Specific Gravity & Melting Point
| Metal |
°F |
°C |
Specific Gravity |
Weight in Troy OZ per CU IN |
| Aluminum |
1220 |
660 |
2.70 |
1.423 |
| Antinomy |
1167 |
630 |
6.62 |
3.488 |
| Beryllium |
2340 |
1282 |
1.82 |
0.959 |
| Bismuth |
520 |
271 |
9.80 |
5.163 |
| Cadmium |
610 |
321 |
8.65 |
4.557 |
| Carbon |
|
|
2.22 |
1.170 |
| Chromium |
3430 |
1888 |
7.19 |
3.788 |
| Cobalt |
2723 |
1495 |
8.90 |
8.900 |
| Copper |
1981 |
1083 |
8.96 |
4.719 |
| Gold |
1950 |
1065 |
19.32 |
10.180 |
| 18K Green |
1810 |
988 |
15.90 |
8.375 |
| 18K Yellow |
1700 |
927 |
15.58 |
8.211 |
| 18K White |
1730 |
943 |
14.64 |
7.712 |
| 18K Red |
1655 |
902 |
15.18 |
7.998 |
| 14K Green |
1765 |
963 |
14.20 |
7.482 |
| 14K Yellow |
1615 |
879 |
13.07 |
6.885 |
| 14K White |
1825 |
996 |
12.61 |
6.642 |
| 14K Red |
1715 |
935 |
13.26 |
6.986 |
| 10K Green |
1580 |
860 |
11.03 |
5.810 |
| 10K Yellow |
1665 |
907 |
11.57 |
6.096 |
| 10K White |
1975 |
1079 |
11.07 |
5.832 |
| 10K Red |
1760 |
960 |
11.59 |
6.106 |
| Iridium |
4449 |
2454 |
22.50 |
11.849 |
| Iron (Pure) |
2802 |
1539 |
7.87 |
4.145 |
| Lead |
621 |
328 |
11.34 |
5.973 |
| Magnesium |
1202 |
650 |
1.74 |
0.917 |
| Manganese |
2273 |
1245 |
7.43 |
3.914 |
| Molybdenum |
4760 |
2625 |
10.20 |
5.347 |
| Nickel |
2651 |
1455 |
8.90 |
4.691 |
| Osmium |
4892 |
2700 |
22.50 |
11.854 |
| Palladium |
2831 |
1555 |
12.00 |
6.322 |
| Phosphorus |
111 |
44 |
1.82 |
0.959 |
| Platinum |
3224 |
1773 |
21.45 |
11.301 |
| 15% Iridium Plat. |
3310 |
1821 |
21.59 |
11.373 |
| 10% Iridium Plat. |
3250 |
1788 |
21.54 |
11.349 |
| 5% Iridium Plat. |
3235 |
1779 |
21.50 |
11.325 |
| Rhodium |
3571 |
1967 |
12.44 |
6.533 |
| Ruthenium |
4500 |
2500 |
12.20 |
6.428 |
| Silicon |
2605 |
1430 |
2.33 |
1.247 |
| Silver |
1761 |
961 |
10.49 |
5.525 |
| Sterling Silver |
1640 |
893 |
10.36 |
5.457 |
| Coin Silver |
1615 |
879 |
10.31 |
5.430 |
| Tin |
450 |
232 |
7.30 |
3.846 |
| Zinc |
787 |
419 |
7.13 |
3.758 |
How to Determine Specific Gravities of Alloys
- Find the reciprocal of the specific gravity of each metal in the alloy. This is done by dividing 1 by the specific gravity. For example, the specific gravity of silver is 10.49 and the reciprocal is 1 divided by 10.49 or 0.094966.
- Multiply each reciprocal by the number of parts per thousand of that metal to be used.
- Add the results of the multiplication together.
- Divide 1000 by this total - the answer is the specific gravity of the alloy.
Example:
Find the specific gravity of 14K yellow gold having 583 parts gold, 104 parts silver, and 313 parts copper.
First Figure the Reciprocals of the Specific Gravities
- Fine gold: 1 divided by 19.32 = 0.051759
- Fine silver: 1 divided by 10.49 = 0.094966
- Fine copper: 1 divided by 8.96 = 0.111617
The Multiply
- Fine gold: 583 parts by 0.051759 = 30.128
- Fine silver: 104 parts by 0.094966 = 9.876
- Fine copper: 313 parts by 0.111617 = 34.956
- Total: 1000 75.014
1000 divided by 75.014 = 13.33 (the specific gravity of the alloy)
