WOW
The gas cylinder is of 400 series stainless steel.
The front stock ferrule is of tempered chrome moly.
Any pre heat as mentioned in previous posts will remove temper in both parts & as would any post heat treatment.
TIG fixture-
My fixture fits inside the front ferrule & is clamped into place w/ a 1/4-28tpi allen head cap screw w/ aluminum washers to sandwich the parts for perfect alignment.
Another aluminum collar is slipped onto the gas cylinder to back up the opposite side of the front stock ferrule.
A piece to 360 brass is inserted w/ purge holes into the gas cylinder w/ 10 cubes of purge flow while welding.
The gas spindle valve/spring/roll pin is removed & plugged w/ a piece of turned 360 brass.
Any parkerizing has to be removed from the parts prior to TIG welding.
Fillet TIG welds are located at 6 & 12 oclock position of the assembly.
Match the filler to the largest parent material (cyl) or you're wasting time & money chasing cracks.
.030"308 stainless mig wire as a TIG filler rod/wire will not rust or crack accomplishing this simple task.
Hundreds & hundreds & hundreds unitized to date in the last 30+ years w/o issues.
