[MW:1204] RE: 1202] Re: Process required to repair crack in casting ASTM A 148GR 80-40

what about PWHT? what type of heat treatment has been given to original casting?

-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]On Behalf Of greetings
Sent: Tuesday, October 14, 2008 6:23 AM
To: PREM SHANKARDUTT NAUTIYAL
Cc: materials-welding@googlegroups.com
Subject: [MW:1202] Re: Process required to repair crack in casting ASTM A 148GR 80-40

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
>

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