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AlphaFine729

General Information
Category	Gold
Caratage	8-18K
Color	Red
Color Shade	Rose
Typology	Alloys For Gold
Production Process	Plastic Deformation and Handmade
Density [cm³]	12,9
Solidus [°C]	860
Liquidus [°C]	900
As cast hardness [HV]	145

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]	170

Color Coordinates
L*	84,5
a*	7,6
b*	16
c*	17,7

Mechanical Caracteristics
Tensile Strength (Rm) [MPa]	470
Yields strength (Rp0.2) [MPa]	275
Elongation Rupture (A) [%]	39
As cast Hardness [HV]	145
Hardness after 70% area red. [HV]	270
Hardness after annealing [HV]	150
Hardness after age-hardening [HV]	170

Casting Processing Parameters
Pre-mixing temperature [°C]	1050

Casting Temperatures	Metal [°C]	Flask [°C]
Thin (below 0.5 mm )	1020 - 1040	660 - 720
Medium ( from 0.5-1.2 mm)	1000 - 1020	600 - 660
Thick (Thick 1.2 mm)	960 - 1000	540 - 600

Trees without stones After casting, cooling time for the flaks is 45 minutes.

Stone-in-place casting trees After casting, cooling time for the flaks is 15 minutes.

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

Mechanical Working Parameters

Pre-mixing temperature [°C]	1030-1060
Pickling	Sulphuric Acid (%10)

Casting Temperature	Metal - from [°C]	Metal - to [°C]
Ingot Making	1060	1100
Continuous Casting	1080	1120

Reccomended reductions
Sheet - area or thickness [%]	70
Wire - diameter [%]	45

Mechanical working recommended annealing	Temperature [°C]	Time [min]
> 5 mm	640 - 680	40
1 - 5 mm	640 - 680	30
< 1 mm	640 - 680	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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