Use of Chromium-Manganese Corrosion-Resistant Steel in District Heating Network Applications

A fragment of a pipe from a chromium-manganese steel of type 12Kh15G9ND (AISI 201) is studied after 1.5 years of operation in an apartment building. The chemical composition of the steel is determined. The Vickers hardness of straight and curvilinear parts of the pipe is measured. The temperatures M...

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Bibliographic Details
Published in:Metal science and heat treatment 2023-07, Vol.65 (3-4), p.159-166
Main Authors: Sorokina, S. A., Vorob’ev, R. A., Gorshunov, M. G., Chernigin, M. A.
Format: Article
Language:English
Subjects:
Apartment buildings
Characterization and Evaluation of Materials
Chemical composition
Chemistry and Materials Science
Chromium manganese steels
Classical Mechanics
Corrosion
Corrosion resistance
Corrosion resistant steels
Diamond pyramid hardness
District heating
Engineering Thermodynamics
Heat and Mass Transfer
Macrostructure
Martensitic transformations
Materials Science
Metallic Materials
Network software
Nickel chromium steels
Nickel steel
Nickel steels
Pipes
Steel
Water supply
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Summary:A fragment of a pipe from a chromium-manganese steel of type 12Kh15G9ND (AISI 201) is studied after 1.5 years of operation in an apartment building. The chemical composition of the steel is determined. The Vickers hardness of straight and curvilinear parts of the pipe is measured. The temperatures M s and M d of martensitic transformations are computed. The macrostructure and the microstructure of the steel are studied. Places of through corrosion damage and causes of their formation in hot water supply (HWS) pipes are analyzed. A method of scratch testing is suggested for assessing the surface condition. The adhesive properties of the coating are estimated. It is inferred that steel 12Kh15G9ND is suitable for service in HWS systems and that total replacement of the chromium-nickel steel in pipelines by a chromium-manganese corrosion-resistant one requires further study.
ISSN:0026-0673
1573-8973
DOI:10.1007/s11041-023-00908-z