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Re: [MW:28231] HEAT INPUT Vs IMPACT

By Materials & Welding
Hi,
Please find attached a document on key concept regarding heat input and impact value, submitted earlier. It should clear some basic doubts. 

Best Regards,

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On Monday, 27 August, 2018, 3:29:54 PM IST, Aslam Khan <aslamkhan15@gmail.com> wrote:


Heat Input(J/mm) = (Amperage x Voltage x 60)/Travel Speed

Please check QW-409.1 for detail description..

On Mon 27 Aug, 2018, 8:10 AM Kannayeram Gnanapandithan, <kgpandithan@gmail.com> wrote:
What is the formula for calculating Heat input. Interpass temp is also important to achieve good impact values

On Mon, 27 Aug 2018 8:06 am Paresh Katvi, <pkatvi@gmail.com> wrote:
Not only travel speed but also selection of the welding consumables.
Regards,
Paresh 

On Sun, 26 Aug 2018, 15:31 CHITTARANJAN BHIWANDKAR, <crbhiwandkar.smspl@gmail.com> wrote:
Thanks PARESH, 
In other words the Impact values in MTC 
can be a governing value to decide on travel speed.

On Sun, 26 Aug 2018, 12:36 p.m. Paresh Katvi, <pkatvi@gmail.com> wrote:
Hi 

In my opinion, Heat input is a crucial criteria to achieve impact values in Weld, HAZ and Parent Metal. Travel speed is one of important contributor  for determining heat input. Again it is very important , which material , thickness and welding process used for establishing heat input to achieve desired toughness property. 

You need to referred your historical  records in order to judge and establish heat input parameters to achieve particular range of impact values in given material.

Regards,

Paresh

On Thu, Aug 23, 2018 at 4:35 PM BHIWANDKAR C R <crbhiwandkar.smspl@gmail.com> wrote:
SIR,
WHILE PREPARING WPS THE CONSIDERATION OF 
HEAT INPUT JOULES TO JOULES ON MILL T C
IS REQUIRED TO BE DONE. OR THE TRAVEL SPEED
CAN BE DETERMIND ON THE BASIS OF THE IMAPACT
TEST VALUES GIVEN ON MILL TC

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