Vol.26, No.1, 2026, pp. 3–7
https://doi.org/10.69644/ivk-2026-01-0003 

MECHANICAL AND METALLOGRAPHIC PROPERTIES OF STEEL NIOMOL 490K SAW-JOINT

Ana Maksimović1,* , Ljubica Milović2 , Bojana Zečević1 , Vujadin Aleksić3 , Goran Papić4

1) Innovation Centre of the Faculty of Technology and Metallurgy, Belgrade, SERBIA

A. Maksimović https://orcid.org/0000-0002-1984-7880 ; B. Zečević https://orcid.org/0000-0001-7622-1596

2) University of Belgrade, Faculty of Technology and Metallurgy, Belgrade, SERBIA

Lj. Milović https://orcid.org/0000-0001-9618-055X

3) Institute for Testing of Materials IMS, Belgrade, SERBIA

V. Aleksić https://orcid.org/0000-0002-6987-3438

4) Ph.D. student, University of Belgrade, Faculty of Mechanical Engineering, Belgrade, SERBIA

*email: aprodanovic@tmf.bg.ac.rs

 

Abstract

Bearing in mind the use of fine-grained micro alloyed steel NIOMOL 490K for welded structures exposed to impact loading at low temperatures, the mechanical and metallographic properties of its welded joint obtained by submerged arc welding (SAW), are examined. A filler metal, EPP 2NiMo2 Ø4 mm wire is used, in combination with OP 40 TT flux powder. The final aim of this research is to analyse the behaviour of welded joints under impact load at low temperatures in order to evaluate its fitness-to-service in real operating conditions.

Keywords: • welded joint • steel NIOMOL 490 • microstructure • hardness HV • impact toughness

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