51 stainless steel pipe network introduction common steel bar steel composition table number chemical composition (%) C Mn Si P ≤ S ≤ Cr Ni Mo Cu ≤ 45 0.42 ~ 0.50 0.50 ~ 0.80 0.17 ~ 0.37 0.035 0.035 0.25 0.25 0.25 16Mn 0.12 ~ 0.20 1.20 ~ 1.60 0.20 to 0.60 0.035 0.035 ≤ 0.30 ≤ 0.30 0.25 20MnMo 0.17 to 0.23 1.10 to 1.40 0.17 to 0.37 0.035 0.035 ≤ 0.30 ≤ 0.30 0.20 to 0.35 0.25 40Cr 0.37 to 0.44 0.50 to 0.80 0.17 to 0.37 0.035 0.035 0.80 to 1.10 ≤ 0.30 0.3 35CrMo 0.32 -0.40 0.40 to 0.70 0.17 to 0.37 0.035 0.035 0.80 to 1.10 ≤ 0.30 0.15 to 0.25 0.3 5CrMnMo 0.50 to 0.60 1.20 to 1.60 0.25 to 0.60 0.03 0.03 0.60 to 0.90 0.15 to 0.30 0.3 34CrNi3Mo 0.30 to 0.40 0.50 to 0.80 0.17 to 0.37 0.03 0.035 0.70 to 1.10 2.75 to 3.25 0.25 to 0.40 40CrNiMoA 0.37 to 0.44 0.0 to 0.80 0.17 to 0.37 0.035 0.035 0.60 to 0.90 1.25 to 1.65 0.15 to 0.25 0.3 0Cr18Ni9Ti (304) ≤ 0.08 ≤ 2.00 ≤ 1.00 0.035 0.03 17.0 to 19.0 8.00 to 11.0 Ti : 5(C-0.02)～0.80 0Cr18Ni12MoTi(316) ≤0.12 ≤2.00 ≤1.00 0.035 0.03 16.0～19.0 11.0～14.0 1.80～2.50 Ti:5(C-0.02)～0.80 0Cr13Ni6Mo2Re 0.06 0.60 to 0.90 ≤ 0.80 0.035 0.035 12.0 to 14.0 5.00 to 6.50 2.00 to 2.50 Formulation: Re=0.20 0Cr13 ≤ 0.08 ≤ 0.60 ≤ 0.60 0.035 0.03 12.0 to 14.0 0Cr25Ni5Mo2 ≤ 0.07 ≤ 1.00 ≤ 1.00 0.04 0.03 23.5 to 25.5 5.00 to 6.00 1.50 to 2.50 N ≤ 0.05