|
Common
Physical Constants
|
| Acceleration
of gravity, g |
32.17
ft/s2 = 9.807 m/s 2 |
| Speed
of Light in a Vacuum |
299,792,458
m/sec |
| Density
of water |
62.4
lbm/ft3 = 1 g/cm3
1 gal H2 O = 8.345 lbm |
| Gas
Constant, R |
1545
ft-lbf/pmole-R = 8.314 J/gmole-K |
| Gas
volume (STP: 68°F, 1 atm) |
359
ft 3 /pmole = .02241 m3
/gmole |
| Joule's
Constant, J |
778
ft-lbf/BTU |
| Poisson's
ratio, µ |
.3
(for steel)
|
| Modulus
of Elasticity (steel) |
30
X 10 6 psi |
|
Common
Steel Densities:
|
| Carbon
& Low-Alloy Steels |
0.283
lbm/in 3 = 7.84 g/cm3 |
| 304
SS |
0.29
lbm/in 3 = 7.88 g/cm3
|
| Tool
Steels |
Carbon
Steels X 1.000 |
| Moly
High Speed |
Carbon
Steels X 1.035 |
| Multiphase
Alloys |
Carbon
Steels X 1.074 |
| Steel
Tensile Strength (psi) |
~
500 X Brinell Number |
