|Standards, specifications and regulations||Diameter, mm||Tolerances, mm||Length, mm||Length tolerance, mm||Billet weight, kg|
|GOST 4728-2010||210-250||±4,0||As agreed||+50||As agreed|
|Standards, specifications and regulations||Square size, mm||Tolerances, mm||Length, mm||Length tolerance, mm||Billet weight, kg|
|As per agreed technical specification||215x215||±4,0||As agreed||+50||As agreed|
One end of each billet bears the following hot-stamped identification marks, 10mm high and 5mm wide:
The syphon number and heat number are stamped with a space between them.
The last two digits of the year of manufacture are stamped separately.
Each head billet must bear a hot-stamped letter A mark on the ingot head end; each second billet shall bear a letter X mark; and the last billet shall bear a letter З mark.