ndt
Ultrasonic Thickness Gauges
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The given values are in certain cases strongly dependent on the alloy, heat treatment, manufacturing and processing and are therefore only approximate standard values. They are given here as a guide only.
Material
Velocity- m/s
Velocity - in/µs
Aluminium
Rolled
Duraluminium
Rolled
Duraluminium
6200 - 6360
6420
6320
6320
0.2441 - 0.2504
0.2528
0.2488
0.2488
Bronze (5%P)
3531
0.1390
Copper
3666 - 4760
0.1443 - 0.1874
Glass, plate
5766
0.2270
Inconel, forged
7820
0.3079
Lead
2050 - 2400
0.0807 - 0.0945
Steel, Mild
Supplied test block
Supplied test block
5890 - 5960
5900 approx.
0.2319 - 0.2346
0.2323 approx.
Steel, Stainless
10 Cr Ni 18 8, ann
10 Cr Ni 18 8, ann
5530 - 5790
5530
0.2177 - 0.2280
0.2177
Steel, Tool
C105 Annealed
C105 Hardened
C105 Annealed
C105 Hardened
5940 -
0.2339 -
Tin
3210 - 3320
0.1264 - 0.1307
Titanium
5823 - 6260
0.2293 - 0.2465
Zinc
3890 - 4210
0.1531 - 0.1657
Reference: Mathies, Klaus (1998), Thickness measurement with Ultrasound, Berlin:German Society of nondestructive testing.
velocity table