TN_US-BA-e-2020
19
7.
Sound velocities
Material
Sound velocity
In/us
m/s
Aluminium
0.250
6340-6400
Conventional steel
0.233
5920
Stainless steel
0.226
5740
Brass
0.173
4399
Copper
0.186
4720
Iron
0.233
5930
Cast Iron
0.173-0.229
4400
－
5820
Lead
0.094
2400
Nylon
0.105
2680
Silver
0.142
3607
Gold
0.128
3251
Zinc
0.164
4170
Titanium
0.236
5990
Sheet metal
0.117
2960
Epoxy
0.109
2760
Resin
0.100
2540
Ice
0.157
3988
Nickel
0.222
5639
Plexiglas
0.106
2692
Styrofoam
0.092
2337
Porcelain
0.230
5842
PVC
0.094
2388
Quartz glass
0.222
5639
Rubber
0.091
2311
Teflon
0.056
1422
Water
0.058
1473
8.
The measurement of tubes and hose material
If a piece of pipe is measured to determine the thickness of the pipe wall, the
positioning of the transducer is important. If the diameter of the pipe is greater than
4 inches, the position of the transducer on the pipe should be such that the incision on
the contact surface is perpendicular to the long axis of the pipe.
For smaller pipe diameters, two measurements should be made at the same location,
one with the incision on the contact surface perpendicular to the long axis and the other
parallel to it. The smaller of these two measurements is then taken as the exact
measurement of this point.
