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AlphaFine748

General Information
Category	Gold
Caratage	8-18K
Color	Yellow
Color Shade	Light Yellow
Typology	Alloys For Gold
Production Process	Universal
Density [cm³]	14,9
Solidus [°C]	835
Liquidus [°C]	870
As cast hardness [HV]	170

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]	40

Color Coordinates
L*	83,9
a*	3,7
b*	20,9
c*	21,22

Mechanical Caracteristics
Tensile Strength (Rm) [MPa]	440
Yields strength (Rp0.2) [MPa]	285
Elongation Rupture (A) [%]	40
As cast Hardness [HV]	170
Hardness after 70% area red. [HV]	260
Hardness after annealing [HV]	180
Hardness after age-hardening [HV]	250

Casting Processing Parameters
Pre-mixing temperature [°C]	960

Casting Temperatures	Metal [°C]	Flask [°C]
Thin (below 0.5 mm )	1000 - 1020	660 - 720
Medium ( from 0.5-1.2 mm)	980 - 1000	600 - 660
Thick (Thick 1.2 mm)	960 - 980	540 - 600

Trees without stones After casting, cooling time for the flaks is 15 m

Stone-in-place casting trees After casting, cooling time for the flaks is 45 m

Pickling : Sulphuric acid (%10) - 5 min - 50°C

Mechanical Working Parameters

Pre-mixing temperature [°C]	950-990
Pickling	Sulphuric Acid (%10)

Casting Temperature	Metal - from [°C]	Metal - to [°C]
Ingot Making	950	990
Continuous Casting	960	1040

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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