Structure and Properties of New High-Strength Steels Produced by PAO Severstal’ for Arctic Structures

• Published in: Metallurgist (New York) 2023-03, Vol.66 (11-12), p.1344-1359
• Main Authors: Sych, O. V., Korotovskaya, S. V., Khlusova, E. I., Golubeva, M. V., Popkov, A. G., Yashina, E. A.
• Format: Article
• Language: English
• Subjects: Alloys; Analysis; Base metal; Boron steel; Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion and anti-corrosives; Corrosion resistance; Crack propagation; Heat affected zone; High strength steels; Low alloy steels; Low temperature resistance; Materials Science; Mechanical properties; Metallic Materials; Operating temperature; Steel alloys; Steel, High strength; Underwater construction; Yield strength
• ISSN: 0026-0894; 1573-8892
• DOI: 10.1007/s11015-023-01450-2

Results are provided for determining standard mechanical properties, cold resistance, and crack resistance properties of base metal and a heat-affected zone, and corrosion-mechanical strength of new cold-resistant steels with yield strength of at least 420, 460, 890 and 960 MPa. Results are given for studying ferritic-bainitic and bainitic-martensitic parameters of the structure of sheets from low- and sparingly-alloyed high-strength steels of various thicknesses. The low-alloy steel developed with a yield strength of at least 420 and 460 MPa with the code Arc may be used for any components of marine Arctic structures without restriction at operating temperatures down to –40°C. The high-strength steel with a yield strength of at least 890 and 960 MPa is recommended as a promising material for constructing underwater mining complexes and deep-water marine equipment.