①Elements not included in this Table (but see footnote *) shall not be intentionally added to the steel without the agreement of the purchaser, except for elements which may be added for finishing the cast. All appropriate measures shall be taken to prevent the addition of undesirable elements from scrap or other materials used in the steel making process.

*Additions of Nb, Ti and V are permitted at the discretion of the manufacturer. The content of these elements shall be reported.

① +C=Cold drawn / hard(冷拔/硬化)；② +LC =Cold drawn / soft(冷拔/軟化)；③ +SR=Cold drawn and stress relieved(冷拔并去除應力)；④ +A=Annealed(退火)；⑤ +N=Normalized(正火)
*For tubes with outside diameter ≤ 30 mm and wall thickness ≤ 3 mm the R_eH minimum values are 10 MPa lower than the values given in this Table.
注：表中σ_s為上屈服強度R_eH