Welding 4130 To Mild Steel. While I feel this is a total bullshit way to do it to each his own. Do I need to do anything differently when welding 4130 compared to mild steel.
Select a filler metal. General guidelines as Ive not done the specific weld you asked about. Abrasion-resistant AR steel plate typically is more resistant to abrasive wear than steel or low-alloy steel plate so its often used in heavy equipment and mining equipment applications.
Is purging going to solve this or is that just delaying the inevitable.
Low-hydrogen electrodes minimize the amount of diffusible hydrogen in the weld. Also what is the best type of filler rod to use when welding 4130 to 4130. Is purging going to solve this or is that just delaying the inevitable. Its not recommended to weld 4130 or 4140 steel in the quench and tempered or case-hardened conditions without first performing annealing or normalizing in the area to be welded.