 Division Watches and Jewelry |
Data sheet for alloy | |||
| Au 750/3146 Pd | ||||
| Colour | white | Code | 3146 | |
| 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. |
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| Physical properties | Specific gravity [g/cm3] | 15.95 | Melting range [°C] | 1065-1135 |
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| Mechanical properties | Annealed | 20% cold worked | 75% cold worked | ||
|---|---|---|---|---|---|
| Vickers hardness | [HV1] | 135 | 215 | 245 | |
| Yield hardness | Rm | [Mpa] | 480 | 670 | 845 |
| Elastic limit | Rp0.2 | [MPa] | 295 | 630 | 720 |
| Plastic elongation | A | [%] | 30 | 3 | 2 |
| Processing guidelines | |
|---|---|
| ANNEALING | 650 °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° 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. |
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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 |
03.06.2002 |