EVS-EN ISO 683-5:2021

This document gives the technical delivery requirements for
—  semi-finished products, e.g. blooms, billets, slabs (see note 1),
—  bars (see note 1),
—  wire rod,
—  hot-rolled plates (see note 2), and
—  hammer or drop forgings (see note 1)
manufactured from the nitriding steels listed in Table 3 and supplied in one of the heat-treatment conditions given for the different types of products in Table 1, rows 2 to 5, and in one of the surface conditions given in Table 2.
The steels are generally intended for the fabrication of quenched and tempered and, subsequently, nitriding machine parts.