Hi Rinshad,
Alloy 625 and alloy 825 have different chemistries. 625 contains more Nickel (typically 58% min) as compared to 38-46% Ni for alloy 825. 625 welding consumable would always be overmatching for alloy 825.Unless there's any restriction for client or from any design specification, 625 strips may be used for ESSC on 825 clad. You need to clarify this issue with client and then proceed.
The beauty with ESSC is that the dilution level is much less,typically 50% of SAWSC. Hence one may not loose alloying elements through dilution. Typically one may achieve consistent 825 or 625 welding chemistry(depending on the filler metal used) on the entire thickness of the deposit.
Matching 825 ESSC strip cladding consumables (strip+flux combinations) are manufactured by some manufacturers.See the attachment from Soudometal and Metrode. While 625products are available universally, because this alloy is very common in any offshore services.
My advice would be :-
- Check with the consumable supplier on the availability of 825 welding consumables. This may be less expensive. Check for the reliability of this product to meet all the mechanical and corrosion test results.
- Should meeting the above is difficult with 825 alloy consumables, the next option would be to select alloy 625 products.
Hope this would be of help.
Appreciating your feedback.
Thanks.
Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist & Consultant
From: rinshad abdul rahman [mailto:rinshad043@gmail.com]
Sent: Thursday, February 16, 2012 2:51 AM
To: pgoswami
Subject: Re: [MW:13697] Acceptance Criteria For Chemical Contents Inconel 625 Overlay
Dear Mr.Pradeep,
--
It should specified by Mr.Budi ,i am still in the starting stage in the welding related things, i feel it is good to study the application environment and to develop the testing requirement for the same.If the environment is not too harsh for Ni alloys like sea water and all we can use overlay with inconel 625 even if the Fe dilution is more. Is it anything wrong in this ?
Budi,Can you please tell us the actual application environment for this inconel weld overlay,so that it might helpful to determine the acceptability of the chemical composition.
Rinshad
On Thu, Feb 16, 2012 at 7:56 AM, pgoswami <pgoswami@quickclic.net> wrote:
Hi Rinshad,What're the technical requirements?Appreciate your feedback.Thanks.Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist & Consultant
Ontario, Canada.
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of rinshad abdul rahman
Sent: Wednesday, February 15, 2012 12:04 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:13697] Acceptance Criteria For Chemical Contents Inconel 625 OverlayDear Mr.Pradip,--
Is anything wrong in accepting more diluted weld deposition with the consideration of application ?For example if our weld metal chemistry is meeting the requirement of Inconel 825 (weld overlay with Inconel 625) which satisfy the application condition without any failure.Is there any test to confirm this ?Rinshad
On Wed, Feb 15, 2012 at 7:23 AM, pgoswami <pgoswami@quickclic.net> wrote:
Hi Budi,The weld deposit should meet C.A requirements of AWS/ASME SFA 5.14(see below). If I could re-collect from the past experiences, meeting C.A in single pass ESSC could be a problem(see the attachment).Fe dilution is always a problem in the first pass.It would be a good point to discuss the issue with the consumable supplier prior hand and resort to multipasses, if there're severe restrictions on Fe dilution in 625 overlay.See the link for the soudometal product catalogue for SAWSC and ESSSC.The attachment is a page extracted from this document.What is the design code? By any chance does the C.A of the deposit has to conform to API Spec, 5LD??Appreciate your feedback.Thanks.Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist & Consultant
Ontario, Canada.
Nb
(Cb)
Other
AWS Classification
mUNS Number
C
Mn
Fe
P
S
Si
Cu
Ni
dCo
Al
Ti
Cr
plus
Ta
Mo
V
W
Elements,
Total
On Tue, Feb 14, 2012 at 7:10 PM, <budi.witjaksono@profab-group.com> wrote:
Dear Colleague,
We do overlay inconel 625 with single layer strip cladding electroslag welding however the chemical contents on weld deposit taken from 3 mm from fusion line does not comply exactly to the chemical composition of Inconel 625.
I have checked the weld deposit chemical composition data from the strip cladding supplier also does not exactly comply to Inconel 625.
Is anyone can tell me what is the chemical composition acceptance criteria for Inconel 625?
Is it correct the weld deposit chemical contents for inconel 625 overlay should conform to ASTM B424 UNS N08825 instead of Inconel 625? If yes, is there any reference standard I can refer to?
Regards,
Budi Witjaksono
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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.
To post to this group, send email to materials-welding@googlegroups.com
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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.
Thanks and Regards................?
Rinshad abdul rahiman Q.C.E OCEAN RUBBER FACTORY L.L.C-ENGG.DIV Al-ghail industrial park,Ras al khaima Tel: +971507103778
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