Tabla de velocidades de materiales predefinidosTabla de velocidades para los 39 materiales predefinidos en MTG4, MTG6, MTG8, PTG6 y PTG8.

Número de material de Elcometer

Descripción del material

(Símbolo/grupo químico)

Nombre del material

Velocidad del sonido

(m/sec)

Velocidad del sonido

(in/μsec)

Fuente del valor

NPL = National Physics Laboratory

ASNT = The American Society

for Non destructive Testing

Sector = conocimiento del

sector1 Fe Hierro (dulce) 5960 0.235 NPL

2 FeFundición de

hierro4990 0.196 NPL

3 AlAluminio (7075-T6)

6350 0.250 ASNT

4 Ti Titanio 6100 0.240 ASNT5 Mg Magnesio 5790 0.228 ASNT6 Ni Níquel 5630 0.222 ASNT7 W Wolframio 5180 0.204 ASNT8 Cu Cobre 4660 0.183 ASNT9 Zn Cinc 4190 0.165 NPL10 Ag Plata 3600 0.142 Sector11 Sn Estaño 3380 0.133 NPL12 Pt Platino 3260 0.128 NPL13 Au Oro 3240 0.128 NPL14 Cd Cadmio 2780 0.109 NPL15 Bi Bismuto 2180 0.086 Sector16 Pb Plomo 2160 0.085 ASNT

17Aleación de

cobalto-cromoEstelite 6990 0.275 Sector

18Aleación de

hierro

Acero (Carbono

1018)5920 0.233 Sector

19Aleación de

hierro

Acero (Aleación

4340)5850 0.230 Sector

20Aleación de

níquel-cromoInconel (625) 5820 0.229 Sector

21 Aleación de

plata

Acero inoxidable, (Austenita

304)

5660 0.233 ASNT

22Aleación de

cobreConstantán 5180 0.204 NPL

23 No metal Alpaca 4760 0.187 Sector24 No metal Latón (Naval) 4430 0.174 ASNT

25 No metalVidrio

(Cuarzo)5930 0.233 ASNT

26 No metalVidrio

(Crown)5660 0.223 NPL

27 No metal Vidrio (Flint) 5260 0.207 NPL28 No metal Porcelana 5840 0.230 Sector29 No metal Plexiglas 2760 0.109 Sector30 No metal Fibra de vidrio 2740 0.108 Sector31 No metal Nailon 2680 0.106 NPL32 No metal Resina epoxi 2540 0.100 Sector33 No metal Poliestireno 2350 0.093 NPL34 No metal PVC 2330 0.092 NPL35 No metal Goma (Butil) 1830 0.072 Sector

36 No metalGoma

(Natural)1600 0.063 NPL

37 No metal Poliuretano 1780 0.070 Sector38 No metal Teflón 1400 0.055 NPL39 No metal Agua 1490 0.059 ASNT

Material Sound Velocities

The table below lists typical longitudinal wave ultrasonic velocities in a variety of common materials that can be

measured with ultrasonic thickness gages. Note that this is only a general guide. The actual velocity in these

materials may vary significantly due to a variety of causes such as specific composition or microstructure, grain

or fiber orientation, porosity, and temperature. This is especially true in the case of cast metals, fiberglass,

plastics, and composites. For best accuracy in thickness gaging, the sound velocity in a given test material

should always be measured by performing a velocity calibration on a sample of known thickness.

Ultrasonic Velocities in Common Materials

Material V (in./µsec) V (m/sec)

Acrylic (Perspex) 0.1070 2730

Aluminum 0.2490 6320

Beryllium 0.5080 12900

Brass 0.1740 4430

Composite,

graphite/epoxy

0.1200 3070

Copper 0.1830 4660

Diamond 0.7090 18000

Fiberglass 0.1080 2740

Glycerin 0.0760 1920

Inconel® 0.2290 5820

Iron, Cast (soft) 0.1380 3500

Iron, Cast (hard) 0.2200 5600

Iron oxide (magnetite) 0.2320 5890

Lead 0.0850 2160

Lucite® 0.1060 2680

Molybdenum 0.2460 6250

Motor oil 0.0690 1740

Nickel, pure 0.2220 5630

Polyamide 0.0870 2200

Nylon 0.1020 2600

Polyethylene,

high density (HDPE)

0.0970 2460

Polyethylene,

low density (LDPE)

0.0820 2080

Polystyrene 0.0920 2340

Polyvinylchloride, (PVC) 0.0940 2395

Rubber, polybutadiene 0.0630 1610

Silicon 0.3790 9620

Silicone 0.0580 1485

Steel, 1020 0.2320 5890

Steel, 4340 0.2300 5850

Steel, 302 austenitic stainless 0.2260 5740

Tin 0.1310 3320

Titanium 0.2400 6100

Tungsten 0.2040 5180

Water (20°C) 0.0580 1480

Zinc 0.1640 4170

Zirconium 0.1830 4650