The Ultrasonic Thickness Gauges (UTG) / Material Thickness Gauges (MTG) can be programmed by the user to the appropriate Material in two ways :

  • Using known standards of the same material – set the calibration to the thickness
  • Using the Frequency calibration, set the frequency to the appropriate Material using the Velocity / Speed of Sound Chart below.
Metals
m/s m/s
A Aluminium 6 320 – 6 400 M Molybdenum 6 250 – 6 300
Aluminium (2024-T4) 6 380 Mercury 1 450
Asbestos Cement 2 200 N Nickel 5 480 – 6 040
B Beryllium 12 880 P Platinum 3 690
Boron Carbide 10 920 S Silver 3 600 – 3 700
Brass 4 390 Steel, Mild 5 900 – 6 100
C Cast Iron 3 500 – 5 600 Steel, Casting (4340) 5 850
Cast Iron (Modular  Graphite) 5 600 Steel, 303 Stainless (Austenitic) 5 660 – 6 120
Cast Grey Middle 4 600 Stellite 7 050
Copper 4 650 – 4 720 T Tin 3 300 – 3 330
Cadmium 2 770 – 2 800 Titanium 5 900 – 6 100
Chromium 6 200 Tungsten Carbon 6 650
G Gold 3 200 – 3 250 Tungsten 5 180 – 5 400
I Inconel 5 820 U Uranium 3380
Iron 5 890 – 5 930 W Wolfram 5 460
L Lead 1 960 – 2 400 Z Zinc 4 170 – 4 320
M Manganese 4 660 – 4 700 Zircaloy 2 4 700
Magnesium 5 770 – 5 840 Zirconium 4 650
Non-Metal
m/s m/s
A Acrylic 2 870 N Nylon 2 600 – 2 690
Acrylic Resin 2 730 – 2 870 O Oil (SAE 30) 1 740
Air 330 P Paraffin Wax 2 200
Aluminium Oxide 8 700 Perspex 2 860
C Ceramic (Macor) 5 631 Phenolic 1 400
Diamond 17 500 Plexi Glass 2 690
Diesel Oil 1 250 Polyamide 2 380
Epoxy Resin 2 650 Polyethylene 1 900 – 2 400
G Glass (Flint) 4 260 Polyurethane 1 780 – 1 900
Glass (Crown) 5 260 – 6 120 Polystyrene 2 340 – 2 400
Glass (Quartz) 5 570 Porcelain 5 600 – 5 900
Glass (Window) 6 800 PVC 2 400
Glycerine 1 930 Q Quartz X Cut 5 740
I Ice 3 980 Quartz Fused 5 980
H Hi-Density Polyethelene 2 220 – 2 300 Rubber (Butyl) 1 900
        (Grey & White, Not Black) R Rubber (Soft) 1 480
M Methylene-Oxide 9 980 Rubber (Vulc.) 2 300
Monel 5 360 – 5 400 S Silicone Rubber 948
Motor Oil (SAE 30) 1 750 T Teflon 1 350 – 1 520
N Neoprene 1 600 W Water 1470
NB Note : This Schedule is only a Guide