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 |