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Ultrasonic Thickness Gauges

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Ultrasonic Thickness Gauges…

…that measure through coatings.

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.
support
Material
Velocity- m/s
Velocity - in/µs
Aluminium
         Rolled
         Duraluminium
6200 - 6360
 6420
 6320
0.2441 - 0.2504
 0.2528
 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
5890 - 5960
 5900 approx.
0.2319 - 0.2346
 0.2323 approx.
Steel, Stainless
 10 Cr Ni 18 8, ann
5530 - 5790
 5530
0.2177 - 0.2280
 0.2177
Steel, Tool
 C105  Annealed
 C105  Hardened

 5940 - 5960
 5854

 0.2339 - 0.2346
 0.2305
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