Select appropriate UT calibration block based on material thickness, test frequency, and applicable code requirements
Input Parameters
Results
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IIW Block Recommendation
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DSC Block Thickness Range
in
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Near Field Length (N)
in
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Wavelength (lambda)
in
Note: Calibration blocks per ASTM E164 and applicable welding codes. Always verify velocity on actual test material. IIW Type 1 (V1) per BS 2704 / ISO 2400.
Reference
Wavelength: lambda = V / f
Near Field: N = D^2 / (4 x lambda)
V_steel_L = 0.2320 in/us, V_stainless_L = 0.2260 in/us, V_aluminum_L = 0.2480 in/us
DSC block should bracket the test material thickness range.