PFINDER Reference Block No. 2

The reference test block no. 2 is used to check the penetrant testing process. It has a rectangular shape with the dimensions 155 mm x 50 mm x 2 mm and is made of stainless steel, which is coated with a nickel-chromium layer. One half was machined to achieve certain roughnesses. The other half contains five starshaped discontinuities, which are applied by hemispherical impressions with increasing force from the rear. The impression with the smallest load lies next to the area with the smallest roughness. The 4 areas with the different roughnesses are used to control the washing process. Four adjacent surfaces of the size 25 mm × 3 4mm were integrated on one side of the surface with the following roughnesses: Ra=2.5 μm, Ra=5 μm, Ra=10 μm and Ra=15 μm. For the use of UV-Radiation we recommend to wear the necessary protection equipment, e.g. UV safety glasses with 100 % UV-Filter.