1.1 This part of ISO 9327 applies to forgings and rolled or forged bars in thicknesses up to 250 mm manufactured from fine grain steels (see NOTE) given in Table 1 and to be delivered according to the specifications given in ISO 9327-1. The steels are classified into — room temperature grades (P…), — elevated temperature grades (PH…), — low temperature grades (PL…), — low and elevated temperature grades (PLH…). NOTE Fine grain steels are here understood as steels with grain size 6 or finer according to the grain size charts in ISO 643. 1.2 This part of ISO 9327 covers the following data: a) In Table 1 the limits for — the chemical composition according to the cast analysis; — the tensile properties at room temperature; — the indications on the usual heat treatment condition at the time of delivery; b) in Table 2 the permissible product analysis tolerances on the limiting values given for the cast analysis; c) in Table 3 the minimum impact energy values; d) in Table 4 the minimum elevated temperature proof strength values.