结构质量的冷还原碳钢板

[中文适用范围]： 本文件适用于结构用冷成型碳钢板材，牌号为CR220、CR250、CR280、CR320和CH550，通常不使用微合金化元素。该产品适用于需要 bolts、铆接和焊接的结构。 通常用于 fabrication 的交付状态，例如弯曲、成形和焊接。本文件不包括商业质量或拉伸质量钢（参见 ISO 3574），按硬度要求冷成型碳钢板材（参见 IS0 5954），高强度且改善成形性的冷成型钢板材（参见 IS0 13887）或高屈服强度和低抗拉强度的冷成型钢板材（参见 IS014590）。 [外文原描述]： This document applies to cold-reduced carbon steel sheet of structural quality in grades CR220, CR250, CR280, CR320, and CH550, usually without the use of microalloying elements. The product is intended for structures that include bolting, riveting, and welding. It is generally used in the delivered condition for fabricating purposes, such as bending, forming, and welding. This document does not cover steels designated as commercial quality or drawing qualities (covered in ISO 3574), cold-reduced carbon steel sheet according to hardness requirements (covered in ISO 5954), cold-reduced steel sheet of higher strength with improved formability (covered in ISO 13887), or cold-reduced steel sheet of high tensile strength and low yield point with improved formability (covered in ISO14590).