GOST 2590-06 Rolled steel hot-rolled round (assortment)
This standard regulates the requirements for steel hot rolled round bar (diameter from 5mm to 270mm) which is the raw material for the production of steel grinding balls for ball mills and specifies the following requirements for billet: precision rolling, maximum deviation from accuracy, the cross-sectional area, the mass per meter of the billet, deviation from roundness (ovality) of the billet, the multiplicity of the length of the billet.