LanguagesTechnical Advice
Casting temperature guide
Important: Metal pouring temperature will vary slightly depending upon particular alloy used. Flask casting temperatures will depend upon the type of casting.
| Metal | Metal Pouring Temperature (°C) |
Flask Casting Temperature (°C) |
Metal to Wax Ratio |
|---|---|---|---|
| Aluminium | 750 - 800 | 200 - 250 | 2.5:1 |
| Silver | 950 - 1050 | 400 - 450 | 9:1 |
| Brass | 950 - 1050 | 580 - 650 | 10:1 |
| 9ct. Yellow Gold | 940 - 1040 | 500 - 600 | 11:1 |
| 9ct. White Gold | 970 - 1070 | 500 - 600 | 11:1 |
| 14ct. Yellow Gold | 900 - 1000 | 500 - 600 | 14:1 |
| 14ct. White Gold | 1150 - 1250 | 500 - 600 | 14:1 |
| 18ct. Yellow Gold | 940 - 1040 | 500 - 600 | 16:1 |
| 18ct. White Gold | 1025 - 1125 | 500 - 600 | 16:1 |
| 22ct. Yellow Gold | 1000 - 1150 | 600 - 700 | 18:1 |
| Silicon Bronze | 1010 - 1230 | 475 - 550 | 10:1 |
| Beryllium | 1010 - 1120 | 400 - 475 | 10:1 |
| Platinum (Pure) | 1800 - 1900 | 870 - 970 | 21:1 |
Melting point and specific gravity of jewelry alloys
| Metal | Melting Point (°F) |
Melting Point (°C) |
Specific Gravity |
|---|---|---|---|
| Gold | 1945 | 1063 | 19:36 |
| 18ct. Green | 1810 | 988 | 21:36 |
| 18ct. Yellow | 1700 | 927 | 13:55 |
| 18ct. White | 1730 | 943 | 15:21 |
| 18ct. Red | 1655 | 902 | 04:19 |
| 14ct. Green | 1765 | 963 | 04:48 |
| 14ct. Yellow | 1615 | 879 | 01:40 |
| 14ct. White | 1825 | 996 | 14:38 |
| 14ct. Red | 1715 | 935 | 06:14 |
| 10ct. Green | 1580 | 860 | 00:43 |
| 10ct. Yellow | 1665 | 907 | 13:40 |
| 10ct. White | 1975 | 1079 | 01:40 |
| 10ct. Red | 1760 | 960 | 14:09 |
| Platinum | 3224 | 1773 | 10:48 |
| 15% Iridio Platinum | 3310 | 1821 | 14:09 |
| 10% Iridio Platinum | 3250 | 1788 | 12:57 |
| 5% Iridio Platinum | 3235 | 1779 | 12:00 |
| Silver | 1761 | 961 | 12:43 |
| Sterling | 1640 | 893 | 09:36 |
| Coin | 1615 | 879 | 08:24 |
Calculating investment powder and volume of water required for various flask sizes
Water to Powder Ratio 40:100
| Diameter of Flask |
50mm (2in) |
75mm (3in) |
100mm (4in) |
125mm (5in) |
150mm (6in) |
175mm (7in) |
200mm (8in) |
|
|---|---|---|---|---|---|---|---|---|
| 55mm (2in) | 150 57 | 220 88 | 290 116 | - - | - - | - - | - - | Powder (g) Water (cc) |
| 75mm (3in) | 340 136 | 510 204 | 680 272 | 850 340 | 910 364 | 1250 500 | - - | Powder (g) Water (cc) |
| 100mm (4in) | 510 204 | 770 308 | 1020 408 | 1300 520 | 1590 636 | 1820 728 | 2050 820 | Powder (g) Water (cc) |
| 125mm (5in) | - - | - - | 1700 680 | 2160 864 | 2500 1000 | 2950 1180 | 3400 1360 | Powder (g) Water (cc) |
Water to Powder Ratio 38:100
| Diameter of Flask |
50mm (2in) |
75mm (3in) |
100mm (4in) |
125mm (5in) |
150mm (6in) |
175mm (7in) |
200mm (8in) |
|
|---|---|---|---|---|---|---|---|---|
| 55mm (2in) | 150 60 | 220 84 | 290 110 | - - | - - | - - | - - | Powder (g) Water (cc) |
| 75mm (3in) | 340 129 | 510 194 | 680 258 | 850 323 | 910 346 | 1250 475 | - - | Powder (g) Water (cc) |
| 100mm (4in) | 510 194 | 770 293 | 1020 388 | 1300 494 | 1590 604 | 1820 692 | 2050 779 | Powder (g) Water (cc) |
| 125mm (5in) | - - | - - | 1700 646 | 2160 821 | 2500 959 | 2950 1121 | 3400 1292 | Powder (g) Water (cc) |
Bulk Mix Proportioning Chart
| Weight of Water Investment |
Total Slurry Volume (cc) |
Total Water Volume (cc) |
Total Slurry Volume (cc) |
Total Water Volume (cc) |
|---|---|---|---|---|
| 0.5 | 190 | 385 | 200 | 395 |
| 1 | 380 | 770 | 400 | 790 |
| 2 | 760 | 1540 | 800 | 1580 |
| 5 | 1900 | 3850 | 2000 | 3950 |
| 10 | 3800 | 7700 | 4000 | 7900 |
The above product information is given in good faith as accurate and reliable but is not to be taken as a guarantee. The figures provided are intended to be a guide to expected average values and should not be interpreted as a specification. Any potential applications referred to are not to be construed as recommendations. It is the responsibility of the user to determine suitability for any specific purpose.