Repair Method for Ferrite Number's Over

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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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