AS ISO 3452.3 pdf download

AS ISO 3452.3 pdf download.Non-destructive testing — Penetrant testing
1 Scope
This International Standard describes two types of reference blocks: 一Type 1 reference blocks are used to determine the sensitivity levels of both fluorescent and colour contrast penetrant product families; . 一 Type 2 reference blocks are used for routine assessment of the performance of both fluorescent and colour contrast penetrant testing. The reference blocks are to be used in accordance with part 1 of this International Standard.
2 Normative references
The following referenced documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10088-1, Stainless steels一Part 1: List ofstandard stainless steels EN 10204, Metallic products一Types of inspection documents ISO 4957, Tool steels ISO 10474, Steel and steel products一Inspection documents ISO 15510, Stainless steels – Chemical composition
3 Description of reference blocks
The Type 1 reference block consists of a set of four nickel-chrome plated panels with 10 μm, 20 μm, 30 μum and 50 μum thickness of plating, respectively. The 10 μm, 20 μm, 30 μm and 50 μm 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 μm and 50 μum 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 mmx 2 mm (see Figure 1). Each panel consists of a uniform layer of nickel-chromium plated on to a brass base, the thickness of nickel-chromium being 10 μm, 20 μm, 30 μm and 50 μm 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 Rinsability 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= 2,5μm, Ra=5 um, Ra= 10 μm and Ra= 15 μm (see Figure 2). The area with Ra = 2,5 μm 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 μm土3 μm 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 μm to 1,5 μm 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 min. The roughness Ra of the chromium plating shall be 1,2 μm to 1,6 μm. 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. The indentations for artificial defect production are made using a compression machine (120 kN capacity) or an appropriate Vickers hardness machine fitted with a hemispherical indentor. Details of the specific indentor are given in Figure 3. The indentations are made using a speed loading of 0,05 kN/s and a speed unloading of 0,5 kN/s with continuous application of the load.