焊缝金属分析 Mn Mn Mo Cu C Nb Si Ferrite FN Ni Cr 1.7 % - - - - - - - - Mo Mn Mo Cu C Nb Si Ferrite FN Ni Cr - 2.60 % - - - - - - - Cu Mn Mo Cu C Nb Si Ferrite FN Ni Cr - - 0.10 % - - - - - - C Mn Mo Cu C Nb Si Ferrite FN Ni Cr - - - 0.05 % - - - - - Nb Mn Mo Cu C Nb Si Ferrite FN Ni Cr - - - - 0.50 % - - - - Si Mn Mo Cu C Nb Si Ferrite FN Ni Cr - - - - - 0.8 % - - - Ferrite FN Mn Mo Cu C Nb Si Ferrite FN Ni Cr - - - - - - 6 % - - Ni Mn Mo Cu C Nb Si Ferrite FN Ni Cr - - - - - - - 11.9 % - Cr Mn Mo Cu C Nb Si Ferrite FN Ni Cr - - - - - - - - 18.8 %