 Division Watches and Jewelry |
Data sheet for alloy | |||
| Pt 950/3902 | ||||
| Colour | white | Code | 3902 | |
| General description | 950 o/oo Platinum alloy, hardnable at 300 HV. Can be cupped, stamped, rolled and drawn. Suitable for casting |
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| Physical properties | Specific gravity [g/cm3] | 19.45 | Melting range [°C] | 1545-1640 |
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| Mechanical properties | Annealed | 20% cold worked | 75% cold worked | ||
|---|---|---|---|---|---|
| Vickers hardness | [HV1] | 155 | 215 | 265 | |
| Yield hardness | Rm | [Mpa] | 525 | 700 | 845 |
| Elastic limit | Rp0.2 | [MPa] | 300 | 640 | 810 |
| Plastic elongation | A | [%] | 30 | 2 | 1 |
| Processing guidelines | |
|---|---|
| ANNEALING | 850 °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 Platinum solders N° 286 (1430-1450 °C) - 2182 (1345-1375 °C) - 283 (1250-1300 °C) et 281 (1050-1115 °C) are strongly recommended. For alternatives please see list of solders. |
| PICKLING | A surface oxidation can be removed by polishing, or thermal treatment under reducing atmosphere at 850 °C for some minutes. |
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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 |
05.07.1999 |