Dear Bhavesh,
309L mo welding consumable may contain 12to 15% ferrite but barrier layer will have low ferrite due to dilution from carbon steel particularly due to increase of carbon in barrier layer.
vanchi
On Fri, Sep 24, 2010 at 4:04 PM, JIGO <bhaveshpatel.me@gmail.com> wrote:
Dear All,
Generally after barrier layer with SS309LMo we have got more than 10 %
ferrite but with following condition mentioned below i have got
ferrite content in between 1.8 ~ 3.8 FN.
Process : FCAW
Layer : Barrier Layer
Consumable : E309MoLT0-1
Gas : Argon(80%) + CO2 (20%)
Current : 200 - 215 Amp
Voltage : 30 - 32
Speed : 250 mm/min.
Kindly share what should be the reason behind the same.
Regards,
Bhavesh
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