①Elements which are not featured in this Table may not be deliberately added to the steel except for the purpose of finish-treating the melt. Every suitable precaution must be taken to ensure that no such elements are inadvertently added via the scrap or via other substances used for manufacture; percentages of companion elements are however permissible provided that the specified values of mechanical properties and of hardenability are satisfied, and that the usability of the product is not impaired
②In the case of steel melted or remelted under vacuum, the manganese content may be allowed to drop slightly below the lower limit specified.
③In the case of melting or remelting according to the electroslag process, the phosphorus and sulphur contents shall each be ≤ 0.015 %.

①GZK=annealed for spheroidization of carbides；GZK+K=annealed for spheroidization of carbides + cold finished；GKZ+K+G=annealed for spheroidization of carbides + cold finished + soft annealed；GKZ+SH=annealed for spheroidization of carbides + peeled；C=treated for shearability；BG=heat-treated for ferritic-pearlitic structure；BF=heat-treated to achieve a given tensile strength；BG+K=heat-treated for ferritic-pearlitic structure + cold finished
② HV in the case of thin product
③The hardness of steel in GKZ+K+G state is for reference only.