I need to repair a connection that was G-105 and I am going to use 4145HMOD (they match yields,tensiles and charpys) I will be using E12018-m for filler. My plan is to pre-heat 370 deg Celcius and post 250 deg celcius 4-8 hrs. I believe this should be sound for the 4145 but am not sure for th G-105. Anyone have any advice?