... 1.2%(m/m) Steel gradeChemical composition(percentage by mass)Name Material numberCmaxSimaxMnmaxPmaxSmaxNCrMoNiTiOtherFerric steelsX2CrTi12X6Cr17X3CrTi171,45121,40161,45100,030,080,051,001 ... -12,5016,00-18,0016,00-18,00 6(C+N)-0,654(C+N)+0,15 to 0,80,10-0 ...