Ferritic steels are developed economically alloyed with nickel (up to 7%) with increased strength and low-temperature toughness for the manufacture of liquefied natural gas (LNG) storage tanks. Results are provided for a study of the steel mechanical properties, cold resistance, and microstructure. It is shown that the achievement of a high level of cold resistance with a reduction in nickel content is possible by means of additional alloying with copper, microalloying with carbide-forming elements, and a change in heat treatment regime.

中文翻译：

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液化天然气储运船用特种耐寒经济合金镍铁素体钢的生产前景

铁素体钢采用经济的镍合金（高达 7%）开发，具有更高的强度和低温韧性，用于制造液化天然气 (LNG) 储罐。提供了用于研究钢的机械性能、耐寒性和微观结构的结果。结果表明，通过与铜进行额外合金化、与碳化物形成元素进行微合金化以及改变热处理制度，可以在降低镍含量的情况下实现高水平的耐寒性。