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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]	11,45
Solidus [°C]	850
Liquidus [°C]	915
As cast hardness [HV]	135

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]	200

Color Coordinates
L*	85,3
a*	7,4
b*	15,5
c*	17,17

Mechanical Caracteristics
Tensile Strength (Rm) [MPa]	470
Yields strength (Rp0.2) [MPa]	280
Elongation Rupture (A) [%]	33
As cast Hardness [HV]	135
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

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]	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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