Part 2 of this European Standard, in addition to part 1, specifies requirements for flat and long products of hot-rolled weldable fine grain structural steel in the normalized delivery condition in the grades and qualities given in table 1 (chemical composition) and tables 3, 4 and 5 (mechanical properties), in thickness ??150 mm for grades S275, S355 and S420 and in thickness ? 100 mm for grade S460.