Buttering
Buttering
(OP)
Don't really know if this is the best place to post this question but here it goes. Doing a 316 SS overlay onto Carbon steel is it nessisary or required to do a 309 SS overlay for buttering purposes? Tring to stay withint the limits of ASME section 8 and 9 for pressure vessels.





RE: Buttering
RE: Buttering
All depends on the cladding method used;- you can overlay in one single pass a layer of 316L in an electroslag strip welding process. Typically you get up to 5 mm thickness with min. 3 mm undiluted 316L overlay (for shell and heads plate) or you can opt for 2 pass weld overlay for the nozzle neck interior and flange facing, or nozzle penetrations. Again, the 309 filler is an option and recommended, but not esential. Depending on your application, you would rather require some ferrite counting for the outer layer (refer API RP 582).
Cheers,
gr2vessels
RE: Buttering
If you are using FCAW method, I would really recommend you for prevention of crack as metengr mentioned
RE: Buttering