Danatronics ECHO Series - Acoustic Sound Speed for Common Materials

Danatronics, Corp.
92
Acoustic Sound Speed for Common Materials
The sound velocity table below shows a list of the speed of sound in various materials.
This information is necessary to have when using the gage as the speed of the ultrasound
moving through the material in question needs to be programmed into the gage to obtain
an accurate thickness. All velocities in this sound velocity table are approximations:
Material!
Sound-Velocity-Inch/µSecond!
Metres/second!
Air!
0.013!
330!
Aluminium!
0.250!
6300!
Alumina!Oxide!
0.390!
9900!
Beryllium!
0.510!
12900!
Boron!Carbide!
0.430!
11000!
Brass!
0.170!
4300!
Cadmium!
0.110!
2800!
Copper!
0.180!
4700!
Glass(crown)!
0.210!
5300!
Glycerine!
0.075!
1900!
Gold!
0.130!
3200!
Ice!
0.160!
4000!
Inconel!
0.220!
5700!
Iron!
0.230!
5900!
Iron!(cast)!
0.180!
4600!
Lead!
0.085!
2200!
Magnesium!
0.230!
5800!
Mercury!
0.057!
1400!
Molybdenum!
0.250!
6300!