Velocity chart for the preset choice of 39 materials in the Elcometer MTG and PTG.
Elcometer Material Number | Material Description (Chemical Symbol/Grouping) | Material Name | Sound Velocity (m/sec) | Sound Velocity (in/μsec) | Source of value NPL = National Physical Laboratory ASNT = The American Society for Non destructive testing Industry = Industry knowledge |
| 1 | Fe | Iron (soft) | 5960 | 0.235 | NPL |
| 2 | Fe | Iron Cast | 4990 | 0.196 | NPL |
| 3 | Al | Aluminium (7075-T6) | 6350 | 0.250 | ASNT |
| 4 | Ti | Titanium | 6100 | 0.240 | ASNT |
| 5 | Mg | Magnesium | 5790 | 0.228 | ASNT |
| 6 | Ni | Nickel | 5630 | 0.222 | ASNT |
| 7 | W | Tungsten | 5180 | 0.204 | ASNT |
| 8 | Cu | Copper | 4660 | 0.183 | ASNT |
| 9 | Zn | Zinc | 4190 | 0.165 | NPL |
| 10 | Ag | Silver | 3600 | 0.142 | Industry |
| 11 | Sn | Tin | 3380 | 0.133 | NPL |
| 12 | Pt | Platinum | 3260 | 0.128 | NPL |
| 13 | Au | Gold | 3240 | 0.128 | NPL |
| 14 | Cd | Cadmium | 2780 | 0.109 | NPL |
| 15 | Bi | Bismuth | 2180 | 0.086 | Industry |
| 16 | Pb | Lead | 2160 | 0.085 | ASNT |
| 17 | Cobalt-chromium Alloy | Stellite | 6990 | 0.275 | Industry |
| 18 | Iron Alloy | Steel (Carbon 1018) | 5920 | 0.233 | Industry |
| 19 | Iron Alloy | Steel (Alloy 4340) | 5850 | 0.230 | Industry |
| 20 | Nickel-chromium Alloy | Inconel (625) | 5820 | 0.229 | Industry |
| 21 | Silver Alloy | Stainless Steel, (Austentic 304) | 5660 | 0.233 | ASNT |
| 22 | Copper Alloy | Constantan | 5180 | 0.204 | NPL |
| 23 | Non-metal | German Silver | 4760 | 0.187 | Industry |
| 24 | Non-metal | Brass (Naval) | 4430 | 0.174 | ASNT |
| 25 | Non-metal | Glass (Quartz) | 5930 | 0.233 | ASNT |
| 26 | Non-metal | Glass (Crown) | 5660 | 0.223 | NPL |
| 27 | Non-metal | Glass (Flint) | 5260 | 0.207 | NPL |
| 28 | Non-metal | Porcelain | 5840 | 0.230 | Industry |
| 29 | Non-metal | Plexiglas | 2760 | 0.109 | Industry |
| 30 | Non-metal | Glass Fibre | 2740 | 0.108 | Industry |
| 31 | Non-metal | Nylon | 2680 | 0.106 | NPL |
| 32 | Non-metal | Epoxy Resin | 2540 | 0.100 | Industry |
| 33 | Non-metal | Polystyrene | 2350 | 0.093 | NPL |
| 34 | Non-metal | PVC | 2330 | 0.092 | NPL |
| 35 | Non-metal | Rubber (Butyl) | 1830 | 0.072 | Industry |
| 36 | Non-metal | Rubber (Natural) | 1600 | 0.063 | NPL |
| 37 | Non-metal | Polyurethane | 1780 | 0.070 | Industry |
| 38 | Non-metal | Teflon | 1400 | 0.055 | NPL |
| 39 | Non-metal | Water | 1490 | 0.059 | ASNT |