[MW:2069] RE: 2060] Re: preheat calculation

Hi

 

This calculation as given below is used but is extremely conservative resulting in much higher preheat temperatures than what is actually required. This impact on costs negatively.

 

Regards

 

John du Plessis

Technology Manager

Southern African Institute of Welding

+27 11 2982103 (T)

+27 11 8364132 (F)

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From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of PREM SHANKARDUTT NAUTIYAL
Sent: 29 April 2009 01:25 PM
To: materials-welding@googlegroups.com
Cc: sandy kumar
Subject: [MW:2060] Re: preheat calculation

 

Hi

Please use following formula to calculate Preheat temp.

Preheat  temperature in Degree celcius = 350 * Square root of (C.E – 0.25 )

Where C.E = CC + CT
CT  = CC * 0.005 * T
T = thickness of plate in mm
CC  = C + Mn/6 + Ni+Cu/15 + Cr+Mo+V/5

Regards

Prem S Nautiyal
Godrej,Plant 9/19,Mumbai

On Mon, 27 Apr 2009 sandy kumar wrote :
>Can anyone please provide me formula to calculate preheat required for any
>material?
>
>Thanks
>Sandy
>
>>

PREM S NAUTIYAL
CELL : 9820313278

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