Development of hot rolled coils in S355J2+N grade with Si content <0.03% on Zelezara Smederevo hot strip mill

Authors

  • Milić Ječmenica
  • Radovan Stefanović
  • Goran Vukićević

DOI:

https://doi.org/10.30544/79

Keywords:

normalizing rolling, microalloying, Nb, hot-rolled coils

Abstract

Because of suitability for hot-dip zinc-coating, there is some concern about the use low silicon (Si) content in normalized or normalizing rolling S355J2+N structural steel with minimum specified yield strength of 355 MPa. However, decreasing Si content leads to a decrease of solid solution hardening, whereas decrease in strength should be compensated by alternative mechanism. One possible solution is the use of microalloying with niobium (Nb). Based on available results obtained on own and competitive material, we projected and produced S355J2+N hot-rolled coils (HRC). The results show that the produced material fully satisfies the requirements of the EN 10025-2/2004 quality standard. Furthermore, strength values in normalized conditions were lower than those in normalizing rolling condition.

References

EUROPEAN STANDARD EN 10025-2:2004, ICS 77.140.10; 77.140.45; 77.140.50, Management Centre: rue de Stassart, 36 B-1050 Brussels, 7.

Vereinbarung zur Begutachtung von Erzeugnissen (Band, Blech, Breitflachstahl), die mit geregelter Temperaturführung beim und nach dem Walzen hergestellt werden, zum Nachweis der Gleichwertigkeit mit dem Normalglühen. VdTÃœV-Merkblatt Werkstoffe, 3.76 (1976) 1263.

L.Meyer,Microalloying'95, Pittsburgh, ISS 1995, 35.

Antonio Augusto Gorni and Marcos Roberto Soares da Silva, 50th Rolling Seminar - Processes, Rolled and Coated Products, Associação Brasileira de Metalurgia, Materiais e Mineração, Ouro Preto, November 18 to 21, 2013.

G.Vukićević, N.Radović, D.Jeremić, Dj.Drobnjak, Mathematical Modelling of Mechanical Properties of Microalloyed Hot Strip, Proceedings of the Int.Conf on Thermomechanical Processing: Mechanics, Microstructure & Control, Eds. E.J.Palmiere, M.Mahfouf and J.Beynon, 23-26 June 2002 Sheffield , University of Sheffield, 413-417.

G.Vukićević, Mathematical Modelling of Mechanical Properties of Plain Carbon Hot Rolled Strips, unpublished research, ŽELEZARA SMEDEREVO d.o.o, 2002.

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Published

2025-04-01

How to Cite

Ječmenica, Milić, Radovan Stefanović, and Goran Vukićević. 2025. “Development of Hot Rolled Coils in S355J2+N Grade With Si Content <0.03% on Zelezara Smederevo Hot Strip Mill”. Metallurgical and Materials Engineering 21 (3):183-94. https://doi.org/10.30544/79.

Issue

Vol. 21 No. 3 (2015)

Section

Articles - archived

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