This document specifies dimensions, shape, mass and tolerances of metric series hot-rolled steel bars.

This document is applicable to:

1. hot-rolled round bars with diameter of 5,5 mm up to 400 mm;
2. hot-rolled square bars with side length of 5,5 mm up to 300 mm;
3. hot-rolled flat bars with thickness of 3 mm up to 60 mm and width of 10 mm up to 200 mm;
4. hot-rolled hexagonal bars with distance across opposite flats of 8 mm up to 70 mm;
5. hot-rolled octagonal bars with distance across opposite flats of 16 mm up to 40 mm.

NOTE            Wide flats can be covered under flat bars for practical reasons.