Welding 8620 To Mild Steel. Shouldnt be much stress on the weld. In some cases a specification will allow or require a lower-strength filler material.
Forming characteristics of 8620 alloy are good in the annealed condition. Low carbon mild steel is the industry standard for room-temperature welding work. If the welded component will be used in the as-welded or stress-relieved condition select a low-hydrogen-type electrode with a tensile strength of about 110000 PSI.
For stick welding a specialty stainless steel electrode for hard to weld crack sensitive steels such as a modified 312 type eg.
When a higher-strength part is welded to a lower-strength carbon steel the filler metal. The keyways had fractured. But it would not be practical to heat treat the 8620 material after welding. If the welded component will be used in the as-welded or stress-relieved condition select a low-hydrogen-type electrode with a tensile strength of about 110000 PSI.