ISO 3452-3-2013 pdf free download

ISO 3452-3-2013 pdf free download.Non-destructive testing — Penetrant testing — Part 3:Reference test blocks
Essais non destructifs — Exa men par ressuage — Partie 3: Pièces de référence.
3 Description of reference blocks
The Type 1 reference block consists of a set of four nickel-chrome plated panels with 10 pm, 20 lAm, 30 pm and 50 pm thickness of plating, respectively. The 10 pm, 20 pm, 30 pm and 50 pm panels can be used for determination of the sensitivity of fluorescent penetrant systems. The sensitivity of colour contrast penetrant systems Is determined using the 30 pm and 50 pm panels.
The Type 2 reference block consists of a single panel of which one half has been plated with electroless nickel and a thin layer of chromium and the other half prepared to achieve areas of specific roughness. The plated side exhibits five star-shaped discontinuities.
4 Type 1 reference block design and dimensions
The Type 1 panels are rectangular in shape with typical dimensions of 35 mm x 100 mm x 2 mm (see Eiire1). Each panel consists of a uniform layer of nickel-chromium plated on to a brass base, the thickness of nickel-chromium being 10 pm. 20 pm, 30 pm and 50 pm respectively. Transverse cracks are made in each panel by stretching the panels in the longitudinal direction. The width to depth ratio of each crack should be approximately 1:20.
5.1.2 Rinsabllity area
For checking the rinsability of penetrants, four adjacent areas sized 25 mm by 35 mm are produced down on one half of the test surface of the panel with roughnesses of Ra = 2,5 jim, Ra = 5 pm, Ra = 10 urn and Ra = 15 pm (see Figuie2).
The area with Ra = 2,5 pm may be produced by sand blasting and the other areas by electroerosion.
5.1.3 Defect area
5.1.3.1 General
The defect area is located on the other half of the test surface of the panel (see Figure 2).
5.1.3.2 PlatIng
A 60 pm ± 3 pm thickness of electroless nickel shall be plated on to the test surface of the panel to achieve a hardness value ranging from HV 0,2 = 500 to 600.
The nickel layer shall be plated with a thin layer of hard chromium of 0,5 pm to 1,5 pm thickness. The panel shall then be heat treated to achieve a hardness value ranging from HV 0,3 = 900 to 1 000 by, for example, heating at 405 °C for 70 mm. The roughness R4 o the chromium plating shall be 1,2 pm to 1,6 jim.
5.1.3.3 Artificial defect production
Five equidistant indentations shall be made under loads typically in the range 2 kN to 8 kN on the
reverse side of the test surface (plated area).
For example, the production of the five artificial defects may be made using the following Table 1.ISO 3452-3-2013 pdf free download.