Elcometer 207 Operating Instruction page 46

Material
Lead
Magnesium
Mercury
Nickel
Nylon
Paraffin
Platinum
Plexiglas
Polystyrene
Porcelain
PVC
Quartz Glass
Rubber, Vulcanised
Silver
Steel
Steel, Stainless
Stellite
Teflon
Tin
Titanium
Tungsten
Water
Zinc
44
Sound-velocity (m/s)
2159
5791
1448
5639
2591
2210
3962
2692
2337
5842
2388
5639
2311
3607
5918
5664
6985
1422
3327
6096
5334
1473
4216
Sound-velocity (in/µs)
0.085
0.228
0.057
0.222
0.102 (Approximate)
0.087
0.156
0.106
0.092
0.230 (Approximate)
0.094
0.222
0.091
0.142
0.233
0.223
0.275 (Approximate)
0.056
0.131
0.240
0.210
0.058
0.166