You can not overlook client's specifications i.e. minimum 9% Ni. even the test results are up to the mark.
Still, if the test results (mechanical ,chemical) are meeting the requirements, you put a deviation/concession request (by mentioning consumable Ni content minimum, you intend to use) and proceed with your client approval. Then, there is no need to change anything again in production welding.
GL
ವಂದನೆಗಳೊಂದಿಗೆ / Best regards,
Nandesh Kumar A
Abu Dhabi, UAE
P.S. : Please don't print this e-mail unless you really need to.
--- On Mon, 19/11/12, dr firshah <dr_firnas@yahoo.com> wrote:
From: dr firshah <dr_firnas@yahoo.com>
Subject: [MW:15952] Cosumable Electrode NON- Compliance
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Date: Monday, 19 November, 2012, 7:20 AM
Dear Sir & Expert, For your information, our WPQT test has been discontinued by our client due to non-compliance to welding consumable specification which required nickel content of at least 9%
"Consumables shall be chosen to produce welds of compatible chemical composition and with mechanical properties not less than minimum values specified for the base material. For duplex stainless steel, consumables shall have nickel content of at least 9% and the nitrogen content shall be at least 0.14 - 0.2%."
Thus, we seek your advice on this matter whether or not if there is any significant effect on the weldment quality or mechanical testing such as tensile strength,charpy impact test, bend test, hardness, ferrite count , etc. As we refer to ASME II section C specification, the chemical composition requirements for nickel is between 7.5 – 9.5 which we definitely comply with ASME requirements. During WPQT we using 8.6% nickel content and our result for charpy impact exceed the 40J average value as per client requirement. Please help me to convinced our client for consider this consumable because these consumable can give same mechanical properties as per 9% nickel content. We also plan to using 9% nickel content during production.
Thanks.
Aendraa Azhar Welding Engineer
-- 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/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm 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/ http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm 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