ERNiCrMo-3 weld metal is 100% Austentie, so there is no surprise that you get 0% ferrite.
I dont see any negative side of having no ferrite, you only need to take care having a clean surface free from any contamination, a contaminated surface would introduce P & S in the weld metal and can lead to microfissuring.
Your requirement for ferrite comes only in austenitic stainless steel weld metal which has 4 - 8% ferrite after solidification to swallow all those tramp elements.
Regards,
Praveen
--- On Thu, 12/30/10, rinshu <rinshad043@gmail.com> wrote:
> From: rinshu <rinshad043@gmail.com>
> Subject: [MW:9001] ER Ni Cr Mo-3 WELD OVERLAY
> To: "Materials & Welding" <materials-welding@googlegroups.com>
> Date: Thursday, December 30, 2010, 12:15 AM
> Dear all
>
> we have done CRO on SA516 Gr.70 ,we got ferrite content
> above 2.5mm
> from the weld interface as 0% will it have any negative
> effect on our
> CRO(ER NiCrMo-3-filler,SAW-process)
>
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