Welding of A182 F22 material to SS 347

[arcpro]

We have to weld a flange of A182 F22 material to SS 347 pipe. Please guide.

[ashfaqanwer]

Where buttering is not possible:
1. Preheat F22 side at 200 C
2. Weld with ER/E-309L and heat treat the joint when its above 12.7 mm thickness

Where buttering is possible:
1. Preheat F22 side at 200 C
2. Perform buttering on the F22 with ER-NiCr-3 (Inconel 82)
3. Heat treat after buttering at 750 C
4. Then weld with ER-NiCr-3 rods and E-NiCrFe-3 electrodes without preheating and post heating

Hope this would help.

[arcpro]

Thanks.

[arcpro]

Ashfaq,
One more question coming in my mind is regarding heat treatment of weld in 309L as you mentioned.
There seem a possibility of sensitization of stainless steel, what do you say about this?