ISO 683-4:2016给出了半成品（如大方坯、钢坯、板坯）、棒材和线材的交货技术要求，这些半成品由表2中列出的易切削钢制成，并按照表1第2至4行中针对不同类型产品给出的其中一种处理条件供应。 它涵盖了表2中列出的三组机械用易切削钢，即 a） 不用于热处理， b） 适用于表面硬化，以及 c） 适用于淬火和回火。 易切削钢常被用作亮条。有关这些产品，请参考ISO 683-18。 在特殊情况下，这些技术交付要求的变更或补充可在询价和订购时形成协议（见5.2和附件B）。 除ISO 683-4:2016外，ISO 404的一般技术交付要求也适用。

ISO 683-4:2016 gives the technical delivery requirements for semi-finished products (e.g. blooms, billets, slabs), bars and wire rod, manufactured from the free-cutting steels listed in Table 2 and supplied in one of the treatment conditions given for the different types of products in Table 1, rows 2 to 4. It covers three groups of free-cutting steels for mechanical purposes as listed in Table 2, namely a) not intended for heat treatment, b) suitable for case-hardening, and c) suitable for quenching and tempering. Free-cutting steels are often used as bright bars. For these products, refer to ISO 683？18. In special cases, variations in these technical delivery requirements or additions to them can form the subject of an agreement at the time of enquiry and order (see 5.2 and Annex B). In addition to ISO 683-4:2016, the general technical delivery requirements of ISO 404 are applicable.