English to Russian Tech/Engineering Ships, Sailing, Maritime ROTATING MACHINERY,POWER TRANSMISSION

203 For quenched and tempered steels (QT) and normalised
steels (N) the mechanical testing is to be documented by Work
certificate (W) in accordance with Pt.2 Ch.2 Sec.5 E.
Documentation of mechanical properties may be replaced by
surface hardness (HB) for QT steels with controlling sections
(see ISO 6336-5 Annex A) below 200 mm and for normalised
steels of all sizes