Re: [MW:29211] Black spots - GMAW - SS347 weld - Ar+2%CO2 mix.

USE Ar+2%O2

THANKS & BEST REGARDS,

KG.PANDITHAN, BE, IWE,  CSWIP 3.1,

ISO 9712 Level 2 in VT,

ASNT-Level II in PT,MT,RT & UT,

LA ISO 9001-2015,

International Welding Engineer. 

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

On Thu, Mar 7, 2019 at 9:13 AM Hrushikesh Sangamnerkar <hrushi612@gmail.com> wrote:

Dear experts,

Currently we are facing issue of black spots on weld with Pulse GMAW for SS 347 welds.

Gas mixture - Argon + 2% CO2

These black spots even after pickling & passivation are not getting removed.

Pl suggest your expert opinion.

Regards,

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