MMA welding Electrode Gets red hot

[murta...@yahoo.com]

I have a MMA welding electrode of SS 308L Dia. 2.6mm. when half of
the electrode is consumed it get red hot, and it gives porosity in the
weld metal what could be the reason i.e. is it a welding problem or
there is a problem in the electrode???
if this problem is due to electrode then what can be the reasons and
rectifications???

[Raghuram Bathula]

uneven coating or flux coating not concentric, try with different
brand

[pawan]

Have u done any electrode baking before use?
Welding parameters plz.

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[prem nautiyal]

The electrode dia. must be 2.5mm and not 2.6mm !

What current you are using ? You might be using higher amperage than the recommended parameters by the consumable manufacturer or your WPS.

Generaaly SS and Inconel 2.5, 3.2 mm dia electrodes have a tendency to get red hot while welding at higher amperages.

This also depends on the coating factor of the electrodes.

Also check the calibration of your welding power source.

 

If the problem of porosity is still there then try with another brand.

 

Regards

 

Prem Nautiyal

From: "murta...@yahoo.com" <murta...@yahoo.com>
To: Materials & Welding <material...@googlegroups.com>
Sent: Tuesday, May 29, 2012 5:33 PM

Subject: [MW:14386] MMA welding Electrode Gets red hot

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[fredric]

Dear

Red hot tendency could occur.

1) If you are using higher currents than the required one. In general 40Amps
per dia is the amperage followed. Being Stainless Steel electrode, 80-90
Amps for 2.5mm dia can be used.
2) Could be due to Eccentricity. While manufacturing process during
extrusion, if the flux is not quoted uniformly on the core wire, then also
this problem could happen. It is normally a batch problem.

You can try either.

1) Use lesser currents. You have not mentioned the currents kept during
welding.
2) Try different batch of electrodes.

Regards
Fredric Prabu. K

-----Original Message-----
From: material...@googlegroups.com
[mailto:material...@googlegroups.com] On Behalf Of
murta...@yahoo.com
Sent: Tuesday, May 29, 2012 5:34 PM
To: Materials & Welding

Subject: [MW:14386] MMA welding Electrode Gets red hot

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[anil verma]

Dear sir,
This normally happens when excessive currents are used.
Regards
For arc welding company
Anil verma
9999200148

On May 29, 2012 5:46 PM, <murta...@yahoo.com> wrote:

[sankar bombay]

Dear friend,

We having the thumb rule for the current according to dia of electrodes

current = ( dia of electrodes x 40)+(or -) 20

Regards
sankar.k

--
shankar

[sankar bombay]

Dear friends,
1) We want to the check the packing of the electrodes
2) check the machine amphs during the welding time
3) check the backing temperature of the elctrodes
4) check the welder using current proper according to wps

after this u have facing the same problem, select some other brand

On 5/29/12, prem nautiyal <prem_na...@yahoo.com> wrote:
>
>
> The electrode dia. must be 2.5mm and not 2.6mm !
> What current you are using ? You might be using higher amperage than the
> recommended parameters by the consumable manufacturer or your WPS.
> Generaaly SS and Inconel 2.5, 3.2 mm dia electrodes have a tendency to get
> red hot while welding at higher amperages.
> This also depends on the coating factor of the electrodes.
> Also check the calibration of your welding power source.
>
> If the problem of porosity is still there then try with another brand.
>
> Regards
>
> Prem Nautiyal
>
>

> ________________________________

> From: "murta...@yahoo.com" <murta...@yahoo.com>
> To: Materials & Welding <material...@googlegroups.com>
> Sent: Tuesday, May 29, 2012 5:33 PM
> Subject: [MW:14386] MMA welding Electrode Gets red hot
>
> I have a MMA welding electrode of SS 308L Dia. 2.6mm. when half of
> the electrode is consumed it get red hot, and it gives porosity in the
> weld metal what could be the reason i.e. is it a welding problem or
> there is a problem in the electrode???
> if this problem is due to electrode then what can be the reasons and
> rectifications???
>
> --
> To post to this group, send email to material...@googlegroups.com
> To unsubscribe from this group, send email to

> materials-weld...@googlegroups.com

> For more options, visit this group's bolg at
> http://materials-welding.blogspot.com/
> The views expressed/exchnaged in this group are members personel views and
> meant for educational purposes only, Users must take their own decisions
> w.r.t. applicable code/standard/contract documents.
>

> --
> To post to this group, send email to material...@googlegroups.com
> To unsubscribe from this group, send email to

> materials-weld...@googlegroups.com

> For more options, visit this group's bolg at
> http://materials-welding.blogspot.com/
> The views expressed/exchnaged in this group are members personel views and
> meant for educational purposes only, Users must take their own decisions
> w.r.t. applicable code/standard/contract documents.
>

--
shankar

[K.Babu]

Hi

 

There would be more concentricity in the electrode , which will give red hot condition.

 

You may lookout the electrode, there should be nearly equal melting of wire and flux,

 

If there is deep cup and cone formation of the electrode , may also cause of the red hot condition, which need to be adjusted by the flux ingredients.

 

May be you check with R&D Engineers from the consumable suppliers.

 

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Thanks & regards,

K.Babu

Singapore