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Anonymous Poster

Repair Method for Ferrite Number's Over

08/12/2010 8:08 PM

Dear all,

I have a Vessel consists SA387 Gr.11 Cl.2 material cladded with SS410S.

Construction Code : ASME SEC VIII Div.1.

i have specification that ferrite number is 3~10 FN after weld overlay but after

weld overlay, ferrite number is 14~15 FN .then, i want to know that cause of ferrite

number's over(14~15 FN) and repair method for ferrite number can down(3~10 FN)

(Consumable selected for welding of SS410S is 309L type).

thanks.

Best regards all.
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Manpreet Singh
Associate

Join Date: Aug 2010
Posts: 33
#1

Re: Repair Method for Ferrite Number's Over

08/13/2010 1:25 AM

Dear Member

Can you give detalis about welding process & PWHT?

Usually E309 can attain FN upto 15, so i think a lower FN level filler should have been chosen.

Regards

Manpreet Singh
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mkbj1205
Associate

Join Date: Jun 2010
Posts: 34
#2
In reply to #1

Re: Repair Method for Ferrite Number's Over

08/13/2010 11:15 AM

I'm sorry. my information is mistake.see below is correct

first weld is E309L(carbon to ss clad weld) .then check copper sulfate test and PT(Liquid Penetrant Testing) about first welded area before final weld(E308L). I want to know what is cause ferrite number's over(14~15FN) after final weld(E308L) and what is repair method for FN is turn in spec(3~10 FN)

thanks
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