ISO 9017 pdf download.Destructive tests on welds in metallic materials — Fracture test
1 Scope
This International standard specifies the sizes of test specimen and the procedures for carrying out fracture tests in order to obtain information about types, sizes and distribution of internal imperfections such as porosities, cracks, lack of fusion, lack of penetration and solid inclusions on the fracture surface. This International Standard applies to metallic materials in all forms of product with joints made by any fusion welding process with a thickness greater or equal to 2 mm.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 581 7:— 1 ) , Welding — Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) — Qualitylevels forimperfections. ISO 1 0042, Arc-weldedjoints in aluminium andits weldable alloys — Guidance on qualitylevels forimperfections. EN 970, Non-destructive examination offusion welds — Visualexamination.
3 Terms and definitions
For the purposes of this International Standard, the following terms and definitions apply. 3.1 examination length L f length of the test specimen measured along the weld axis between any side notches See Figure 6. 3.2 total examination length ?L f sum of the lengths of all the test specimens comprising the test piece, measured along the weld axis, of the fracture faces between the side notches of the test specimens See Figure 6.3.3 examination thickness a f thickness of the fracture area for each test specimen See Figures 7and 8. 3.4 examination area A f product of the examination length and the examination thickness for each test specimen 3.5 total examination area ?A f sum of all examination areas
4 Principle
Fracture the joint through the weld metal in order to examine the fracture surface. The fracture can be induced by bending or tension, static or dynamic loading. Furthermore, notch dimensions and temperature can be varied to induce the fracture. Unless otherwise specified, the test shall be carried out at ambient temperature (23 + 5) °C.
5 Symbols and abbreviated terms
The symbols and abbreviated terms to be used for fracture tests are specified in Table 1 and represented in Figures 5 to 8. Normally, it is sufficient to give the basic denomination, but for special applications, additional denominations about the notching and test method can be requested. EXAMPLE 1 Test specimen taken from a fillet weld with an examination length of 40 mm and examination thickness of 1 0 mm.
7 Removal of test specimens
7.1 General The examination length (L f ) and area (A f ), and the number of test specimens shall be specified by the application standard or by agreement between the contracting parties. Welded joints in plates shall be cut transversely to the welded joint in test specimens of approximately equal weld length. The weld axis shall remain in the middle of the test specimen for butt welds. For welded joints in pipe, unless otherwise specified in the application standard or by agreement between the contracting parties, the test piece shall provide at least two test specimens. When carrying outbend tests, equal numbers of specimens shall be tested with the root in tension and the face in tension. If the pipe diameter is too small for removing the required number of test specimens, additional test pieces shall be welded. 7.2 Marking Each test piece shall be marked to identify its exact location in the manufactured product or in the joints from which it has been removed. When removed from the test piece, each test specimen shall be marked.