本文件规定了提高耐大气腐蚀性的结构质量热轧钢板的要求，也称为耐候结构钢。它是按表1所列的等级和等级生产的。该产品适用于对机械性能和耐大气腐蚀性有要求的应用场合。通常在交付状态下使用，用于螺栓连接、铆接或焊接结构。 本文件不适用于以下钢材质量: -锅炉和压力容器用钢，以及指定为商业质量和图纸质量的钢（见ISO 3573）； -在可逆式磨机上生产的钢，具有更好的耐大气腐蚀性（见ISO 630）- 5); -具有结构质量（见ISO 4995）和高屈服强度结构质量（见ISO 4996）的钢材； -具有更高屈服强度和更高成形性的钢材（见ISO 5951）。

This document specifies requirements for steel sheet hot-rolled of structural quality with improved atmospheric corrosion resistance, also known as weather-resistant structural steel. It is produced in the grades and classes listed in Table 1. The product is intended for applications where requirements are for mechanical properties and increased resistance to atmospheric corrosion. It is generally used in the delivered condition and is intended for bolted, riveted or welded structures. This document does not apply to the following steel qualities: — steels intended for boilers and pressure vessels, and steels designated as commercial quality and drawing qualities (see ISO 3573); — steels produced on reversing mills and designated with improved atmospheric corrosion resistance (see ISO 630-5); — steels designated with structural quality (see ISO 4995), and high yield strength structural quality (see ISO 4996); — steels designated with higher yield strength with improved formability (see ISO 5951).