Machinery's Handbook, 31st Edition
372
Thermal Properties of Materials Table 8. Typical Values of Coefficient of Linear Thermal Expansion for Thermoplastics and Other Commonly Used Materials Material a in/in/deg F 3 10 − 5 cm/cm/deg C 3 10 − 5 Material a in/in/deg F 3 10 − 5
cm/cm/deg C 3 10 − 5
Liquid Crystal—GR
0.3 0.4 0.6 0.8 0.9 1.0 1.0 1.2 1.2 1.3 1.4 1.4 1.7 1.7
0.6 0.7 1.1 1.4 1.6 1.8 1.8 2.2 2.2 2.3 2.5 2.5 3.1 3.1
ABS—GR
1.7 1.8 2.0 2.0 2.2 3.0 3.6 3.8 4.0 4.5 4.8 4.8 6.9 7.2
3.1 3.2 3.6 3.6 4.0 5.4 6.5 6.8 7.2 8.1 8.5 8.6
Glass Steel
Polypropylene—GR
Epoxy—GR Polyphenylene sulfide—GR Acetal—GR
Concrete
Copper Bronze Brass
Epoxy
Polycarbonate
Aluminum
Acrylic ABS Nylon Acetal
Polycarbonate—GR
Nylon—GR
TP polyester—GR
Magnesium
Polypropylene TP Polyester Polyethylene
Zinc
12.4
ABS—GR 13.0 a GR = Typical glass fiber-reinforced material. Other plastics materials shown are unfilled. Table 9. Linear Expansion of Various Substances between 32 and 212 ° F Expansion of Volume = 3 3 Linear Expansion
Linear Expansion
Linear Expansion
Substance
for 1 ° F
for 1 ° C
Substance
for 1 ° F
for 1 ° C
Brick
0.0000030 0.0000054 Masonry, brick from 0.0000026 0.0000047
Cement, Portland
0.0000060 0.0000108 0.0000080 0.0000144 Plaster 0.0000428 0.0000770 Porcelain 0.0000050 0.0000090 Quartz, from 0.0000040 0.0000072 0.0000044 0.0000079 Slate 0.0000031 0.0000056 Sandstone 0.0000079 0.0000142 Wood, pine to
to
0.0000050 0.0000090 0.0000092 0.0000166 0.0000020 0.0000036 0.0000043 0.0000077 0.0000079 0.0000142 0.0000058 0.0000104 0.0000065 0.0000117 0.0000028 0.0000050
Concrete Ebonite
Glass, thermometer
Glass, hard Granite Marble, from
to
Table 10. Coefficients of Heat Transmission
Metal
Btu per Second
Metal
Btu per Second
Metal
Btu per Second
Aluminum Antimony Brass, yellow Brass, red
0.00203 0.00022 0.00142 0.00157 0.00404
German silver
0.00050 0.00089 0.00045 0.00011 0.00034
Steel, soft
0.00062 0.00610 0.00084 0.00170
Iron Lead
Silver Tin Zinc
Mercury Steel, hard
Copper … Heat transmitted, in British thermal units, per second, through metal 1 inch thick, per square inch of surface, for a temperature difference of 1 ° F. Table 11. Coefficients of Heat Radiation Surface Btu per Hour Surface Btu per Hour Cast-iron, new 0.6480 Sawdust 0.7215 Cast-iron, rusted 0.6868 Sand, fine 0.7400 Copper, polished 0.0327 Silver, polished 0.0266 Glass 0.5948 Tin, polished 0.0439 Iron, ordinary 0.5662 Tinned iron, polished 0.0858 Iron, sheet-, polished 0.0920 Water 1.0853 Oil 1.4800 … … Heat radiated, in British thermal units, per square foot of surface per hour, for a temperature difference of 1 ° F. …
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