa] 270
Elongation Rupture (A) [%] 32
As cast Hardness [HV] 140
Hardness after 70% area red. [HV] 265
Hardness after annealing [HV] 145
Hardness after age-hardening [HV] 155
Casting Processing Parameters
Pre-mixing temperature [°C] 1060
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) 1000 - 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
Mechanical Working Parameters
Pre-mixing temperature [°C] 1060-1101
Pickling Sulphuric Acid (%10)
Casting Temperature Metal - from [°C] Metal - to [°C]
Ingot Making 1061 1100
Continuous Casting 1060 1141
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 300 100 Cooling in furnuce
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