welding A36 and A500 to SAE 1030 cast steel

[mwccwi]

Looking for some feedback. We've successfully been GMAW welding A36 and A500 to SAE 1030 cast steel using ER70-S3 both CV Spray and modified pulse spray. Asides from the basic WPS parameter controlls we try to stay away from specilize control such as pre/post heat to save cost and training requirements. Recently we've been asked to explore welding A36 and A500 to SAE 1045 caststeel-now we just left the low carbon safety zone- The question is can we pull this off with only using the lowhydrogen variation to the GMAW process?

Feedback please. Anything to help.

 

[metengr]

mwccwi;
At this carbon content for the base material (1045), you will at least be into preheat requirements (200 deg F) for welding even with the low hydrogen wire. I would suggest you perform a mock-up and test using ASME B&PV Code, Section IX as a guide. I would confirm this before production.

 

[GRoberts]

Unless there is some sort of contamination, GMAW is always a low-hydrogen process. If you have a .45% C steel, preheat is generally required even for low hydrogen. The main exception would be welding thin sheets, but if you are welding 1045 castings, that would not be the case.