What electrode can I use to join mild steel to stainless steel?
Electrode selection is determined from the base metal chemistries and the percent weld admixture. The electrode should produce a weld deposit with a small amount of ferrite (3-5 FN) needed to prevent cracking. When the chemistries are not known, our Blue Max® 2100 electrode, which produces a high ferrite number, is commonly used. Dissimilar Metals: Welding Stainless Steel to Mild Steel