关键词: 极地船舶, 低温环境, 船体钢级, 极地船级

Abstract: The selection of structural materials is a critical aspect in the design of ships operating in polar low-temperature environments. Currently, the requirements of relevant rules from different classification societies exhibit both similarities and differences. The lack of a unified definition for the design temperature poses significant challenges in the selection of hull steels for polar service. Through a systematic review of the rules pertaining to material selection for hull structures in polar low-temperature environments, and based on differences in their foundational principles and definitions of design temperature, these rules can be categorized into three main types: IACS Unified Requirement S6 (UR S6) along with the winterization rules of classification societies, the POLAR CLASS (PC) rules and the rules of the Russian Maritime Register of Shipping (RMRS). This paper conducts a comparative analysis of the differences among these three categories of rules, covering aspects such as the scope of application, design temperature, and steel grade selection. Valuable conclusions and suggestions are summarized, which are expected to provide a reference for the selection of hull steels in polar low-temperature environments.

Key words: polar ship, low-temperature environment, hull steel grade, POLAR CLASS