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Proceedings of ABM Annual Congress

ISSN 2594-5327

61º Congresso Anual da ABM — vol. 61, num.61 (2006)

Title

SLOW STRAIN RATE TENSILE TESTS ON HP-40 AUSTENITIC STAINLESS STEEL

SLOW STRAIN RATE TENSILE TESTS ON HP-40 AUSTENITIC STAINLESS STEEL

Authorship

Pérusin, Simon; Peraldi, Raphaëlle; Lacaze, Jacques; Filho, Jader Ferreira Furtado; Andrieu, Eric

Pérusin, Simon
Pérusin, Simon

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Peraldi, Raphaëlle
Peraldi, Raphaëlle

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Lacaze, Jacques
Lacaze, Jacques

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Filho, Jader Ferreira Furtado
Filho, Jader Ferreira Furtado

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Andrieu, Eric
Andrieu, Eric

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DOI

10.5151/2594-5327-0288

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Abstract

HP-40 austenitic stainless steel alloyed with Nb is presently used as material for reformer tubes that are manufactured by centrifugation. The as-cast microstructure consists of a dendritic matrix delineated by a network of NbC and M7C3 carbide types. While this carbide network helps improving creep resistance during normal service, experiments performed during the present study showed it to be detrimental in case of slow strain rate tensile tests at higher temperature. This suggests that this material can hardly support non-uniform loadings such as those building up during temperature overshoots in service. This could possibly explain short term failures of tubes in reforming plants as repeatedly reported in the literature.

 

HP-40 austenitic stainless steel alloyed with Nb is presently used as material for reformer tubes that are manufactured by centrifugation. The as-cast microstructure consists of a dendritic matrix delineated by a network of NbC and M7C3 carbide types. While this carbide network helps improving creep resistance during normal service, experiments performed during the present study showed it to be detrimental in case of slow strain rate tensile tests at higher temperature. This suggests that this material can hardly support non-uniform loadings such as those building up during temperature overshoots in service. This could possibly explain short term failures of tubes in reforming plants as repeatedly reported in the literature.

Keywords

HP-40 stainless steel; Slow strain rate tensile tests; Chromium carbides; Niobium carbides; Cracks

HP-40 stainless steel; Slow strain rate tensile tests; Chromium carbides; Niobium carbides; Cracks

How to refer

Pérusin, Simon; Peraldi, Raphaëlle; Lacaze, Jacques; Filho, Jader Ferreira Furtado; Andrieu, Eric. SLOW STRAIN RATE TENSILE TESTS ON HP-40 AUSTENITIC STAINLESS STEEL , p. 2554-2563. In: 61º Congresso Anual da ABM, Rio de Janeiro, 2006.
ISSN: 2594-5327 , DOI 10.5151/2594-5327-0288