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AlphaCast305

18

General Information
Category	Gold
Caratage	18K
Color	Red
Color Shade	Red
Typology	Alloys For Gold
Production Process	İnvestment Casting
Density [cm³]	14,90
Solidus [°C]	870
Liquidus [°C]	890
As cast hardness [HV]	160

Ingredient

Ag Cu Zn Ni Deoxidant Grain Refiner Other

Typical Applications
Open System
Closed System
Sheet Production

General Characteristics
As Cast Grain Size [µm]

Color Coordinates
L*
a*
b*
c*

Mechanical Caracteristics
Tensile Strength (Rm) [MPa]	480
Yields strength (Rp0.2) [MPa]
Elongation Rupture (A) [%]	45
As cast Hardness [HV]	160
Hardness after 70% area red. [HV]
Hardness after annealing [HV]
Hardness after age-hardening [HV]	257

Casting Processing Parameters
Pre-mixing temperature [°C]	1120

Casting Temperatures	Metal [°C]	Flask [°C]
Thin (below 0.5 mm )	1020 - 1040	650 - 680
Medium ( from 0.5-1.2 mm)	1000 - 1020	600 - 650
Thick (Thick 1.2 mm)	990 - 1000	550 - 600

Trees without stones

Stone-in-place casting trees

Pickling :

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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