[MW:1208] Re: Process required to repair crack in casting ASTM A 148 GR 80-40

 
Please use E7018-1 electrode as we have used it in past.Dont do R&D now.
Also we had not gone for any PWHT after welding. The cast part is functioning in service after repair (almost a year back).
If u do PWHT, it is always better.

Regards

Prem Nautiyal

On Tue, 14 Oct 2008 greetings wrote :
>Prem ,
>
>  Thanks for your suggestion
>Can I use E 8018 G electrode with preheat temp 70 (Min) & Interpass Temp 500
>(Max)
>
>
>Regards
>DST
>
>On Mon, Oct 13, 2008 at 7:41 PM, PREM SHANKARDUTT NAUTIYAL <
>prem_nautiyal@rediffmail.com> wrote:
>
> >
> > Dear Friend
> >
> > ASTM A 148 is a ferritic-pearlitic carbon steel for cast products. It is
> > used for higher pressures and stress parts like crane wheels,etc..
> > I think the chemical composition is C=0.4-0.5, Mn=0.4-0.8,
> > Si=0.2-0.5,P&S=max.0.090.
> >
> > First you should arrest the crack by drilling two holes,remove the crack by
> > hand grinding, ensure crack removal by LPT.
> > Preheat the job to 250 degrees celcius, Use E7018-1 electrodes,Interpass
> > temp of 250 degrees celcius and weld. After welding cover the job with
> > asbestos cloth for slow cooling.
> > I am suggesting you this procedure because we had repaired one cast steel
> > of similar composition in the past.
> >
> > Any suggestions / expert comments are welcome...
> >
> > Cheers
> >
> > Prem Nautiyal
> > Godrej, Mumbai
> > Cell: 9820313278
> >
> > On Sun, 12 Oct 2008 greetings wrote :
> >
> > >Friends,
> > >            Crack observed in casting material ASTM A 148 GR 80-40
> > >Can any one give the process to rectify the crack (welding
> > electrode,Preheat
> > >Temp & etc)
> > >
> > >Regards
> > >DST
> > >
> > >> >
> >
> > PREM S NAUTIYAL
> > CELL : 9820313278
> >
> >  [image: Black578x38_banner2.gif]<http://adworks.rediff.com/cgi-bin/AdWorks/click.cgi/www.rediff.com/signature-home.htm/1050715198@Middle5/2606998_2599290/2602379/1?PARTNER=3&OAS_QUERY=null>
>
>>

PREM S NAUTIYAL
CELL : 9820313278

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