3-Notch Surface Defect Calibration Standard
This common standard contains three (3) surface notches at depths of 0.008″, 0.020″ and 0.040″.
Notch width typically 0.004″ to 0.005″ with other widths possible. Optional notch #4 is a 0.030″ by 0.030″ 45° corner notch (not pictured on sketch). Materials offered include 7075-T6 Aluminium, AISI 4340 Steel, Type 304 Stainless Steel, 6AI-4V Titanium, Inconel 600, Inconel 625, Inconel 690 and others. Notch depths are machine engraved on one edge: serial number and alloy on the other. NIST traceable. Block dimensions: 3.0″ x 1.0″ x .25″. In accordance with PH Drawing No. 10075.