Penotration issues

[D wizzy]

Just a quick one.

Been welding now for about 2 years ( mainly TIG) but recently been doing a lot of MIG. The main type of welds I'm doing are 6mm fillets on material ranging from 6mm upto 15mm using a pushing weave like technique or forward then back slightly while making sure I keep the arc at the front of the run.

Running at 22v and 8.0 wire speed which works well on 10mm material but just wondered if this is to high on 6mm material and to low on 12-15mm?

Help will be much appreciated

 

[mike 109444]

Never get involved with welding metal of that sort of thickness myself but I would be surprised if the one setting was correct across that range of thicknesses.
You might want to add to the question the wire diameter you are using and the machine make and model.

 

[mike 109444]

And welcome BTW

 

[Richard.]

8m/min 23v with a 0.8 wire = around 180-200amps roughly. which is perfect for 6mm thick steel. It's too low for 10mm IMO and as for the 12mm I'd say you want a lot more.

 

[Richard.]

Travel speed doesn't help with penetration depth. It adds reinforcement and heat input by going slower and vicer verca when going faster.

 

[D wizzy]

Never get involved with welding metal of that sort of thickness myself but I would be surprised if the one setting was correct across that range of thicknesses.
You might want to add to the question the wire diameter you are using and the machine make and model.

Using a jasic mig400 and 1mm wire. What do you guys think to the technique I'm using too or should I just stick to move in one direction? thanks for the replies guys

 

[D wizzy]

8m/min 23v with a 0.8 wire = around 180-200amps roughly. which is perfect for 6mm thick steel. It's too low for 10mm IMO and as for the 12mm I'd say you want a lot more.

I'm currently welding some 15mm uprights to a 12mm base at 24v and 10.0 ws= 280 ish amps so going buy what your saying I think I might just up it a volt just to make sure but do you think weaving it is a good enough technique or should I stick to the more traditional push in at constant pace method?

Thanks for your time

 

[Richard.]

If it's V up a little bit of torch manipulation helps to prevent the molten pool falling back on you . If it's in the flat position turn it all up nice and high and blast away in a straight line. Believe it or not high voltage and high wire Speed with a fast travel will be higher penetration and lower heat input than turning everything down low and traveling slowly.

 

[Richard.]

I'm currently welding some 15mm uprights to a 12mm base at 24v and 10.0 ws= 280 ish amps so going buy what your saying I think I might just up it a volt just to make sure but do you think weaving it is a good enough technique or should I stick to the more traditional push in at constant pace method?

Thanks for your time

If your looking for deeper pen upping the voltage won't help with this. It will put it further into spray transfer (widen the arc) giving more spread to the weld bead. Up the wfs if you need more pen. This will also increase arc current.

 

[D wizzy]

If it's V up a little bit of torch manipulation helps to prevent the molten pool falling back on you . If it's in the flat position turn it all up nice and high and blast away in a straight line. Believe it or not high voltage and high wire Speed with a fast travel will be higher penetration and lower heat input than turning everything down low and traveling slowly.

Sounds like good advice pal but as long as I keep arc at front of weld pool then will I get just as good pen if I weave? because on stuff that's seen I find the weld looks nicer. Thanks