Coefficient of expansion for common glasses and metals

Type of Glass	Coefficient of expansion
Bullseye tested compatible (Also Uroboros 90)	90
Effetre (Moretti) 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."

For a technical discussion of the thermal expansion calculation for glass, go here: http://glassproperties.com/expansion/ExpansionMeasurement.htm