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Elcometer Speed of Sound Through Materials >

Speed of Sound Through Materials

Elcometer Ultrasonic Thickness Gauges can be calibrated by the user for the appropriate material in two ways:

Set the calibration to the thickness of the known standard of the same material
Set the frequency calibration to the appropriate value using the velocity chart below

The Elcometer 204 is pre-calibrated for Steel only.

Material	km/sec	in/msec	Material	km/sec	in/msec
Air	0.33	0.013	Neoprene	1.60	0.063
Aluminium (2024-T4)	6.38	0.251	Nickel	5.64	0.222
Beryllium	12.88	0.507	Nylon	2.69	0.106
Boron Carbide	10.92	0.430	Platinum	3.69	0.156
Brass	4.39	0.173	Plexiglass	2.69	0.106
Cadmium	2.77	0.109	Polystyrene	2.34	0.092
Copper	4.65	0.183	Polyurethane	1.78	0.070
Glass (Plate)	5.77	0.227	PVC	2.39	0.094
Glycerine	1.93	0.076	Quartz	5.74	0.226
Gold	3.25	0.128	Silver	3.61	0.142
Inconel	5.82	0.229	Steel (4340)	5.84	0.230
Iron	5.89	0.232	Steel (303 Stainless)	5.66	0.223
Iron, Cast	4.55	0.179	Teflon	1.52	0.060
Lead	2.16	0.085	Tin	3.33	0.131
Magnesium	5.84	0.230	Titanium	6.10	0.240
Mercury	1.45	0.057	Tungsten	5.18	0.204
Molybdenum	6.25	0.246	Uranium	3.38	0.133
Monel	5.36	0.211	Water	1.47	0.058
Motor Oil (SAE 30)	1.75	0.069	Zinc	4.32	0.170

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