3g dual shield flux core welding test - vertical uphill weld test.
and a 4g overhead test too.
My friend Andrew Cardin placed 5th in the world skills welding competition held in Brazil back in 2015.
So I asked Andrew if he could come help me film some videos on 3g and 4g welding tests.
I have been wanting to shoot these videos for quite a while and it made sense to me to team up with Andrew.
I really hope this video helps someone pass a welding test.
Why Dual Shield Flux Core?
Because there are quite a lot of welding jobs out there that require passing a 3g and 4g dual shield flux core test in order to get past the gate.
Thats why they call it a gate test.
Shipyards are a very common place a welder might need to pass this test...but its also a very common test for lots of other industries and local union hall training centers.
AWS D1.1 structural welding code for steel has a provision that if a welder passes both 3g and 4g plate tests, the welder is qualified for all positions.
And since there are Dual Shield Flux Core prequalified procedures available from the AWS, it makes the process a popular choice.
This page will start out with the video about 3g welding test using dual shield flux core...and as soon as the 4g test video is done, it will be posted here as well.
It is possible to use the same settings from start to finish...but that is probably not the best practice for the 3g test unless the WPS requires that.
For the 3g vertical uphill test...The root pass seemed to weld best at 24 volts and 330 ipm using .045" e71t-1 wire. (lincoln ultra core 71A85)
But after the root was done, decreasing settings to 23 volts and 275 ipm helped control the puddle.
For the 4g overhead, 25 volts and around 360ipm worked fine all the way out...root, fill, and cap.
3/8" (9.5mm) plate
22.5 deg bevels
1/4" (.6mm) gap
1/4" (.6mm) thick backing
.045" (1.1mm) E71t-1 dual shield flux core wire
75/25 argon/co2 shielding gas set at around 35 cfh
watch more flux core videos
uphill flux core on a tee joint
wikipedia article on flux core welding