本文件规定了结构质量和高强度钢的热轧双辊铸轧钢板的要求。 该产品适用于需要特定机械性能的应用场合。它通常在交付状态下使用，用于螺栓连接、铆接或焊接结构，在宽带轧机上生产，而不是在中厚板轧机上生产。 结构质量双辊铸轧钢板是一种按规定机械性能生产的碳钢，有多种等级可供选择。 经微合金强化的高强度热轧双辊铸轧钢板可生产出规定的机械性能，并有多种等级。

This document specifies the requirements for hot-rolled twin-roll cast steel sheet of structural quality and high strength steel. The product is intended for applications where specific mechanical properties are required. It is generally used in the delivered condition and is intended for bolted, riveted or welded structures, and it is produced on a wide strip mill, not a plate mill. Structural quality twin-roll cast steel sheet is a carbon steel produced to specified mechanical properties and is available in a number of grades. High strength hot-rolled twin-roll cast steel sheet, strengthened by microalloys is produced to specified mechanical properties and is available in a number of grades and classes.