本文件规定了高屈服强度合金特殊钢扁平产品的交货技术条件。表1-3（化学成分）和表4-6（机械性能）给出了等级和质量，并在淬火和回火条件下提供。本文件中规定的钢适用于在S460、S500、S550、S620和S690等级的最小标称厚度为3毫米和最大标称厚度为200 mm的热轧扁平产品中，在淬火和回火后的钢中，S890和S960级的最大名义厚度为125毫米。规定的最小屈服强度为460兆帕至960兆帕。

This document specifies technical delivery conditions for flat products of high yield strength alloy special steels. The grades and qualities are given in Tables 1 to 3 (chemical composition) and Tables 4 to 6 (mechanical properties) and are supplied in the quenched and tempered condition. The steels specified in this document are applicable to hot-rolled flat products with a minimum nominal thickness of 3 mm and a maximum nominal thickness of 200 mm for grades S460, S500, S550, S620 and S690, a maximum nominal thickness of 125 mm for grades S890 and S960, in steels which, after quenching and tempering, have a specified minimum yield strength of 460 MPa to 960 MPa.