This will depend on the dilution rate, which again is a function of the welding conditions and of the welders ability.
You can experiment some dilution rates (from 20 to 50%) and find the corresponding FN using the WRC or Schaeffer diagram
Dr. G. Dilintas - Authorized Inspector Supervisor
I&F Regional Technical Manager
Bureau Veritas Piraeus - Greece
Tel: +30 210 40 63 113/4
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04
Raj <raj.inspection@gmail.com>
Sent by: materials-welding@googlegroups.com 19/08/2010 07:51
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Hi Mr.Dilintas,
Thanks for your reply.
As per ASME Sec-II'C' SFA 5.4 and 'Annex A' para A7.12, it was
mentioned that "The 0.04% maximum 'C' content (i.e type 309L- low
carbon) of these weld deposits ensures a higher firrire content than
the E 309H (High C) consumables?
As per above statement, I think there will not be any problem with the
low FN (while using 309L) compared to type 309 or 309H consumables.
I just want to know, how the low 'C' consumables will effect while
welding with the high 'C' base material dilution, especially for CS to
SS welding.
Any feed back please.
Thanks,
Raj
On Aug 18, 4:33 pm, george.dilin...@gr.bureauveritas.com wrote:
> if you do not use 309 type consumables you will get hot cracking because of
> low FN.
> If sensitization is a risk then use 309L type consumables
>
> Dr. G. Dilintas - Authorized Inspector Supervisor
> I&F Regional Technical Manager
> Bureau Veritas Piraeus - Greece
> Tel: +30 210 40 63 113/4
> Fax: +30 210 40 63 118
> Cell: +30 69 44 64 62 04
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