定 义 室温使用态组织为针状铁素体或针状铁素体与等轴铁素体混合物的低碳或超低碳低合金钢。
采用针状铁素体的管线钢具有较好的成形性能。
Pipeline steel adopting the spicular ferrite owns the better properties of forming.
鉴于针状铁素体型管道钢具有优异的综合性能，重要高压输气管道应采用针状铁素体管道钢。
The acicular ferrite pipeline steels have the excellent comprehensive properties and should be used for the key high-pressure gas transmitting pipelines.
钢的组织主要由针状铁素体和马氏体两相组成。
Mainly its metallographic structure consists of acicular ferrite and martensite.
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