Welding 4140 or 8620 to A36 or A572 Grade 50 plate
Welding 4140 or 8620 to A36 or A572 Grade 50 plate
(OP)
I am looking at welding 4140 or 8620 annealed, not prehardened, to mild steel. From what I've read, 8620 would be the better choice due to its lower amount of carbon. All I find is that preheat is recommended for the prehardened forms... is that needed for the non-prehardened materials? The size of the shaft will be 6'' being welded to .5'' to 1'' thick material.





RE: Welding 4140 or 8620 to A36 or A572 Grade 50 plate
RE: Welding 4140 or 8620 to A36 or A572 Grade 50 plate
RE: Welding 4140 or 8620 to A36 or A572 Grade 50 plate
RE: Welding 4140 or 8620 to A36 or A572 Grade 50 plate
Why not mechanically connect for transport?
RE: Welding 4140 or 8620 to A36 or A572 Grade 50 plate
RE: Welding 4140 or 8620 to A36 or A572 Grade 50 plate
RE: Welding 4140 or 8620 to A36 or A572 Grade 50 plate
RE: Welding 4140 or 8620 to A36 or A572 Grade 50 plate
RE: Welding 4140 or 8620 to A36 or A572 Grade 50 plate
RE: Welding 4140 or 8620 to A36 or A572 Grade 50 plate
Why don't you consider designing your part to use a bolted connection between the A36 plate and the 8620 shaft? This way you can machine the shaft from heat treated 8620 material.