Skip to main content

Re: [MW:26665] HEAT AFFECTED ZONE CALCULATION

By Materials & Welding

Hello guys, What is the size of HAZ according to codes? please mention the code that refers to this point.
بتاريخ الثلاثاء، 8 فبراير، 2011 10:19:58 ص UTC+3، كتب 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:

From: arulmani ramasamy <raru...@yahoo.com>
Subject: Re: [MW:9768] HEAT AFFECTED ZONE CALCULATION
To: material...@googlegroups.com
Date: Tuesday, February 8, 2011, 5:06 AM

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:

From: praveen alavandar <prave...@yahoo.com>
Subject: Re: [MW:9766] HEAT AFFECTED ZONE CALCULATION
To: material...@googlegroups.com
Date: Tuesday, February 8, 2011, 10:02 AM

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:

From: antony jenis <anton...@gmail.com>
Subject: [MW:9762] HEAT AFFECTED ZONE CALCULATION
To: material...@googlegroups.com
Date: Monday, February 7, 2011, 7:48 PM

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

--
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.

--
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.

--
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.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
Visit this group at https://groups.google.com/group/materials-welding.
For more options, visit https://groups.google.com/d/optout.

Comments

Post a Comment

Popular posts from this blog

Re: [MW:34105] SA266 GR4N 4 Cycle SPWHT

By Materials & Welding
Hi,  You are correct, Minimum refers to the one cycle for which this part will expose until final work shop PWHT. hence mill test certificate shall include this.  Max. SPWHT, refers to additional cycles of heat treatment that are reserved for future repairs during equipment lifetime.  Again, these simulated no. Of cycles shall be specified in MTC.  The idea is we need to make sure that steel mechanical properties are not compromised upon exposure to multiple repairs (i e 4 cycles in your case).  One could say, if steel is subjected to 4 cycles and is ok, then it should by defacto be good for one cycle, yet, this is wrong assumption cause mechanical problems and microstructure of materials varies accordingly based on no. Of cycles for which material will expose. This is apparent in alloy steel and especially for impact test values as an example.  In your case, this forged CS with properties before PWHT can be understood to be " as forged" condition (i.e. Wit...
Post a Comment
Read more

Materails FAQs

By Materials & Welding
Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...
21 comments
Read more

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

By Materials & Welding
Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change.   Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...
Post a Comment
Read more