Re: [MW:14399] RE: 14386] MMA welding Electrode Gets red hot

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

On 5/29/12, fredric <fredric.prabu@bwgindia.com> wrote:
> 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: materials-welding@googlegroups.com
> [mailto:materials-welding@googlegroups.com] On Behalf Of
> murtaza506@yahoo.com
> Sent: Tuesday, May 29, 2012 5:34 PM
> To: Materials & Welding
> 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???
>
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--
shankar

--
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