Division Watches and Jewelry	Data sheet for alloy
	Au 750/3168 Pd
	Colour	white	Code	3168

General description	18 ct white gold nickel-free alloy containing Pd, for universal use. It can easily be cupped, stamped, rolled, drawn, polished and machined. Suitable for casting under protective atmosphere. It does not require Rhodium plating.

Physical properties	Specific gravity [g/cm3]	16.15	Melting range [°C]	1200-1315

Mechanical properties			Annealed	20% cold worked	75% cold worked
Vickers hardness		[HV1]	120	180	220
Yield hardness	Rm	[Mpa]	470	600	860
Elastic limit	Rp0.2	[MPa]	220	530	815
Plastic elongation	A	[%]	35	3	1

Processing guidelines
ANNEALING	750 °C for 20 to 30 minutes then quenched in water. In order to avoid oxidation, work under reducing atmosphere.
COLD WORKING	The amount of coldwork completed before annealing should be between 30% and 75% reduction in area.
SOLDERING	By torch or furnace. The nickel-free solders N° 3531 (1015-1090 °C) , N° 3532 (840-910 °C), 3533 (925-985 °C), 3534 (750-810 °C) and 3535 (650-780 °C) are strongly recommended. For alternatives please see list of solders.
PICKLING	with DESOXYD (following operating instructions) or with hot 10% sulphuric acid added to hot 10 g/l ammonium persulphate. The slight change of colour which could appear can be removed by polishing.
CASTING	Using a phosphated coating is recommended
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18.03.2005

METALOR Technologies SA - Av. du Vignoble - CH-2009 Neuchâtel Phone: +41(0)32 720 61 11 - http://www.metalor.com/watch

28.01.2000

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