tickfaw
Industrial
- Dec 27, 2002
- 3
Im having cracking problems on the root pass. Im welding 3/4" alloy 20 tubes (.065 wall) to an alloy20 tubesheet (2" thick). We are making a 2 pass strengh weld, saving the tube end. We are maintaining a 250 degree preheat and slow cooling, using ER320 filler on both passes (.045 on the first and 1/16 on the 2nd). we are tig welding using 100% argon. any suggestions would be helpful. Thanks