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The issue of low ferrite content in the welds of S32750 duplex steel

2016-09-23View Original

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Dear all, I would like to ask: the ferrite content in the S32750 duplex steel base material is around 40FN. Welding is carried out using shielded metal arc welding, with the electrode type being E2594-16. The welding current is approximately 110A for a φ3.2 electrode and 130A for a φ4.0 electrode. After welding, the ferrite content in the weld is measured to be between 18 and 30FN. What could be the reasons for this relatively low ferrite content? How to solve this problem?

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