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41CrAlMo7 pipe welded with a St52 DIN 2391 pin

41CrAlMo7 pipe welded with a St52 DIN 2391 pin

41CrAlMo7 pipe welded with a St52 DIN 2391 pin

(OP)
Hi All

i have a 41CrAlMo7 pipe 50mm (2inch) in thicknes that must be  welded with a  St52 DIN 2391  pin, 165mm (6,5 inch) in diameter
after welded the  pipe will be hardned and tempered and than nitrided

usually i weld them with consumable AVESTA P7 weldign wire.

i would try  change the  AVESTA P7 with  Aisi 307
using   Argon + 2-2,5 % CO2  shielding gas

what the expert say?

may thanks
 matteo

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