Filler material for welding 4330 to 4330
Filler material for welding 4330 to 4330
(OP)
I would like to weld 4330 to 4330. What types of filler materails are avaiable that will give me the sames streight requirements as the base material or the best strenghts. I don't plan to preheat but I am going to post heat at 1000 deg F. It is the hot tearing in the material that has my in a bind. I thought if I added a filler material if might reduce the hot tearing and not really reduce the overall strenght on the material. Can someone offer some advise of a filler material that might help.





RE: Filler material for welding 4330 to 4330
You absolutely need to preheat for 43xx steels. What ype of joint configuration? What process? What is the heat treatment condition of the 4330?
One possible filler metal is
AWS SFA 5.5 E8018 C3 (SMAW process).
RE: Filler material for welding 4330 to 4330
RE: Filler material for welding 4330 to 4330
RE: Filler material for welding 4330 to 4330
RE: Filler material for welding 4330 to 4330
You need to preheat to avoid high stresses during solidification and to avoid quenching the fusion zone which can produce high transformation stresses. These high stresses cause brittleness and cracking.
I don't see how reducing beam diameter will reduce silicon found in hot tears. I recommend adjusting beam diameter to obtain the proper penetration depth and to cover for any alignment variations from the parts and process.
You may need a filler, maybe even a highly ductile nickel-based one. We use one for similar welding of 4320 without preheat, but our metal has better weldability than yours (lower carbon concentration). I am not sure the huge expense on the wire is better than investing in a preheating station, but that is an economic decision.