结构钢 第3部分:细晶粒结构钢交货技术条件

[中文适用范围]： 本文件规定了热轧可焊细晶粒结构钢扁材和长材产品在轧制（仅适用于 SG 钢种）、正火/正火轧制和热机械加工交货条件下的要求。 它适用于可逆轧机轧制的钢板、宽扁钢、热轧型材和棒材，用于焊接或螺栓结构的重载部件。 本文件涵盖 13 个等级和 6 个品质。 附录 A 涵盖了 S275、S355、S390、S420、S460 和 S500 等级。 附件 B 涵盖了 SG245、SG290、SG325、SG345、SG365、SG415 和 SG460 等级。 并非所有等级都提供所有品质，并且某些品质有夏比 V 型缺口要求。 本文件规定的钢材适用于 S275N、S355N、S390N、S420N 和 S460N 牌号的热轧板材、宽扁钢、型材和棒材，最小公称厚度为 3 mm，最大公称厚度为 250 mm。 S275M、S355M、S390M、S420M、S460M 和 S500M 等级的标称厚度为 150 mm，SG245、SG325 和 SG415 等级的最大标称厚度为 200 mm，SG345、SG365 和 SG460 等级的最大标称厚度为 100 mm， SG290 级的最大标称厚度为 40 毫米。 本文件不包括以下结构钢，其中一些由其他国际标准涵盖： ——薄板和带材 — 参见 ISO TC 17/SC 12，连续轧机扁轧产品； ——管材产品 — 参见 ISO TC 5/SC 1，钢管。 注 1：ISO/TC 17/SC 12 和 ISO/TC 5/SC 1 涵盖的标准列表可在 ISO 网站上获取。 注 2：在 ISO 630 的所有部分中，术语“厚度”均被视为“标称厚度”，除非另有说明。 [外文原描述]： This document specifies requirements for flat and long products of hot-rolled weldable fine-grain structural steels in the as-rolled (for SG grades only), normalized/normalized rolled and thermomechanical processed delivery conditions. It applies to steel plates rolled on a reversing mill, wide flats, hot-rolled sections and bars, which are intended for use in heavily loaded parts of welded or bolted structures. This document covers 13 grades and 6 qualities. Grades S275, S355, S390, S420, S460 and S500 are covered in Annex A. Grades SG245, SG290, SG325, SG345, SG365, SG415 and SG460 are covered in Annex B. Not all grades are available in all qualities, and some qualities have Charpy V-notch requirements. The steels specified in this document are applicable to hot-rolled plates, wide flats, sections and bars with a minimum nominal thickness of 3 mm and a maximum nominal thickness of 250 mm for grades S275N, S355N, S390N, S420N and S460N, a maximum nominal thickness of 150 mm for grades S275M, S355M, S390M, S420M, S460M, and S500M, a maximum nominal thickness of 200 mm for grades SG245, SG325 and SG415, a maximum nominal thickness of 100 mm for grades SG345, SG365 and SG460, and a maximum nominal thickness of 40 mm for grade SG290. This document does not include the following structural steels, some of which are covered by other International Standards: — Sheet and strip — refer to ISO TC 17/SC 12, Continuous mill flat rolled products ; — Tubular products — refer to ISO TC 5/SC 1, Steel tubes . NOTE 1 Lists of standards covered by ISO/TC 17/SC 12 and ISO/TC 5/SC 1 are available on the ISO website. NOTE 2 In all parts of ISO 630, the term of "thickness" is considered as "nominal thickness", unless otherwise stated.