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AlphaUni270

General Information
Category	Gold
Caratage	10-18K
Color	White
Color Shade	Standart White
Typology	Alloys For Gold
Production Process	General
Density [cm³]	12,6
Solidus [°C]	925
Liquidus [°C]	975
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
Wire Production
Sheet Production

General Characteristics
As Cast Grain Size [µm]	140

Color Coordinates
L*	83,6
a*	1,4
b*	9,9
c*	10

Mechanical Caracteristics
Tensile Strength (Rm) [MPa]	580
Yields strength (Rp0.2) [MPa]	345
Elongation Rupture (A) [%]	30
As cast Hardness [HV]	135
Hardness after 70% area red. [HV]	295
Hardness after annealing [HV]	155
Hardness after age-hardening [HV]	180

Casting Processing Parameters
Pre-mixing temperature [°C]	1100

Casting Temperatures	Metal [°C]	Flask [°C]
Thin (below 0.5 mm )	1020 - 1050	660 - 700
Medium ( from 0.5-1.2 mm)	1000 - 1020	620 - 660
Thick (Thick 1.2 mm)	980 - 1000	580 - 620

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]	1030-1080
Pickling	Sulphuric acid (%10)

Casting Temperature	Metal - from [°C]	Metal - to [°C]
Ingot Making	1030	1080
Continuous Casting	1060	1120

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

Mechanical working recommended annealing	Temperature [°C]	Time [min]
> 5 mm	660 - 680	40
1 - 5 mm	660 - 680	30
< 1 mm	660 - 680	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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