Dear Mr. Rupesh A. Jambhale
Thanks for your answer first of all. now I am working in project which its material specification spicify that max. CE shall not exceed .38% becasue this for soure service, so , what is the relation between CE and soure service pipeline. Best regards
--- On Wed, 4/28/10, Jambhale, Rupesh A <Rupesh.Jambhale@mottmac-india.com> wrote:
From: Jambhale, Rupesh A <Rupesh.Jambhale@mottmac-india.com>
Subject: RE: [MW:4977] Carbone Equ.
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Date: Wednesday, April 28, 2010, 10:30 AM
Carbon equivalents (CE) seek to account for the sum of the effects of the several elements present in steel on its hardenability, and thus the susceptibility of a weld to cracking. It calculates the steel's potential to form martensite or strengthening carbides based upon the steel chemistry. The higher the carbon equivalent, the harder the steel becomes and more prone to cracking upon cooling. Steels with carbon equivalents (CE) less than 0.4 percent are typically easy to weld and welded without special welding methods. Different codes/ Standards/ literature specify different formulae for calculating CE. Most widely followed is AWS D1.1 which is as follows CE = C + (Mn + Si)/6 + (Cr + Mo + V)/5 + (Ni+Cu)/15 However, Hardnability can be also controlled by pre-heating and thereby reducing the cooling rate and preventing the formation of martensite Regards,
Rupesh A. Jambhale
Inspection Department,
Oil, Gas & Petrochemical Division,
Mott MacDonalds Consultants ( I) Pvt Ltd., Mumbai
-----Original Message----- From: materials-welding@googlegroups.com [ mailto:materials-welding@googlegroups.com] On Behalf Of tamer said Sent: 28 April 2010 13:53 To: materials-welding@googlegroups.com Subject: [MW:4974] Carbone Equ. Why CE calcuations is essential ??? is it for corrosin or weldiability. thx
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please visit http://www.messagelabs.com/email
______________________________________________________________________
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@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 materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@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.
No comments:
Post a Comment