Steel Specification?

Question

Can someone please explain this steel grade/standard/specification. 

 ST 3K 32 BK NK 

Answer 1

what country?

England, steel specs all start with BS followed by a 2-4 digit number.

US SAE are all 4 digit numbers

international UNS numbering system is a letter followed by 5 digits

European Standard for steel is a single letter followed by a number.

however, a google search turns up this:

St3, St30, Stal3 (or Stal30) are different designations of one particular type of steel - 0.30% Carbon content and no additional elements, enhancing the performance. The official GOST (GOsudarstveniy STandard - the Soviet/Russian State Standard) designation of the steel is Stal Marki 30 (Steel Mark 30)