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AlphaUni230

18

General Information
Category	Gold
Caratage	18K
Color	White
Color Shade	Premium White
Typology	Altın Ön Alaşımı
Production Process	Genel
Density [cm³]	14.63
Solidus [°C]	910
Liquidus [°C]	939
As cast hardness [HV]	212

Ingredient

Ag Cu Zn Ni Deoxidant Grain Refiner Other

Typical Applications
Open System
Closed System
Press
Sheet Production

General Characteristics
As Cast Grain Size [µm]

Color Coordinates
L*	86.51
a*	1.73
b*	10.62
c*	10.75

Mechanical Caracteristics
Tensile Strength (Rm) [MPa]	563
Yields strength (Rp0.2) [MPa]	342
Elongation Rupture (A) [%]	44
As cast Hardness [HV]	212
Hardness after 70% area red. [HV]
Hardness after annealing [HV]
Hardness after age-hardening [HV]	211

Casting Processing Parameters
Pre-mixing temperature [°C]	1180

Casting Temperatures	Metal [°C]	Flask [°C]
Thin (below 0.5 mm )	1100 - 1150	700 - 730
Medium ( from 0.5-1.2 mm)	1080 - 1120	680 - 700
Thick (Thick 1.2 mm)	1070 - 1100	650 - 680

Trees without stones

Stone-in-place casting trees

Pickling :

Mechanical Working Parameters

Pre-mixing temperature [°C]	1120-1180
Pickling

Casting Temperature	Metal - from [°C]	Metal - to [°C]
Ingot Making	1120	1150
Continuous Casting	1140	1180

Reccomended reductions
Sheet - area or thickness [%]	65
Wire - diameter [%]	45

Mechanical working recommended annealing	Temperature [°C]	Time [min]
> 5 mm	680 - 700	40
1 - 5 mm	680 - 700	30
< 1 mm	680 - 700	20

Age Hardening Processing Parameters
Single step age-hardening treatment	Temperature [°C]	Time [min]	Quenching	Age-hardening
Age-hardening	275	100	Cooling in furnace

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