HEAT AFFECTED ZONE CALCULATION

[antony jenis]

DEAR SIRS,

i need to calculate the heat affected zone for the 50 mm thickness plate as per AWS D1.1.
if you have any other code for the formula .


regards
antony jenis

[praveen alavandar]

Dear Antony,   What do you mean from HAZ calculation? are you trying to calculate the width of HAZ?   There is no such direct calculation or ready made formula available to calculate the width of HAZ, generally the width of HAZ depends on several factors.   - Welding Process used, - Welding parameters / Heat input used, - Preheat / Interpass temperatures, - Material and Thickness used, etc.,     Hope this helps,   Regards,   A.Praveen Muscat       If you wanted to calculate the exact width, then weld a coupon and send it your lab for macro examination, after you etch the polished specimen you'll be able to clearly see the width of the HAZ.   --- On Mon, 2/7/11, antony jenis <anton...@gmail.com> wrote:

-- To post to this group, send email to material...@googlegroups.com To unsubscribe from this group, send email to materials-weld...@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

[arulmani ramasamy]

Hi, You can theoretically calculate the HAZ, but may not be accurate. There are thick plate & thin plate equations. First you should findout whether to us thin plate or thick plate equation then accordingly use the applicable formula. You can find these formulas in AWS welding handbook, I dont know the volume no. I could recall only thin plate equation   1/Tp-To = 4.13pcty/ Hnet  + 1/Tm-To; where, Tp is peak temperature, To is initial plate temp (room temp or preheat temp), pc-heat capacity, Tm is melting temp;   Regards  R.Arulmani HP-(65)81635244 --- On Tue, 2/8/11, praveen alavandar <prave...@yahoo.com> wrote:

[james gerald]

To add to Arulmani's mail. you can find those details in Welding Handbook under Chapter Heading "Heat Flow in Welding". J.GERALD JAYAKUMAR 00919344954677   --- On Tue, 2/8/11, arulmani ramasamy <raru...@yahoo.com> wrote:

[ِِAlaa]

Hello guys, What is the size of HAZ according to codes? please mention the code that refers to this point.

[Prasad Rode]

Dear sir,

I didn't know about code reference, but can say that HAz for thin plate is the about fraction of inch. But for thick plate, HAZ will be maximum 10mm.
As said earlier, HAZ depends on several factor like plate thk, process, heat input etc.
Consider haz max. 25mm
Experts, Correct it , if I am wrong.

Regards
Prasad Rode

[Dinesh Somwanshi]

Dear ,

Easy way to define approximate value of HAZ by consideration with color discoloration happens due to welding .

Thanks & Regards

DINESH VITTHAL SOMWANSHI

BACHELOR IN MECHANICAL ENGINEER

AUTHORIZED PIPING / WELDING / NDT / PAINTING INSPECTION PERSONNEL
API 570 - Piping Inspector, AWS - CWI , CSWIP 3.1*,*BGAS  Gr 2 / 3
NDT II -UT , RT , MT , PT, VT
+7 924 374 6660 Russia , 00919881344135 India ( Whatsapp )
Skype = dinesh somwanshi

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[james gerald]

Please check AWS Handbook Chapter Heat Flow in Welding

There is a Formula for it and by specifying the Peak Temperature as Ac1 temperature, you can determine the width of HAZ

 

Thanks & Regards

J.Gerald Jayakumar

0091-9344954677

---

From: Prasad Rode <puro...@gmail.com>
To: Materials & Welding <material...@googlegroups.com>
Sent: Sunday, July 9, 2017 1:46 PM
Subject: Re: [MW:26667] HEAT AFFECTED ZONE CALCULATION

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[Dinesh Somwanshi]

 Question: How to calculate heat affected zone in weld?

 Answer: Heat affected zone is measured regarding the microstructure changes in the weld. For example in steels, this is the area around the weld zone, which has undergone a transformation. In other words, this is the area, which had been austenitized. For calculating the HAZ after welding, for steels, it is better to macroetech the section of the weld HAZ can be easily recognized by the contrast it makes with the base metal and the weld metal.

Thanks & Regards

DINESH VITTHAL SOMWANSHI

BACHELOR IN MECHANICAL ENGINEER

AUTHORIZED PIPING / WELDING / NDT / PAINTING INSPECTION PERSONNEL
API 570 - Piping Inspector, AWS - CWI , CSWIP 3.1*,*BGAS  Gr 2 / 3
NDT II -UT , RT , MT , PT, VT
+7 924 374 6660 Russia , 00919881344135 India ( Whatsapp )
Skype = dinesh somwanshi

असो द्यावी दया तुमच्या लागतसे पाया.

*Pray for others, sometime, You might never need to pray for yourself
again.....*

On Sun, Jul 9, 2017 at 7:04 PM, 'james gerald' via Materials & Welding <material...@googlegroups.com> wrote:

Please check AWS Handbook Chapter Heat Flow in Welding

There is a Formula for it and by specifying the Peak Temperature as Ac1 temperature, you can determine the width of HAZ

 

Thanks & Regards

J.Gerald Jayakumar

0091-9344954677

---

From: Prasad Rode <puro...@gmail.com>

To: Materials & Welding <materials-welding@googlegroups.com>

Sent: Sunday, July 9, 2017 1:46 PM
Subject: Re: [MW:26667] HEAT AFFECTED ZONE CALCULATION

Dear sir,

I didn't know about code reference, but can say that HAz for thin plate is the about fraction of inch. But for thick plate, HAZ will be maximum 10mm.
As said earlier, HAZ depends on several factor like plate thk, process, heat input etc.
Consider haz max. 25mm
Experts, Correct it , if I am wrong.

Regards
Prasad Rode

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[Prasad Rode]

Dear sir,

HAZ calculation may done as explained by experts.
But my query will be normally to avoid the crossing of two weld of HAZ, what will be the consideration of HAZ width.

Regards
Prasad Rode

On Jul 11, 2017 4:31 PM, "Dinesh Somwanshi" <som...@gmail.com> wrote:

 Question: How to calculate heat affected zone in weld?

 Answer: Heat affected zone is measured regarding the microstructure changes in the weld. For example in steels, this is the area around the weld zone, which has undergone a transformation. In other words, this is the area, which had been austenitized. For calculating the HAZ after welding, for steels, it is better to macroetech the section of the weld HAZ can be easily recognized by the contrast it makes with the base metal and the weld metal.

Thanks & Regards

DINESH VITTHAL SOMWANSHI

BACHELOR IN MECHANICAL ENGINEER

AUTHORIZED PIPING / WELDING / NDT / PAINTING INSPECTION PERSONNEL
API 570 - Piping Inspector, AWS - CWI , CSWIP 3.1*,*BGAS  Gr 2 / 3
NDT II -UT , RT , MT , PT, VT
+7 924 374 6660 Russia , 00919881344135 India ( Whatsapp )
Skype = dinesh somwanshi

असो द्यावी दया तुमच्या लागतसे पाया.

*Pray for others, sometime, You might never need to pray for yourself
again.....*

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