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- Title
Use of Chromium-Manganese Corrosion-Resistant Steel in District Heating Network Applications.
- Authors
Sorokina, S. A.; Vorob'ev, R. A.; Gorshunov, M. G.; Chernigin, M. A.
- Abstract
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 Ms and Md 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.
- Subjects
HOT-water supply; CHROME-nickel steel; STEEL; MARTENSITIC transformations; VICKERS hardness
- Publication
Metal Science & Heat Treatment, 2023, Vol 65, Issue 3/4, p159
- ISSN
0026-0673
- Publication type
Article
- DOI
10.1007/s11041-023-00908-z