 Division Watches and Jewelry |
Data sheet for alloy | |||
| Au 375/429 | ||||
| Colour | yellow | Code | 429 | |
| General description | 9 ct standard yellow gold alloy, for universal use. It can easily be cupped, stamped, rolled, polished, drawn and machined. Suitable for casting in air. |
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| Physical properties | Specific gravity [g/cm3] | 11.15 | Melting range [°C] | 805-895 |
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| Mechanical properties | Annealed | 20% cold worked | 75% cold worked | ||
|---|---|---|---|---|---|
| Vickers hardness | [HV1] | 130 | 180 | 250 | |
| Yield hardness | Rm | [Mpa] | 500 | 600 | 1000 |
| Elastic limit | Rp0.2 | [MPa] | 300 | 500 | 900 |
| Plastic elongation | A | [%] | 40 | 5 | 1 |
| Processing guidelines | |
|---|---|
| ANNEALING | 625 °C for 20 to 30 minutes then quenched in water or cooling under protective atmosphere (in this case it can harden a light). 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 cadmium-free solders N° 331 (775-785 °C) - 332 (700-750 °C) and 335 (655-700 °C) are strongly recommended. For alternatives please see list of solders. |
| PICKLING | with DESOXYD (following operating instructions) or with hot 10% sulphuric acid. |
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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 |
10.12.1999 |