[MW:3545] Re: Reason for preheating

Hi,
Pre heating of weld joints is to remove the tensile residual stresses, due
to welding and to homogenise the material. Particularly tensile residual
stresses- If the tensile residual stress of the material exceeds more than
50 % of the yield stress of the material, it will lead to localised
yielding/cracking.
Regards,
Vaidehi ganesan,
Metallurgy and Materials Group,
IGCAR, Kalpakkam-603 102, India.
============================================================================
----- Original Message -----
From: "redbull" <mohanq8@gmail.com>
To: "Materials & Welding" <materials-welding@googlegroups.com>
Sent: Mon, Oct 26, 09 12:44
Subject: [MW:3544] Reason for preheating

>
> Dear friends,
>
> Is there any other reason for preheating of weld joints other than
> Code requirements (B31.3). any metallurgical requirement etc.,
>
> Regards,
>
> Mohan.
>
>

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