AISI 409 stainless steel is usually a ferritic stainless steel formulated for Main forming into wrought solutions. Due to the fact I sort of agree which the welds don't seem rather as 'correct' as they might/should. A tad 'hazy' or 'frosty', quite possibly from just a little too much voltage https://www.madanijayateknik.com/service/detail/as-round-bar-plate-sheet-stainless-steel-409-409l-409m-409cb-409ti