Sounds pretty scientific there Beaver lol basicically i'll be tig ing the first pass then i'll be puttin a couple of passes of stick over it and just weld er out. Im not worried about speed i want good fusion for the first pass.I'll make up for speed with the stick its just basic welding theres no special procedure for welding that frame.If i had a deeper penetrating mig i'd use that after i tigged it but all i got is a 220v/170 amp mig i wouldnt trust it for the press and hydraulics it just doesn't have the ability for penetration and fusion required.We always preheat in Canada its cold up here i don't need any micro cracks forming in the weld because of moisture that could lead to a catastrophic failure.Low hydrogen rods dont like moisture now if i run 6011 for a first pass i might get away without a preheat as long as air temp is above freezing.Personally i prefer heating it up to 250/300 degrees to me it makes for a better weld, up here most high pressure pipe precedures require it depending on air temp for example.So when it gets cold, out come the tiger torches for small bore and chicklets for the big stuff. Alot of the certified plate shops up here sweat it out to 250 degree before its welded .Anyway thats how i do it and so far so good passed alot of xrays and made some good cash over the years.
Oh and Kev she looks good buddy what steel did you make the pins from.
.