Posted by admin on Wednesday, April 14, 2010 · Leave a Comment
i want to be weld between SA 516 Gr 70 to SA 182M Gr.321. so what is the filler metal/ electrode / MIG coil/ saw coil can i use. I have impact test -50.C for this weld.
what filler can i use to weld between Gr 321 to Gr 304.
(whether E347 or 308 filler)
#The selection of filler metal for attaching the stainless internals to the carbon steel drum. I would give serious consideration to using a nickel-base filler metal like Inconel for these attachment welds.
Two reasons; the linear coefficient of expansion for the nickel-base filler metal is between the linear coefficient of expansion for 316L SS and carbon steel reducing thermal stresses across the weld fusion zones.
Second reason is the potential for carbon migration resulting in premature failure of the weld fusion zone on the carbon steel side of the attachment weld should the operating temperature of the vessel exceed 650 deg F.
*A 309SS filler metal is common for dissimilar metal welds. However, over time the carbon will diffuse from the carbon steel side of the fusion zone to the higher chromium weld deposit. To reduce carbon diffusion, a nickel-base filler metal is used.
*E-347 is better to weld between Gr 321 to Gr 304.
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