What filler metal would you recommended to weld a stainless steel (409Cb) with a normal carbon steel 1008, with MIG process? Do you recommended preheating to avoid the distortion?
That's really one for Technical Al but I would make an educated guess at 309 or 312, don't take my word for it I may be wrong! but Technical Al will put you right/correct me.
weldequip
That's really one for Technical Al but I would make an educated guess at 309 or 312, don't take my word for it I may be wrong! but Technical Al will put you right/correct me.
weldequip
Assuming you mean AISI 1008, its mild steel so that is no problem. The 409Cb is a bit touchy but if you preheat it to 100 oC, weld it using as low a current as possible and use a 309L consumable, it should be fine.
As you are welding them together you may as well preheat the 1008 just to stop the heat-sink effect.
Paulina....are you in the USA ? (The specs are mainly US specs)
Its a strange combination of materials, what is it for ?
Oh and I would avoid 347, theoretically it should crack but in practice it probably wont. The problem with 347 is that you cant get the slag off (if its a slag process), you may see a similar effect with the 409Cb
Mild Steel Vs Stainless Steel , you can use 312 using Argon mix with CO2 ( 95 /5 ) or you can go 100 Argon , the distortion can be avoided welding with a high travel speed.