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SUMMARY OF COEFFICIENT OF EXPANSION
FOR COMMON GLASSES AND
METALS
(with melting points
for common metals)
Glass information
Metals information
| Type of Glass |
Coefficient of expansion |
|
Bullseye tested compatible
(Also Uroboros 90) |
90 |
|
Effetre (Morretti) sheets and
rods
(some variation; should test) |
104 |
|
Spectrum System 96
(also Uroboros 96) |
96 |
| Borosilicate (Pyrex) |
32.5 |
|
Window (float) glass
(Also includes most
bottles) |
83 to 87 (depends on
manufacturer)
May be even higher or lower |
Source: Manufacturer's data
| Type of metal |
Coefficient of Expansion |
Melting point (°F) |
Melting point (°C) |
| Aluminum |
248 |
1218 |
659 |
| Brass, navy |
212 |
1650 |
900 |
| Copper |
176 |
1981 |
1081 |
| Gold |
140 |
1945 |
1061 |
| Iron, cast |
108 |
2300 |
1260 |
| Lead |
295 |
621 |
328 |
| Silver |
191 |
1764 |
962 |
| Steel, high carbon |
121 |
2500 |
1374 |
| Steel, stainless |
171 |
2600-2750 |
1430-1507 |
| Tin |
398 |
788 |
415 |
Note: These are
for pure metals. Alloys can vary widely. I have seen other sources
with slightly different COEs, but most are close to these figures. (And
besides, they're close enough for government work.)
Source: U.S. Military Training
Circular No. 9-237, "Welding Theory and Application."
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