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.

提供的结果用于确定母材和热影响区的标准机械性能、耐寒性和抗裂性能，以及屈服强度至少为 420、460、890 和 960 的新型耐寒钢的腐蚀机械强度兆帕。给出了研究各种厚度的低和稀合金高强度钢板材结构的铁素体-贝氏体和贝氏体-马氏体参数的结果。开发的屈服强度至少为 420 和 460 MPa 且代码为 Arc 的低合金钢可用于北极海洋结构的任何部件，在低至 –40°C 的工作温度下不受限制。