ready full detailed article on filler metal selection here https://weldmongerstore.com/blogs/weldingtipsandtricks filler metal charts and resources https://www.esabna.com/shared/documents/litdownloads/alc-10030c_alcotec_alloy_selection_brochure.pdf http://www.alcotec.com/us/en/support/Alloy-Selection-Chart.cfm https://www.washingtonalloy.com/wp-content/uploads/2020/12/stainless-selector-guide.pdf Visit my store at https://weldmongerstore.com/ for TIG cup Kits, TIG Fingers, Gloves, DVDs, and other quality welding tools. New products being added weekly. When a welding procedure specifies a certain filler metal, then that is the filler metal. but sometimes you are the one that selects the filler metal and so I hope this video serves as a guide for best practices.