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AlphaFine734


General Information
Category Gold
Caratage 8-21K
Color Red
Color Shade Red
Typology Alloys For Gold
Production Process Universal
Density [cm3] 16,5
Solidus [°C] 920
Liquidus [°C] 930
As cast hardness [HV] 115
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] 50
Color Coordinates
L* 85,5
a* 10,1
b* 19,5
c* 21,96
Mechanical Caracteristics
Tensile Strength (Rm) [MPa] 400
Yields strength (Rp0.2) [MPa] 215
Elongation Rupture (A) [%] 40
As cast Hardness [HV] 115
Hardness after 70% area red. [HV] 220
Hardness after annealing [HV] 125
Hardness after age-hardening [HV] 120
Casting Processing Parameters
Pre-mixing temperature [°C] 1030
Casting Temperatures Metal [°C] Flask [°C]
Thin (below 0.5 mm ) 1040 - 1070 660 - 720
Medium ( from 0.5-1.2 mm) 1020 - 1040 600 - 660
Thick (Thick 1.2 mm) 1000 - 1020 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] 1020-1050
Pickling Sulphuric Acid (%10)
Casting Temperature Metal - from [°C] Metal - to [°C]
Ingot Making 1020 1050
Continuous Casting 1040 1120
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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