stainles (help)

[dadbennet]

i have a mig 175 pro I am running 100% argon on a 10 L/min setting power A wire speed 2.with .035 stainless wire.My welds are very bulky and there is a popping as i weld what is causing the pop the stainless is very thin do i have wrong gas or is it set right or do i just need to practice.weld thing new to me have done some gassless with cold steel it turned out ok.

 

[irondarren]

pure argon isnt ideal for stainless, but you should be able to make ok welds with it. I take it the filler wire you are using is a match for the parent materials.

 

[dadbennet]

yes

 

[dadbennet]

would a unamix 9 work better

 

[dadbennet]

what is cauing popping i think wire feed to fast and holding gun to far from work

 

[irondarren]

can you post some pics of the welds?

 

[peterd51]

Hi,

is the pop coming from the regulator?

Mine has been doing that on and off for some time and I've been able to stop it for a while by turning the gas flow up high, welding for a few seconds and then turning it down again.

I've finally ordered a new regulator.

Regards
Peter

 

[dadbennet]

????

thanks for the info feel stupid but what exactly does the gas do and how do you know when you have got the flow set right and should the arc be a blue color

 

[vtec_lude]

Don't use pure argon for mig welding stainless. Use argon/co2 mix.

 

[Drains]

Don't use pure argon for mig welding stainless. Use argon/co2 mix.

Only argoshield light mind, not med or heavy.

 

[vtec_lude]

Yes argonshield light is fantastic.

 

[dadbennet]

what is the percent mixture for the argon light

 

[Codafile4]

Argon Lite comes ready mixed in a BOC cylinder, dont try mixing these gas yourself, the gas, Argon, contains approx 2% CO2 acting as a "wetting agent" the gas is there to protect the weld bead and therefore the angle off the torch has to be angled to give the weld full cover, the angle of the torch is 22-24 deg from vertical, with MIG you can use forehand, backhand or vertical, if your completed weld has a Brown deposite then you are not giving the weld enough cover ie wrong angle, contact tip in dip transfere needs to be approx 1/8" extended from the nozzle, in spray transfere the tip needs to be 1/8" inside the nozzle. ensure you remove the drose from the nozzle each time you stop. if you dont the gas sheilding will reduce causing your weld to go brown. Cylinders are rated at 250bar pressure, ensure that the regulator is higher than this you will find this on the bonnet of the regulator as "BAR SERVICE" . gas flow needs to be 12-15lpm too much gas will propogate holes or cause hydrogen cracking.hope that helps.

 

[Robotstar5]

gas flow needs to be 12-15lpm

Try telling our production welders that!

They like to have everything on maximum including the flow regulator with the indicator ball jammed against the top (30 LPM) as they think this will make the job quicker/easier.

I've just ordered some regulators that have to be set with a key and am considering removing the voltage and wire speed knobs once they've been set!

 

[Codafile4]

Try telling our production welders that!

They like to have everything on maximum including the flow regulator with the indicator ball jammed against the top (30 LPM) as they think this will make the job quicker/easier.

I've just ordered some regulators that have to be set with a key and am considering removing the voltage and wire speed knobs once they've been set!

Good man, Snowcat has mentioned setting up a course for teaching people how to weld,these could be first candidates.

 

[Codafile4]

thanks for the info feel stupid but what exactly does the gas do and how do you know when you have got the flow set right and should the arc be a blue color

Hi ,The gas is a sheilding to protect the arc from the atmosphere. some gases are Active (MAG) and have an effect on the arc, pure argon is and inert gas, (MIG) and has no effect on the arc, CO2 is an active gas which does have an effect. using a mixed gas ie Argosheild light, medium or heavy contains either CO2 or Oxy and all come under MAG weldiing. using a flow meter, set to 12-20 lpm depending if your inside or outside and have the right torch angle
The arc emits very strong Ultra violet light and extreamly harmfull to exposed skin, this light is blue.

by the way, there is no such thing as a soft or silly question, we have all been there