[MW:1255] RE: 1253] RE: 1250] Re: HAZ

Partial weld around a pipe joint with clear heat affected zone. This is ASME SA106 Grade B steel pipe NPS 2.5 SCH 80 with J-grooved prepared ends. An automated TIG orbital welder made half an orbit before aborting. The heat affected zone is clearly visible because of the polished ends, even though it is generally inoccuous in this material. (SA106 Grade B) Photo by Yannick Trottier, 2006.

-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]On Behalf Of CKPurohit
Sent: Tuesday, October 28, 2008 9:57 AM
To: materials-welding@googlegroups.com
Subject: [MW:1253] RE: 1250] Re: HAZ

Dear Shailesh,

As everybody informed that HAZ is largely depend on the process and other parameter is correct but my experience HAZ in manual welding is less than 3 mm and Auto (SAW and other high heat input process) it will be less than 5 mm for carbon steel and LAS. For SS I have not observed HAZ bigger than 1 mm (we can see after etching too).

I hope experienced people like Mr Kalayan can comment on statement as he might have seen many cross section HAZ after etching…..

Regards.

C. K. Purohit

General Manager

QA / QC / WELDING / NDT / R&D

KNM Process Systems Sdn Bhd - Malaysia

HP - +6016 337 6448

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kalyan Elcalabs
Sent: Sel, 28 Okt 08 02:42 pm
To: materials-welding@googlegroups.com
Subject: [MW:1250] Re: HAZ

Dear Shailesh,

There is no thumb rule for the formation of HAZ. This largely depends on welding procedure, equipment used, various consumables, electrical parameters, operators skill and the uncertainities contributed by them. Normally one should expect minimum HAZ as is it not a desirable phenomena in any welding process.

N. Kalyan.

ELCA Laboratories.

----- Original Message -----

From: shailesh dave

To: materials-welding@googlegroups.com

Sent: Monday, October 27, 2008 6:53 PM

Subject: [MW:1247] Re: HAZ

DEAR SACHIN,

LET ME MAKE MY QUESTION CLEAR TO YOU. FROM WELD JOINT END HOW MUCH IS THE WIDTH OF HAZ.

REGARDS,

SHAILESH

--- On Mon, 10/27/08, sachin sankhe <sachin.sankhe@rediffmail.com> wrote:

From: sachin sankhe <sachin.sankhe@rediffmail.com>
Subject: [MW:1246] Re: HAZ
To: materials-welding@googlegroups.com
Date: Monday, October 27, 2008, 5:34 PM

Hi Shailesh
Your question is not clear

Regards
Sachin

On Sat, 25 Oct 2008 shailesh dave wrote :
>DEAR MEMBERS,
>
>WOULD YOU PLEASE TELL ME WHAT COULD ME THE THUMB RULE FOR HEAT AFFECTD ZONE DURING WELDING.
>
>REGARDS,
>
>S.N.DAVE
>I/C QA/QC DAS ISLAND UAE

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