Re: [MW:9140] Why is preheating important for welding Alloy Steel?

PREHEATING IS REQUIRED FOR HIGH ALLOY STEEL LIKE AS P91 MATERIAL , BECAUSE P91 MATERIAL IS CORE GRAIN MATERIAL, WHICH IS MOST HARD MATERIAL, AND THE GRAIN SIZE IS VERY HARD, SO BROKEN OR MELT THIS GRAIN SIZE WE PREHEAT THE MATERIAL AT 250 YO 350C, DEPENDING UPON THICKNESS, OTHERWISE WE DO NOT APPLY PREHEAT ON MATERIALON HIGH ALLOY WELDING CRACK DEFENTLY FOUND.

On Fri, Jan 7, 2011 at 1:20 PM, Suresh Babu <suresh75.babu@gmail.com> wrote:

Dear Team..i would like to get a correct answer for the following
question.

Why is preheating important for welding Alloy Steel?

Thanks in advance
SURESH.

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