Two Cases of High Alloy Austenitic Steel Failures | Zendy

Peter Bernasovský | Zendy; Annamária Petráňová | Zendy

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Two Cases of High Alloy Austenitic Steel Failures

Author(s) -

Peter Bernasovský,

Annamária Petráňová

Publication year - 2016

Publication title -

biuletyn instytutu spawalnictwa

Language(s) - English

Resource type - Journals

eISSN - 2300-1674

pISSN - 0867-583X

DOI - 10.17729/ebis.2016.5/7

Subject(s) - austenite , metallurgy , alloy , materials science , forensic engineering , engineering , microstructure

The article presents failures of structures made of austenitic steels. The first part is concerned with accelerated (centrifugally) cast tubes (φ 52.6 x 5.8 mm) made of steel 25-35 CrNi exposed to high temperature and severe reducing environment (ac >> 1). The second part of the article presents test results related to a water meter element and a cooling water pipeline made of austenitic steel. In both cases, a relatively short period of service was accompanied by the appearance of leaks. The tests revealed that the failures were triggered by microbiological corrosion caused by a sulphur reducing bacteria and not by the welding technology applied.

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