Phosphorus is a low melting compound which remains as liquids during solidifications even after the weld metal get solidifies, this may lead to hot cracking in weld metal. the weld joints fails immediately after welding, for this reasons the phosphorus and sulfur in a steel is keep low as much as possible ..
The stress concentration between liquid phase and solid phase will be very high during solidification, due to the presence of such low temperature melting compounds ,
In material or in weld try to minimizes the presence of phosphorous and sulfur to avoid hot carking.
sudhakar.k
Dear Mr. Mistry,
I assume you mean respectively 0.025 % and 0.030 % instead of 0.0025 % and 0.0030 %?
Met vriendelijke groeten / Best Regards
Herman Pieper
Pieper Quality Support & Inspection
Phone: +31 (0)521 380083
Fax: +31 (0)84 7539225
Cell: +31 (0)6 51691215
Van: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] Namens Vimal Mistry
Verzonden: donderdag 7 juli 2011 8:17
Aan: materials-welding@googlegroups.com
Onderwerp: RE: [MW:11610] Phosphorus content in Material composition
Dear sachin,
Phosphorus is Important to refine the grain structure but it also dangerous produce stress cracking in service life if you could not control during casting/Rolling/ Forging.
As per NACE, Phosphorus limit is 0.0025 Max. For forging & 0.0030 for rolled structures.
Vimal Mistry
Asst. Manager-QA
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Sachin.Shelar1@thermaxindia.com
Sent: Thursday, July 07, 2011 10:31 AM
To: materials-welding@googlegroups.com
Subject: [MW:11609] Phosphorus content in Material composition
Importance: High
I would like to know what is the effect of Phosphorus content in material composition. How do we control phosphorus content if there is a specific requirement ( Is there any method). How much in % effect of Phosphorus content will affect the grain structure(any curves). Is there any specific requirement in NACE MR0175 &103 for % of Phosphorus content in material composition. Please specify references.
Thanking You.
Regards
Sachin Shelar
Sr. Engineer - Process Engg
Thermax Ltd.
Ph +91 20 66126775
E Mail: sachin.shelar1@thermaxindia.com================================================================================================================
DISCLAIMER by THERMAX LIMITED
The information in this email is confidential and may be legally
privileged.It is intended solely for the addressee. Access to this email by anyone else is unauthorized.If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. When addressed to our clients any opinions or advice contained in this email are subject to the terms and conditions.--
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.
- Disclaimer--
This email and any files transmitted with it are confidential and may be privileged or otherwise protected from disclosure and are intended solely for the use of the entity / individual to whom they are addressed. If you have received this email in error or If you are not the intended recipient, please notify the sender immediately by way of telephone or email and delete this message and any files transmitted from your system. Please note that any views presented in the email are solely those of the author and do not necessarily represent those of the organization. While all care has been taken to avoid viruses the recipient is advised to check this email and attachments for presence of viruses. The organization accepts no liability on this account.--
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.
--
With regards,
Sudhakar.k
--
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