Vol.26, Special Issue A, 2026, pp. S71–S74
https://doi.org/10.69644/ivk-2026-siA-0071

IMPACT TOUGHNESS OF SIMAXX 1000 STEEL WELDED JOINTS

Snežana Joksić1 , Ivica Čamagić1 , Aleksandar Sedmak2 , Bojan Medjo3 ,

Zijah Burzić4 , Shengwen Tu5 , Stefan Dikić3

1) University of Kosovska Mitrovica, Faculty of Technical Sciences, SERBIA

S. Joksić https://orcid.org/0009-0002-1909-2462 ; I. Čamagić https://orcid.org/0000-0003-4706-6333

2) University of Belgrade, Faculty of Mechanical Engineering, Belgrade, SERBIA

A. Sedmak https://orcid.org/0000-0002-5438-1895 , *email: asedmak@mas.bg.ac.rs

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

B. Medjo https://orcid.org/0000-0001-8100-7519 ; S. Dikić https://orcid.org/0000-0003-2700-0628

4) Society for Structural Integrity and Life ‘Prof. dr Stojan Sedmak’, Belgrade, SERBIA

Z. Burzić https://orcid.org/0000-0002-4759-9853

5) School of Chemical Engineering and Technology, Xi'an Jiaotong University, CHINA

S. Tu https://orcid.org/0000-0001-8735-5661

 

Abstract

The behaviour of welded joints of low-alloy steel with ultra-high strength SIMAXX 1000 steel at fracture due to impact load is analysed. For the impact test, an instrumented Charpy pendulum is used to separate the total energy into energy for the formation and energy of crack growth. Standard test specimens with a crack in the base metal (OM), heat affected zone (HAZ), and weld metal (MŠ) are used to determine the influence of the heterogeneous microstructure of the welded joint. The effect of low temperature down to –60 °C is also analysed to confirm that SIMAXX 1000 steel can also be used at low temperatures. Toward this aim the ductile-to-brittle transition temperature is determined.

Keywords: • SIMAX 1000 • impact toughness • welded joint zones • ductile-to-brittle transition temperature

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