Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Quantification of the Post-Fire Strength Retention Factors for Selected Standard Duplex and Lean Duplex Stainless Steel Grades

Mariusz Maslak
* ORCID logo ,
Krzysztof Pancikiewicz
ORCID logo ,
Michal Pazdanowski
ORCID logo ,
Marek Stankiewicz
,
Piotr Wozniczka
,
Paulina Zajdel
Version 1 : Received: 4 December 2023 / Approved: 5 December 2023 / Online: 5 December 2023 (17:03:44 CET)

A peer-reviewed article of this Preprint also exists.

Maslak, M.; Pancikiewicz, K.; Pazdanowski, M.; Stankiewicz, M.; Wozniczka, P.; Zajdel, P. Quantification of the Post-Fire Strength Retention Factors for Selected Standard Duplex and Lean Duplex Stainless Steel Grades. Materials 2024, 17, 371. Maslak, M.; Pancikiewicz, K.; Pazdanowski, M.; Stankiewicz, M.; Wozniczka, P.; Zajdel, P. Quantification of the Post-Fire Strength Retention Factors for Selected Standard Duplex and Lean Duplex Stainless Steel Grades. Materials 2024, 17, 371.

Abstract

Experimental quantification of retention factors related to post-fire strength as well as post-fire ductility of intentionally selected stainless steel grades applied in construction is the objective of research presented here. These steel grades are characterized by a two-phase austenitic-ferritic microstructure of the duplex type. In this context two mutually corresponding chromium-nickel-molybdenum steel grades have been subjected to analysis, namely X2CrNiMoN22-5-3 steel belonging to the standard duplex group (DSS 22% Cr) and X2CrMnNiN21-5-1 steel belonging to the lean duplex group (LDSS). The similarities and differences in the mechanical properties exhibited by these steel grades after effective cooling, following more or less prolonged simulated fire action conforming to several development scenarios, have been identified and indicated. The resistance of given steel grade to permanent structural changes induced by the heating program proved to be the critical factor determining these properties and resulting in many cases in increased susceptibility to brittle fracture.

Keywords

stainless steel; standard duplex steel; lean duplex steel; post-fire strength; post-fire ductility; retention factors; recovery factors

Subject

Engineering, Civil Engineering

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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