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2023 №02 (05) DOI of Article
2023 №02 (07)

Automatic Welding 2023 #02
Avtomaticheskaya Svarka (Automatic Welding), #2, 2023, pp. 40-45

Recommendations on weldability testing at certification of shipbuilding steel production

O.M. Kostin

Admiral Makarov National University of Shipbuilding. 9 Heroiv Ukrainy Ave. 54025, Mykolaiv, Ukraine. E-mail: kostin.weld@gmail.com

Recommendations on selection of welding consumables for weldability tests at certification of production of rolled sheets from higher-strength shipbuilding steels were elaborated. It is shown that the certified welding consumables do not ensure the claimed category impact toughness values of weld metal at increase of welding heat input up to 5.0 kJ/mm which is related to critical dendrite growth, dependent on thermal impact. In this connection, in order to obtain guaranteed positive results, the control welded joints should be regarded as particularly critical structures, which allows, in keeping with the Classification Society Rules (Lloyd Register – LR, Veritas Bureau – BV, etc.), specifying the use of combinations of welding consumables, being one category higher than the optimal one, for instance, 4Y instead of 3Y or 5Y40 instead of 4Y40. 11 Ref., 1 Tabl., 4 Fig.
Keywords: production certification, shipbuilding steelsі, welded joints, welding consumables, weldability tests

Received: 02.01.2023


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