This study has been conducted to establish a relation between welding quality and
strength in various types of steel. This because specification of quality levels higher
or lower than required leads to an increase in manufacturing cost.
A procedure has been developed to achieve the above objective. In this procedure
EN 25817, EN 288-1 and similar welding and nondestructive testing standards have
been taken as a basis. Furthermore, effort has been exerted to ensure that welding is
performed in a manner that reflects the actual conditions encountered in the industry
to the extent possible. The same principles have been pursued in material selection,
and the materials have been selected from the low-carbon manufacturing steel types
(St37, St44 and St52) that are frequently used in steel construction, boiler
manufacturing and similar manufacturing areas.
The welded pieces manufactured in accordance with the established procedure have
been tested through radiographic and ultrasonic examination methods to check
whether they conformed to the welding quality standards set in the procedure.
v
Quality levels B and C of the EN 25817 standard have been selected for this study.
The sizes of potential defects of quality levels have been defined within this
standard. In this study, plates with weld seam that has no defect have been used for
Quality level B and plates with weld seam having gas pores in sizes specified in the
relevant standard have been used for Quality level C.
After this stage, the pieces have been subjected to mechanical tests and their strength
values have been identified. Thereby, the association between welding quality and
strength has been established, enabling us to specify which strength values can be
achieved in specific welding quality levels.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/2/12605572/index.pdf |
| Date | 01 December 2004 |
| Creators | Soylu, Osman Alper |
| Contributors | Doyum, A. Bulent |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for METU campus |
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